Trillium family (Trilliaceae)
Catesby's trillium (Trillium catesbaei) -- in April -- Cherokee National Forest, southern Tennessee white & cream
nodding trillium (Trillium flexipes) -- in April -- Great Smoky Mountains National Park, TN white & cream
large-flowered trillium (Trillium grandiflorum) -- in April -- Cherokee National Forest, southern Tennessee white & cream
yellow trillium (Trillium luteum) -- in April -- Great Smoky Mountains National Park, TN yellow & orange
western trillium (Trillium ovatum) -- in April and June -- Glacier National Park, MT white & cream
western trillium (Trillium ovatum) -- in April -- Columbia River Gorge, northern Oregon white & cream
least trillium (Trillium pusillum) -- in April -- Pisgah National Forest, western North Carolina white & cream
sweet white trillium (Trillium simile) -- in April -- Cherokee National Forest, southern Tennessee white & cream
twisted trillium (Trillium stamineum) -- in April -- Natchez Trace Parkway, southern Tennessee green & brown
southern red trillium (Trillium sulcatum) -- in April -- Pisgah National Forest, western North Carolina red & pink