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FNA | Family List | FNA Vol. 8 | Saxifragaceae | Mitella

3. Mitella pentandra Hooker, Bot. Mag. 56: plate 2933. 1829.

Five-stamen mitrewort Five-stamen mitrewort

Pectiantia pentandra (Hooker) Rydberg

Plants sometimes stoloniferous. Flowering stems 8-48(-60) cm. Leaves: petiole (0.9-)1.5-8.5 (-14) cm, subglabrous or sparsely short stipitate-glandular and, sometimes, sparsely long stipitate-glandular, longer hairs spreading to retrorse, white, tan, or brown; blade ovate-cordate, ± as long as wide, (1-)2.3-8.5 × (1-)2.1-8 cm, margins shallowly (3-), 5-, 7-, or 9-lobed, doubly crenate-dentate, glabrous, apex of terminal lobe acute to obtuse, surfaces subglabrous or sparsely long stipitate-glandular; cauline leaves usually absent, sometimes 1, proximal or distal, sessile or petiolate, blade 0.2-3 × 0.2-2.2 cm. Inflorescences 1-3(-4), remotely 6-25-flowered, 1-2 flowers per node, not secund, 8-48(-60) cm, glabrous, subglabrous, or sparsely short stipitate-glandular proximally, short stipitate-glandular distally. Pedicels 1.5-5(-8) mm, short stipitate-glandular. Flowers: hypanthium broadly saucer-shaped, (0.6-)0.8-2 × (1.7-)2-2.8 mm; sepals spreading or recurved, greenish yellow or greenish, triangular to broadly triangular, 0.6-1.1 × 0.7-1.2 mm; petals greenish, 5-11-lobed, 1.5-3 mm, lobes linear, lateral lobes spreading; stamens 5, alternate sepals; filaments white, 0.1-0.2 mm; anthers 0.2-0.3 × 0.5-0.7 mm; ovary ± completely inferior; styles divergent, flattened, 0.1-0.2 mm; stigmas 2-lobed. Seeds reddish brown, 0.6-0.9 mm, pitted. 2n = 14.

Flowering May-Aug. Moist woods, stream banks, avalanche tracks, wet mountain meadows, shaded banks; 1000-3700 m; Alta., B.C., Yukon; Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., S.Dak., Utah, Wash., Wyo.


 

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