above: hybrid trillium on past Max Patch heading to Round Mountain
Hybrid Trilliums 2026
Dana Koogler
written 5/9/2026
Hybrid Trilliums 2026 is going to be the final write up on this subject. It has gotten to the point when I try to hunt for information on the topic to learn more about it very little new pops up. Mostly my own writings come up. The combination of trying to enjoy Spring wildflowers, renovate our kitchen, watch my grandkids, and plan trips to focus on spots to view hybrid trilliums resulted in bad things.
- It became a chore or a job instead of a hobby and a joy.
- It wasn't terribly successful this year.
- It has really robbed me of the former enjoyment of the wildflower season in general.
- It is time to put this topic away.
Despite this season being a let down I will say that I had a few really cool experiences and a few special finds this year. I learned some things that proved my own hypothesis about hybridization.
I learned that a previously unproven theory was proven to be true by others. I feel like it is time to move on to new subject matter.
Gobey Hybrids
The first place I studied this year was Gobey. I revisited the color complex out there and branched out to some new areas.
Below is a pink and white Trillium sulcatum hybrid. It reminds me of an apple blossom with the pink and white.
This color pattern has stabilized. I saw it in 2023 and the only difference was it's petals weren't as recurved that year.
Below: Mauve Trillium sulcatum hybrid between white and red parents. It is a stable form of color and morphology. I have seen it occur multiple years.
Below: Trillium sulcatum red parent. No hybridization at all front or back.
Below: another pink blush hybrid T sulcatum with red stamens and ovary. This is a stable color form.
Below: White parent Trillium sulcatum.
Below: Cream parent T sulcatum non hybrid
Below: Another cream parent T sulcatum with the petals not as tightly recurved.
Below: The star of the show today was a Quadrillium! A red mutant Trillium sulcatum with doubling of the genetic material. four petals. Four sepals. Four leaves. Eight stamens instead of the usual six.
It is beautiful, unusual and eye catching. I have seen this before in a white form. The very next year it reverted back to its normal form! I hope to revisit this and see if it reverts back to its normal form.
above is the first mutated trillium I found. It has aged to pink, but if you look closer you can see it has a bit of extra genetic material forming a baby extra petal near its center.
Next on the roster is a pair of Trillium grandiflorum which have the Snow Bunting cultivar genes!
Below is a new example of a snow bunting cultivar out at Gobey. It has a heavy dose of phytoplasma infection. My bet is that this is the last year it comes up. You can see on closer inspection the phytoplasma has given the petals a green look as if they are leaves. It has also interfered with the reproductive parts in the center. One of the things phytoplasma does that eventually kills the flower is interferes with transport of nutrients through it. It causes pollen to become useless as it develops a hard outer shell. It has deformed the reproductive parts to where it is likely sterile. It may have one more year left in it coming up , but it will not set seed.
Below: Greasy Creek Baptism Hole
Below: sweet betsy trilliums growing near the white trilliums
Below: slopes covered in trilliums! and some blackberry brambles
Below: a pair of fresh Trillium grandiflorum non hybrid. non mutant.
Below: another look at slopes full of trilliums
Below: Little Brown Jugs on the steep bank.
Below: a grouping of blue phlox and trilliums
Below: a close up of blue cohosh blooms. It is an important indicator species plant to point to the forest being the right kind to support trilliums.
Below: showy orchis in bloom near the falls
Below: a super pale pink hybrid near the parking area
Below: Bent trillium. Pure white.
Below: a hybrid between Trillium erectum red and T sulcatum white
Below: Trillium sulcatum white form
Below: I'm not sure if this is a T erectum white or a cross between that and something else.
Below. Another Trillium sulcatum white form.
Below: a fresh crisp pair of regular white trilliums
Below: Red Wake robin surrounded by dwarf larkspur
Below: a hybrid wake robin that is almost mauve colored. You can see in the background there is another just like it. It's a similar shade to my nail polish!
