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brook trillium, brook wakerobin

giant purple wakerobin

Leaves

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.

ovate to broadly ovate; (9)11–18(25) × (8)12–17 cm, bright green, usually with prominent light and dark green spots, occasionally lightly mottled with mottling fading with age; somewhat glossy;

apex acuminate, sessile.

Scapes

1–2, 4–20 cm, glabrous.

2, 25–55 cm, glabrous.

Flowers

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.

sessile;

sepals oblong- to lance-linear, 3.5–6(7.5) × 1–1.5 cm, green with purple streaks;

margins entire;

apex acute to round-acute;

petals maroon, spreading-erect to erect, linear to oblanceolate, 5.5–11 × 2–3.5 cm; maroon;

base cuneate;

apex round-acute;

margins entire;

stamens erect; (11)15–26 mm;

filaments 2–4 mm, dark purple;

anthers 13–24 mm; dark maroon;

ovary ovoid, dark purple, rounded or with 6 angles;

stigmas erect, 6–8 mm.

Fruits

globose; greenish white.

ovoid to ellipsoid; dark reddish purple.

Trillium rivale

Trillium kurabayashii

Distribution
[WildflowerSearch map]
[WildflowerSearch map]
Discussion

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.

Along streams, meadows, forests, found often with oak trees. Flowering Mar–May. 0–1500m. Est, Sisk. CA. Native.

Source Flora of Oregon, volume 1, page 316
Tamra Prior
Flora of Oregon, volume 1, page 315
Tamra Prior
Sibling taxa
T. albidum, T. cuneatum, T. kurabayashii, T. ovatum, T. petiolatum
T. albidum, T. cuneatum, T. ovatum, T. petiolatum, T. rivale
Synonyms Pseudotrillium rivale Trillium angustipetalum, Trillium chloropetalum
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