Keys to Nature
Project
Key to the Genus Trillium


© Paul Rothrock,Trillium recurvatum - Keys to Nature Project

Title:
Key to the Genus Trillium
Version:
63
Author(s):
Sara B. Duncan, Sarah E. Davis, Paul Rothrock
Email:
plrothroc@taylor.edu
Description:

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Key Structure:
1. Flowers pedunculate; petals spreading or recurved; leaves uniformly green.
2. Ovary 3-angled or 3-lobed, not winged.
3. Petals pink streaked towards base; sepal margins undulate - T. undulatum.
3. Petals white; sepal margins entire - T. nivale
2. Ovary 6-angled, 6-ridged, 6-winged.
4. Leaves broadly rhombic; ovary dark, pink, or white; styles stout and recurved.
5. Petals usually white; ovary pink or white.
6. Petals strongly recurved; peduncles nodding; anthers 4-7 mm T. cernuum
6. Petals spreading; peduncles horizontal to somewhat nodding; anthers 7-15 mm T. flexipes
5. Petals usually maroon; ovary dark. T. erectum
4. Leaves ovate to rhombic; ovary white; styles slender and more or less straight T. grandiflorum
1. Flowers sessile; petals erect; leaves often mottled.
7. Sepals spreading; leaves sessile orbicular T. sessile
7. Sepals recurved; leaves petiolate elliptic - T. recurvatum

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This page was last modified on: Tue, 21 Apr 2009 10:05:05 -0500.