Trillium ovatum |
Trillium ovatum var. oettingeri |
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Pacific trillium, trillium, western trillium, western wake-robin, western white trillium, white or western trillium, white trillium |
Salmon Mountains wake-robin |
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Rhizomes | semierect to horizontal, short, stout, praemorse. |
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Scapes | 1–2, round, 2–5 dm, ± slender, glabrous. |
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Bracts | sessile, subsessile, or short-petiolate; blade medium green, sometimes blotched and mottled, main veins prominent, ovate-rhombic, 7–12 × 5–20 cm, continuing to expand during anthesis, base rounded, apex acuminate. |
distinctly short-petiolate. |
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Flower | erect or nodding, odorless; sepals spreading to horizontal, green, lanceolate to oblong-lanceolate, 15–50 × 6–20 mm, margins entire, apex acute; petals erect-ascending, usually wide-spreading from base, exposing entire pistil, white or with pink or blush markings, lacking V-shaped markings, fading to rosy pink, purple, or dark red, veins not deeply engraved, ± linear to widely obovate, 1.5–7 ×1–4 cm, widest at or above middle, thin-textured, margins flat to undulate, apex acuminate; stamens prominent, slightly recurved-spreading to straight, 10–18 mm; filaments white, shorter than anthers, slender; anthers yellow, 4–16 mm, slender, dehiscence latrorse-introrse; ovary green or white, ovoid, 6-angled, 5–12 mm, attachment ± 3/4 ovary width; stigmas recurved, barely connate basally, greenish white or white, linear, not lobed adaxially, 6–10 mm, uniformly thin; pedicel erect to leaning, 2–6 cm. |
nodding; petals linear to linear-lanceolate, 0.5–2.4 × 0.2–0.6 cm; pedicel ± leaning to almost horizontal. |
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Fruits | baccate, green or white, ± odorless, broadly ovoid, obscurely winged, 1.2–2.8 × 0.7–1.9 cm, pulpy-moist. |
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2n | = 10. |
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Trillium ovatum |
Trillium ovatum var. oettingeri |
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Phenology | Flowering spring–summer (May–Jul). | |||||
Habitat | Coniferous or mixed montane forest | |||||
Elevation | 1200–2000 m (3900–6600 ft) | |||||
Distribution |
w North America
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CA |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 100. | FNA vol. 26, p. 101. | ||||
Parent taxa | Liliaceae > Trillium > subg. Trillium | Liliaceae > Trillium > subg. Trillium > Trillium ovatum | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | T. ovatum subsp. oettingeri | |||||
Name authority | Pursh: Fl. Amer. Sept. 1: 245. (1814) | (Munz & Thorne) Case: Taxon 50: 201. (2001) | ||||
Web links |
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