Ohio, Pennsylvania, South Dakota, West Virginia, Wisconsin Trillium ovatum – Alberta, British Columbia; California, Colorado, Idaho, Montana, Oregon, Washington, Wyoming Trillium scouleri – Alberta, British Columbia; Colorado, Idaho, Montana, Washington, Wyoming Trillium subgenus Delostylium This subgenus has pedicellate flowers (except for one variety of T. pusillum) with a definite style and solid green leaves (not mottled). Distribution is restricted to the southeastern and south central United States. Trillium catesbaei – Alabama, Georgia, North Carolina, South Carolina, Tennessee Trillium georgianum – Georgia Trillium persistens – Georgia, South Carolina Trillium pusillum – Alabama, Arkansas, Georgia, Kentucky, Louisiana, Maryland, Mississippi, Missouri, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia, West Virginia Trillium subgenus Sessilium This subgenus (previously known as ) includes species with sessile flowers (no flower stalk), erect petals (except in T. stamineum), and mottled leaves (except in T. petiolatum and occasionally in plants of other sessile-flowered species). Trillium albidum – California, Oregon, Washington Trillium angustipetalum – California Trillium chloropetalum – California Trillium cuneatum – Alabama, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee Trillium decipiens – Alabama, Florida, Georgia Trillium decumbens – Alabama, Georgia, Tennessee Trillium delicatum – Georgia Trillium discolor – Georgia, North Carolina, South Carolina Trillium foetidissimum – Louisiana, Mississippi Trillium gracile – Louisiana, Texas Trillium kurabayashii – California, Oregon Trillium lancifolium – Alabama, Florida, Georgia, South Carolina, Tennessee Trillium ludovicianum – Louisiana, Mississippi, Texas Trillium luteum – District of Columbia, Georgia, Kentucky, North Carolina, Tennessee Trillium maculatum – Alabama, Florida, Georgia, South Carolina Trillium oostingii – South Carolina Trillium petiolatum – Idaho, Oregon, Washington Trillium recurvatum – Alabama, Arkansas, Illinois, Indiana, Iowa, Kentucky, Louisiana, Michigan, Mississippi, Missouri, Ohio, Tennessee, Texas, Wisconsin Trillium reliquum – Georgia, South Carolina Trillium sessile – Alabama, Arkansas, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Michigan, Missouri, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, West Virginia Trillium stamineum – Alabama, Mississippi, Tennessee Trillium underwoodii – Alabama, Florida, Georgia Trillium viride – Illinois, Missouri Trillium viridescens – Arkansas, Kansas, Missouri, Oklahoma, Texas Ungrouped taxa The following pair of taxa are widely accepted but do not fit into any of the above groups since they are markedly different from other Trillium species. There is evidence to support the segregation of these species into a separate genus (Trillidium) but the proposal is controversial. Trillium govanianum </ref> – NE Afghanistan, Bhutan, China (Tibet Autonomous Region, Yunnan), N + NE India (Himachal Pradesh, Jammu and Kashmir,