This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Purple Trillium: Ill-scented.
Wake Robin: Birthroot. Trillium erectum.
Lily Family. Apr. - June.
Plant 8 - 16 inches high, found in rich woods.
Eastern Quebec south to North Carolina, west to Minnesota and Missouri.
Brown-purple, dull pink, white or greenish, divisions 3, on short stalk from junction of leaves.
Broad, 3 in a whorl.

Wake Robin.
Stem-less Trillium. T. sessile. Flowers stemless, dark purplish or greenish. T. recurvatum. Outer divisions of flower reflexed; colored divisions narrowed at the base; leaves narrowed into a stem.
 
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