One of the things I observed today at Max Patch and beyond was the pedicellate trilliums have hybridized to the point that their pedicles are very floppy. Wake robin bloom forms that droop down. Trillium sulcatum forms that droop down. Not all things about blending are good. Not all of them are an advantage from a horticulture stand point. Perhaps the drooping blooms is providing some sort of reproductive advantage I cannot see. I know I saw lots of it from the beginning of the day to the end.
Below is one of the prettier trillium hybrids from today. It was way out toward Del Rio.
Below: not a hybrid trillium, but the things you find while you're hunting them. An overturned port a potty in the woods! Yikes!
above and below. Two different trillium hybrids side by side. Nearly identical. They are siblings!
Below: T simile non hybrid. A parent plant
Below: another blush pink hybrid which has a nice upright posture
Below: side by side a pink blush hybrid and a pure white T erectum parent plant
Below: another striking hybrid trillium is a red and white blend. Appears to be either T simile x T erectum or T erectum red x T sulcatum.
Below: Here is an example of the hybrids with the weird drooping pedicles. Red front. Striped back. Recurved petals, canoed sepals, but drooping. It has to do with the crossing and the effect on the pedicle and morphology.
Below are three separate images of the same trillium. I am not sure what is going on here. It is white and green! It is healthy. It is not green from phytoplasma infection. It is either a novel new species phenotype or a cross.
All in all Max Patch was a fun place to hunt trilliums. We enjoyed the hikes and drives very much. I would love the chance to visit Wolf Creek Falls from the Del Rio trailhead as well as the hike in from Upper Shut In road. There is an additional waterfall on Upper Shut In Road and some more hiking.
The color complex at Gobey is various forms of Trillium sulcatum that have intermixed creating a veritable rainbow of morphologies and color patterns. Many of them are stable and recur year after year. I saw no evidence of phytoplasma infection in any of these. I notice now the hybrids are beginning to produce more of their own kind. It isn't to the point of being a hybrid swarm of one color or pattern. It is more gradual.
We went further out at Gobey and I turned aside to hunt for mutated trilliums I'd run into before.
I found them!
Below is another view of the same trillium. It is Trillium grandiflorum aged pink. Extra genes.
I am flipping the extra petal up with my finger to make it easier to see.
Below is a new example of a snow bunting cultivar out at Gobey. It has a heavy dose of phytoplasma infection. My bet is that this is the last year it comes up. You can see on closer inspection the phytoplasma has given the petals a green look as if they are leaves. It has also interfered with the reproductive parts in the center. One of the things phytoplasma does that eventually kills the flower is interferes with transport of nutrients through it. It causes pollen to become useless as it develops a hard outer shell. It has deformed the reproductive parts to where it is likely sterile. It may have one more year left in it coming up , but it will not set seed.
Once I'd taken a look at the snow bunting mutants we headed on to another area.
At first we thought we'd never been here at all before. Then we recalled we HAD been but we came down the mountain and out this way. Heading the opposite direction. Additionally it was June so everything looked different. This was our first year seeing what bloomed out here in Spring.
The slopes along the road were loaded down with great white flowered trilliums. Lots of purple phlox too. It was gorgeous! The scenery here was like picture post card.
Below is a photo of the Baptizing Place!
Below: sweet betsy trilliums growing near the white trilliums
We went to the end of the road along Greasy Creek and when it dead ended turned around.
The road appeared to turn into a trail, but we could not remember exactly which one we'd emerged from another trip. We'll have to look at it closer. Someone had cut brush and placed it across the end of the trail to discourage visitors.
We headed back taking in the lovely yards full of flowers and shrubs. There was a pretty creek with a little cascade. I got out to look at it. Good thing I did because I got a closer look at some hybrid trilliums that are rare! I found sessile trilliums that had hybridized. It isn't unheard of, but far more unusual. I likened it to finding a real live unicorn!
Below: Every one of these Trillium cuneatum was hybrid.
Below: close up of my Unicorn. A hybridized T cuneatum that is gold tipped. A blending of Trillium luteum with Sweet Betsy Trillium in a bronze or red form. I have seen a sessile trillium hybrid with gold tips only once before. It was a different sort of hybrid. This is a first.
