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Key to families | Table of families and genera

This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.

Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

TRILLIUM WAKEROBIN, TRILLIUM

Dale W. McNeal & Bryan D. Ness


Rhizome short, thick, spreading to erect.
Stem: erect, >=1 per rhizome.
Leaf: 3, in 1 whorl subtending flower, sessile or subsessile, ± ovate.
Inflorescence: flowers 1 per stem, erect to nodding, stalked or sessile.
Flower: bisexual; sepals 3, free, persistent, ± green; petals 3, free, withering, white, ± pink, ± yellow, or purple; stamens 6; ovary chambers 3, styles 3.
Fruit: capsule, ± berry-like.
Seed: many, ovoid.
± 30–40 species: North America, Asia. (Latin: 3, from leaves) [Farmer 2006 Aliso 22:579–592; Freeman 1975 Brittonia 27:1–62] Trillium rivale moved to Pseudotrillium.

Key to Trillium

1. Fl stalked ..... T. ovatum

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

2' Petals 1.5–7 cm, 5–45 mm wide; flower generally ± erect; 10–1600 m; NW, CW ..... subsp. ovatum

1' Fl sessile

3. Stamens < 1.25 × ovary; flower odor generally musty or fetid; w KR, SN (except Teh), s CCo, SCoRO ..... T. angustipetalum

3' Stamens ± 2 × ovary; flower odor generally sweet rose-like or ± spicy; NW, CaR, n SN, SnFrB

4. Ovary, tissue between anther sacs ± green (ovary ± purple); petals white to ± pink, base occasionally ± purple; NW, CaR, n SN, SnFrB ..... T. albidum

4' Ovary, tissue between anther sacs purple; petals yellow to pink to dark purple, occasionally white; NCoRI, SnFrB ..... T. chloropetalum

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