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petioled wakerobin, round-leaved trillium

Leaves

round or ovate to elliptic, 7–14 × 5.5– 10.2 cm, green, not mottled, not glossy;

apex round or obtuse;

petioles 5–17 cm.

Scapes

usually 1, 4–20 cm, glabrous, generally subterranean (occasionally vertical).

Flowers

sessile;

sepals oblong-elliptic to oblanceolate, 20–45 × 7–10 mm, green;

margins entire;

apex acute;

petals erect to incurved, linear-lanceolate, 3–5.5 × 0.4–1 cm; light maroon-red or purple, sometimes yellow to greenish;

margins entire;

apex acute;

stamens erect; (15)22–30 mm;

filaments (3)5–7 mm, dark green;

anthers 16– 20 mm, purple-brown to dark green;

ovary ovoid, 4–9 mm, white to greenish; purplish distally;

stigmas erect, 7–20 mm.

Fruits

ovoid.

Trillium cernuum

Trillium petiolatum

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Seasonally wet places, conifer and mixed forests, near streams and rivers. Flowering Apr–Jun. 400–1900m. BW, Lava. ID, WA. Native.

Source Flora of Oregon, volume 1, page 315
Tamra Prior
Sibling taxa
T. albidum, T. cuneatum, T. kurabayashii, T. ovatum, T. petiolatum, T. rivale
T. albidum, T. cuneatum, T. kurabayashii, T. ovatum, T. rivale
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