Below: another pretty hybrid with pale peach and green petals. It is a blending of some some of Trillium cuneatum with likely another color forum of the same species.
Below: a close up of blue cohosh blooms. It is an important indicator species plant to point to the forest being the right kind to support trilliums.
Max Patch Hybrids
The second place I studied was Max Patch. It is such a delight to visit and I've seen so many beautiful wildflowers there over the years. Kenny and I headed that way to do some exploring.
I first checked the area leading up to Little Fall Branch Falls. I saw numerous hybrids there.
I had seen them there before, but not at the falls. Only near the parking area. Today they have multiplied and been fruitful! I found not only hybrids, but hybrid swarms! Nearly all of them crosses of Trillium erectum. The falls was pretty today although the water levels are low.
Below: a pair of hybrids near the falls. They are identical twins to look at them! All the hybrids in this area looked very similar. 
Below: Little Fall Branch Falls
Below: another pinkish hybrid with a dark red eye.
Below: another pink hybrid T erectum with a similar color, but different form.
Below: another hybrid near the falls. It is white edged in red.
Below: the downed trees along this trail helped my study of the area by forcing us out into the woods in a spot I might otherwise have missed!
above: Red Trillium erectum parent.
Below: another hybrid near the falls. It is white edged in red.
Below: white Trillium erectum parent.
Below: this was my favorite from this area... a hybrid with pink dusted petals and a deep red center. The edges of its sepals are also red.
Below: this was my favorite from this area... a hybrid with pink dusted petals and a deep red center. The edges of its sepals are also red.
Down at the parking area I spotted another patch of hybrids. They were the same color patterns I observed in 2023. I also found one lone Bent trillium there. I know that in previous years I saw one or two up near the falls, but this year I did not see them. That doesn't mean anything. I may have overlooked them.
Below is a particularly pretty hybrid near the parking area. Pink with a white center.
Below: I'm not sure if this is a T erectum white or a cross between that and something else.
We started our journey up toward Max Patch proper and I looked all along the roads at different places I've run into hybrids or mutants in the past. 
above and below are two of the prettiest trilliums and oddest ones I saw today. They are yellow trilliums T erectum, but I've never seen them where the entire thing was yellow. Even the center!
I saw one along the Blue Ridge Parkway this year with yellow petals, but a dark center. I am wondering if these are a hybrid between T erectum and T sulcatum. Kentucky has now declared the yellow T sulcatum they have in the southern part of the state a subspecies. That is right up the road from Primroy. They may be the same thing.
Below: Red Wake robin surrounded by dwarf larkspur
One of the things I observed today at Max Patch and beyond was the pedicellate trilliums have hybridized to the point that their pedicles are very floppy. Wake robin bloom forms that droop down. Trillium sulcatum forms that droop down. Not all things about blending are good. Not all of them are an advantage from a horticulture stand point. Perhaps the drooping blooms is providing some sort of reproductive advantage I cannot see. I know I saw lots of it from the beginning of the day to the end.
Below is one of the prettier trillium hybrids from today. It was way out toward Del Rio.
Below: Here is an example of the hybrids with the weird drooping pedicles. Red front. Striped back. Recurved petals, canoed sepals, but drooping. It has to do with the crossing and the effect on the pedicle and morphology.
Below are three separate images of the same trillium. I am not sure what is going on here. It is white and green! It is healthy. It is not green from phytoplasma infection. It is either a novel new species phenotype or a cross.
All in all Max Patch was a fun place to hunt trilliums. We enjoyed the hikes and drives very much. I would love the chance to visit Wolf Creek Falls from the Del Rio trailhead as well as the hike in from Upper Shut In road. There is an additional waterfall on Upper Shut In Road and some more hiking.
I know the forest hike in from Del Rio to the falls is loaded with vasey's trilliums. I'm betting next season it is a hot spot for other good stuff! I get excited just thinking about it! It is like finding treasure!
above: the trail at Jeffrey Hell.
