Jepson eFlora
Key to families | Table of families and genera

Key to Trillium

View taxon page for Trillium

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Flower stalked ..... T. ovatum

2. Petals 5–23 mm (often < 15 mm), 1.8–5.5 mm wide; flower ± nodding; 1200–2000 m; c Klamath Ranges (especially Marble Mtns, Siskiyou Co.) ..... subsp. oettingeri

2' Petals 1.5–7 cm, 5–45 mm wide; flower generally ± erect; 10–1600 m; Northwestern California, Central Western California ..... subsp. ovatum

1' Flower sessile

3. Stamens < 1.25 × pistil; flower odor generally musty or fetid; w Klamath Ranges, Sierra Nevada (except Tehachapi Mountain Area), s Central Coast, Outer South Coast Ranges ..... T. angustipetalum

3' Stamens ± 2 × pistil; flower odor generally sweet rose-like or ± spicy; Northwestern California, Cascade Range, n Sierra Nevada, San Francisco Bay Area

4. Ovary, tissue between anther sacs ± green (ovary ± purple); petals white to ± pink, base occasionally ± purple; Northwestern California, Cascade Range, n Sierra Nevada, San Francisco Bay Area ..... T. albidum

4' Ovary, tissue between anther sacs purple; petals yellow to pink to dark purple, occasionally white; Klamath Ranges, Inner North Coast Ranges, Central Coast, San Francisco Bay Area ..... T. chloropetalum

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Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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