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trillium, wakerobin

Habit Herbs perennial.
Roots

adventitious, contractile, ringed.

Rhizomes

short; thick, tapered to a point.

Leaves

3; in a whorl subtending flower, sessile or petiolate; ovate to cordate; major veins 3–5;

venation palmate-reticulate.

Scapes

1-several; erect; straight; round, usually aerial (below ground in T. petiolatum).

Inflorescences

terminal, 1 per stem.

Flowers

bisexual;

sepals 3; ovate or obovate to elliptical, green (sometimes with maroon markings); free, alternating with leaves; leaf-like, persistent;

petals 3; ovate to linear, white, pink, yellow; maroon, or purple; free, spreading or recurved, sometimes clawed, withering with age;

stamens 6, alternating in 2 whorls; erect, recurved or divergent;

filaments wider at base;

anthers white or purple;

ovary superior;

stigmas 3, linear to awl-shaped, spreading, twisted, or erect, usually persistent.

Fruits

berry-like capsules, 0.5–3 cm long; fleshy.

Seeds

many; ovoid to elliptical, 2–4 mm, with a large white or yellowish oil body (elaiosome); ant dispersed.

2n

=10.

Trillium foetidissimum

Trillium

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

North America, Asia. 43 species; 5 species in Oregon.

Source Flora of Oregon, volume 1, page 314
Tamra Prior
Sibling taxa
T. albidum, T. cuneatum, T. kurabayashii, T. ovatum, T. petiolatum, T. rivale
Subordinate taxa
T. albidum, T. cuneatum, T. kurabayashii, T. ovatum, T. petiolatum, T. rivale
Web links