Below is another mutant painted trillium. In addition to being mutated it is sick. I am pretty sure it has phytoplasma infection. I noticed the four leaves and four petals, but the petals are deformed. The brown streaks appear to be where the disease organism is causing the petals to resemble the mocha shade of the leaves. I enlarged the photo to check the morphology of the ovary and reproductive parts. It has a pink streak that is the same shade as the ovary extending out into the petals. Phytoplasma turns leaves into blooms and vice versa. I have NEVER seen a phytoplasma infection in painted trilliums. I cannot find any information or photos on the topic. This may be an example of cold stress at high elevation causing the flower to suffer.
Below: a hybrid that appears to be T erectum x erectum cross between the red and white parents. I saw both at this spot.
Below is a yellow form of Trillium erectum. I am not sure if this is a hybrid. It is certainly pretty. It is unlike the one I spotted at Max Patch. That one was pure yellow all over. This one has a dark ovary. I think this is just a yellow form and not a hybrid. that's the direction I am leaning in.
Below: a purple wake robin with a little bit of phytoplasma infection. Note the maroon streaking in the sepal up top.
Below: white with a purple eye spot hybrid trillium.
Below: a pink and white hybrid trillium hybrid.
Below: a hybrid wake robin of red and white. It looks funny but it is just because it is past peak bloom and the tips of the petals are beginning to dry up. 
Below: T rugeli white parent non hybrid
Below: not the prettiest most perfect specimen, but a white form of Vasey's trillium. Non hybrid parent plant.
Below: I'm laying on the ground looking up under the leaves to take pictures at this point. There are trilliums as far as the eye can see. All beneath leaves. Even the hybrids. The ones below are a mauve shade. The first one is a T rugelli hybrid with probably another T rugeli white. The one next to it is the same shade, but I cannot tell if it is a cross between vaseys of two colors or a blend of white and red of T vaseyi and T rugeli. 
Below: Vaseys trillium true red non hybrid parent
Below: a Vaseys Trillium hybrid between a red and white vasey's parents.
Below: a T rugeli white plant with damage from ?? Possibly some mechanical force like something lying on the stalk as it grew. Not sure.
Jeffrey Hell Hybrids
Jeffrey Hell is the ONLY place along the Cherohala Skyway where I've found evidence of hybridization. It is the third place I looked for them this year. I finally found them, but they were so dried up I could not tell what color they'd been. I arrived too late to study them this season. The hot dry conditions this season seem to have pushed the bloom to get done rapidly. It was frustrating to say the least.
Checking further all along the Skyway's slopes and back roads all we saw was Red Trillium erectum. 98% of the trilliums or better were regular red ones. Without the presence of other color forms it is unlikely to find blends of any kind. I read about something while studying up for this season. I learned of "heliotropism". It means a flower or plant will tend to follow the sun
to maximize photosynthesis. High elevation plants tend to do this more as a reproductive advantage. It causes them to move through their life cycle and flower before leaf out to capture more sunlight.
Below: typical purple wake robin trillium
Below: one other hybrid seen all day is a past peak bloom Trillium cuneatum. It was not at Jeffrey Hell, but up toward Wolf Laurel.
Below: a fresh, pretty Red Wake Robin trillium.
Blue Ridge Parkway Hybrids
The Blue Ridge Parkway and Pisgah National Forest were the fourth and final place I checked out hybrids this season. It was a fruitful trip. One of the places I full expected to find hybrid trilliums was Elk Pasture Gap. It did not materialize. Lots of trilliums, but not a single hybrid.
None with any mutations either. I had a list of spots with GPS coordinates to check. That got old real quick. It wasn't hard, but there is something about it that feels perfunctory and just takes the joy out of the experience. I think this is more of the Contrarian coming out in me.
Anything I am expected or forced to do I resent it. Today my only boss was me, but I found I am like that even for myself! If I ever acted like that in a real work situation I'd be fired! Well, I say that, but today's Gen Z and some others who no call/no show to work might make me seem acceptable.
