Autik. Bot.,133. 1840
Phenology: Flowering spring (Apr–early Jun).
Habitat: Rich wooded slopes, floodplains in deciduous forests, especially over limestone
Elevation: 100–600 m
Although there are no named varieties of Trillium flexipes, many forms exist and at least one has been named, forma walpolei (Farwell) Fernald. F. W. Case and G. L. Burrows (1962) mapped the occurrence of forma walpolei for Michigan and found it to occur only along the contact zone between T. flexipes and T. erectum. F. W. Case and R. B. Case (1993) crossed typical T. erectum and T. flexipes to produce identical color variations as occur in these wild, mixed-species populations. I consider this form to be a hybrid expression. Some of the hybrids have petals colored proximally and white distally, superficially resembling T. undulatum. Dried specimens, when hastily examined, resemble T. undulatum superficially and probably account for reports of that species from locations near Ann Arbor, Michigan, and various places in Indiana and Illinois, all of which are well out of the range of T. undulatum.
|Author||Frederick W. Case Jr. +|
|Common name||Bent trillium + and declined trillium +|
|Elevation||100–600 m +|
|Habitat||Rich wooded slopes, floodplains in deciduous forests, especially over limestone +|
|Illustrator||Yevonn Wilson-Ramsey +|
|Phenology||Flowering spring (Apr–early Jun). +|
|Synonym||Trillium declinatum + and Trillium gleasonii +|
|Taxon name||Trillium flexipes +|
|Taxon parent||Trillium subg. Trillium +|
|Taxon rank||species +|
|Volume||Volume 26 +|