Small variation in Trillium spp.
Leaf modelling is a common species trait among the more common sessile trilliums. Variation in modelling is more common than that of non modelled foliage(most likely do to browsing selection of that trait). Floral color is a bit different, variation in color happens a bit less in Trillium spp. and while it occurs in enough frequency that you will probably stumble into floral variation on any walk through high quality habitat, its much less of an occurrence than variable modelling or height.
Trillium sessile forma luteum is a relatively common form of the normal red Trillium sessile, often misidentified as the much larger giant yellow sessile trillium Trillium luteum.
As for our nodding tall friend here, Trillium flexipes, displays variability from common selective pressure in height rather than modelling. At first glance I actually thought the white one might be the white form of T. erectum due to the red color of the stigma, upon closer look the ovaries were not red though. Trillium flexipes forma roseum.
Trillium grandiflora is also known for a roseum form, however it’s often confused with it’s white fading to pink aging in the corolla.
Trillium flexipes and T. cernuum are a bit difficult to id without flower, stigma is much larger than the staminode filaments on T. flexipes where they are at the same level on T. cernuum. T. erectum is much easier, very erect, has a deep red ovaries', and has a fetid odor.