Below: trilliums of white and aged to pink at Elk Pasture Gap. Pretty, but not hybrid.
Another spot we visited during this trip was near Mt. Pisgah along the parkway. I found lots of weird painted trilliums. Many with four petals and four leaves, four sepals.
Below is a normal painted trillium
Below is one of the four petaled type.
Below is another mutant painted trillium. In addition to being mutated it is sick. I am pretty sure it has phytoplasma infection. I noticed the four leaves and four petals, but the petals are deformed. The brown streaks appear to be where the disease organism is causing the petals to resemble the mocha shade of the leaves. I enlarged the photo to check the morphology of the ovary and reproductive parts. It has a pink streak that is the same shade as the ovary extending out into the petals. Phytoplasma turns leaves into blooms and vice versa. I have NEVER seen a phytoplasma infection in painted trilliums. I cannot find any information or photos on the topic. This may be an example of cold stress at high elevation causing the flower to suffer.
Below is another example of a sick trillium. It has four petals and four leaves, but the sepals are streaked and the petals have an odd shape and the same mocha shading as if the leaf parts were melded with the petals. It is hard to see at this size. I had to blow the images up to view it.
Blue Ridge Parkway Color Complex
It took forever more AWHILE to find the color complex on the parkway. I had waypoints, but they were not correct. Kenny was my lucky star. He found it! I am so proud of him! He is more observant all the time.
Below is a pretty capture of this beautiful spot along the park way. The slopes are filled with trilliums and ferns. Down lower there was umbrella leaf and lots of blue cohosh. I also saw baneberry.
Below: a hybrid that appears to be T erectum x erectum cross between the red and white parents. I saw both at this spot.
Below is a yellow form of Trillium erectum. I am not sure if this is a hybrid. It is certainly pretty. It is unlike the one I spotted at Max Patch. That one was pure yellow all over. This one has a dark ovary. I think this is just a yellow form and not a hybrid. that's the direction I am leaning in.
Below: a pretty red and white or red and yellow hybrid. It is very dappled.
Below: a purple wake robin with a little bit of phytoplasma infection. Note the maroon streaking in the sepal up top.
Below: a pink and white hybrid trillium hybrid.
Below that the white trillium is a Trillium flexipes . They are pure white. The presence of this amidst the wake robins trilliums is possibly why there is so much going on with crazy colors!
If there were more of these I did not see them, but many were past peak bloom and dried up. I hope to revisit this spot earlier next season to enjoy the colors.
Pisgah Forest Color Complex
This color complex at a lower elevation was peak bloom though I figured it would be way past done! I was pleasantly surprised to find it peak bloom. This color complex is expansive. It extends to both sides of a road and stretches on for quarter to half a mile. The ancestral plant parents here are white T rugeli, red T rugeli, the typical red form of Vasey's trillium, and white vasey's trillium. I sat down and did the combinatorics on the possiblities. I used an app to check my work after I was done. I came up with 12 new F1 hybrids (first generation) if all possible combinations were done. The app said 24. I failed to factor in the possible crossing of Hybrid 1 with Hybrid 2 making another batch . 24 hybrids from 4 original parent plants is the max. No guarantee of that, but it is mathmatically correct. You have to factor in permutations.
Suffice it to say that this color complex is way bigger and more diverse than I originally thought. Jim Fowler and Alan Cresler have visited here along with Walter Ezell. I know Jim did not find the full extent of it. I know why too!
I saw so many different kinds that I finally was overwhelmed and quit taking photos. I just enjoyed seeing them. I completely lost myself. I was not worried about snakes or poison ivy or anything. I lay down in the forest floor and just looked and took pictures. I know Alan and Jim well enough to say Jim probably lost all sense of what was around him besides trilliums!
Below a Trillium hybrid T rugelli x vaseyi blend
Below is a T rugeli non hybrid parent plant. Notice how the bloom is tighty up against the plant, but under the leaves. This plant had insect damage on the leaves.
