Jepson eFlora
Key to families | Table of families and genera

Key to Trillium

View taxon page for Trillium

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 the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
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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