Test-drive A Teaching Key to Trillium.
Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Liliales
WEAKLEY'S FLORA (11/30/12):
Trillium recurvatum FAMILY Trilliaceae
PLANTS NATIONAL DATABASE:
Trillium recurvatum FAMILY Liliaceae
Prairie Trillium, Prairie Wake-robin
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Richard and Teresa Ware rtw_trillium_recurvatum_7
Leaves distinctly petiolate, borne in an ascending manner, per Weakley's Flora.
Richard and Teresa Ware rtw_trillium_recurvatum_9
Petals 2-3x long as wide, with narrowed bases resembling claws, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
Patrick D. McMillan pdmtrec_1
Sepals become sharply recurved and extend downward between petioles, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.