Below: a Vaseys Trillium hybrid between a red and white vasey's parents.
Cathey's Creek Hybrids
One of the places we visited where I had no plans to look for hybrids was Cathey's Creek.
I ran across one lone hybrid in the middle of the trail. It had been stepped on. All around it were many regular looking Vasey's trilliums. I saw no sign of a single different colored trillium of any kind.
Below: We encountered Vasey's trilliums on both sides of the stream. One hybrid on the north side of the stream. We spotted too many vasey's trilliums to count on the south side near the falls. Something was different about them. The one shown below looks normal.
Over half of them had red fronts and appeared normal and non hybrid. Yet the backs were striped white. I searched and searched for any sign of a different colored parent trillium.
I was about to give up when I spied a Trillium erectum white form drying up along the trail.
That one is all it took to create all these hybrids.
The three photos below are the backs of many of the Vasey's trilliums which had stripes!
I checked the Trilliums book by Frederick and Roberta Case which is the definitive guide on the subject. Page 154-157 goes over Vasey's trilliums. It mentions that the backs of them may be a paler color, but does NOT mention striping. It does mention hybrid crosses and albino specimens.
Based on what I read I think they have visited the colony I did in Pisgah Forest.
Conclusion & Bullet Points
- Sympatric speciation is where two ancestral parents form new species but they all continue to exist in the same area. I first learned of and wrote about this in 2023. At that time it was still contentious as to whether it existed. During the intervening three years experiments have been done that prove its existence. My own observations in at least five separate areas of study have born that out.
- Trilliums do better in mid elevation areas from 1500 to 2000 feet.
- Higher elevations are colder and the flowers cope with that by growing smaller sizes and less blooms. It does have an effect on hybridization, but not directly because of the elevation. It is the temperature at higher elevations that presents a challenge.
- High elevations/colder temperatures decrease a trillium's chances for hybridization because it can delay bloom times, cause abnormal forms of morphology due to stress, and both of these lead to genetic isolation.
- Trilliums like limestone areas as well as nutrient rich soils.
- I found an article that shows that the mountains of North Carolina which contain hornblende are particularly good for growing trilliums. Hornblende is a metamorphic rock that when it breaks down and forms soil contains high values of nutrients such as magnesium, iron, and calcium.
- Trillium erectum remains the most likely to hybridize of all the trilliums.
Indictor species of good forest areas for trilliums include blue cohosh, umbrella leaf,
black cohosh, baneberry (dolls eyes), golden alexander, and wild geranium.
- Hybrids formed between the same species not only hybridize more readily, but the color forms seem to stabilize faster.
- Trilliums exhibit something called "phenotype plasticity" which is the ability of one genotype to produce more than one phenotype.
- Transcriptomic shock is demonstrated in four of six color complexes I have studied for several years. This is the immediate, extensive, chaotic alteration of gene expression patterns that occur following interspecific hybridization combining two different genomes.
- Thus places like Gobey, Pisgah Forest, Blue Ridge Parkway and Primroy are likely to exhibit odd color forms and patterns for many more years.
Genotype = the total genetic script that makes up the organism
Phenotype= the actual way the organism comes out looking.. what genes are actually expressed and not just part of it's make up.
Below: a group of hybrid trilliums at Max Patch near the falls.
Finally I am sharing here a poem called Trilliums by Mary Oliver.
Every spring
among
the ambiguities
of childhood
the hillsides grew white
with the wild trilliums
.
I believed in the world.
Oh, I wanted
to be easy
in the peopled kingdoms,
to take my place there,
but there was none
that I could find
shaped like me.
So I entered
through the tender buds,
I crossed the cold creek,
my backbone
and my thin white shoulders
unfolding and stretching.
From the time of snow-melt,
when the creek roared
and the mud slid
and the seeds cracked,
I listened to the earth-talk,
the root-wrangle,
the arguments of energy,
the dreams lying
just under the surface,
then rising,
becoming
at the last moment
flaring and luminous --
the patient parable
of every spring and hillside
year after difficult year.
