Trillium albidum |
Trillium rivale |
|
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giant trillium, sessile trillium |
brook trillium, brook wakerobin |
|
Leaves | ovate to broadly ovate, 6–20 × 5–15 cm, with weak mottling; spots often fading, not glossy; apex rounded to obtuse, sessile. |
1.7–11 cm × 0.8–6 cm, blue-green; glossy; leathery; apex acute to acuminate; base lanceolate to cordate; petioles (0.5)1– 3(6) cm. |
Scapes | 1–3 (rarely more), 20 |
1–2, 4–20 cm, glabrous. |
Flowers | sessile; sepals lanceolate, 15–65 × 4–15 mm, green; margins entire; apex acute; petals erect or slightly spreading, linear to obovate, 2–8 × 0.5–3 cm, white to cream-colored; base sometimes rose pink to purple, rarely entire petal purple; base often cuneate; apex rounded to acute; margins entire; stamens erect, 10–25 mm; filaments 1–4 mm, white to greenish white; anthers erect, 10–20 mm, yellow or greenish white; ovary ovoid, green or sometimes purple; stigmas erect to spreading, 3–7 mm. |
pedicel 2-10 cm; sepals 3, green, lanceolate or ovate to oblong, 10–23 × 4–8(11)mm; margins entire; apex rounded to apiculate; petals erect to spreading; ovate-cordate to orbicular, 1.3–2.8(3) × (0.8)1–2.4 cm, white, usually with dark purple spots; base rounded to cuneate; margins entire; apex apiculate to acuminate; veins inconspicuous or sometimes with pale venation; stamens 6–15 mm; erect; filaments white; anthers straight, 3–6 mm, yellow; ovary ovoid, 3–9 × 4 mm, white to cream, weakly 6-angled; stigmas recurved, 2–4 mm, white to cream. |
Fruits | ovoid to globose, green to maroon. |
globose; greenish white. |
– | 55 cm long. |
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Trillium albidum |
Trillium rivale |
|
Distribution | ||
Discussion | 2 subspecies. The two subspecies of T. albidum are known to hybridize where their ranges overlap. This hybrid is sometimes referred to as T. × oregonum. |
Stream banks, talus slopes, forest clearings, generally in serpentine soils. Flowering Mar–Jul. 50–1300m. CR, Sisk. CA. Native. This species is sometimes placed in its own monotypic genus, Pseudotrillium. |
Source | Flora of Oregon, volume 1, page 314 Tamra Prior |
Flora of Oregon, volume 1, page 316 Tamra Prior |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Trillium chloropetalum | Pseudotrillium rivale |
Web links |