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Pacific mitrewort, threepart miterwort

angle-leaf Bishop's-cap, angle-leaf mitrewort, angleleaf miterwort

Habit Plants not stoloniferous. Plants not stoloniferous.
Flowering stems

12–45 cm.

15–50(–65) cm.

Leaves

petiole 2.5–10 cm, subglabrous or short stipitate-glandular and long stipitate-glandular, longer hairs retrorse, white, tan, or brown;

blade cordate, cordate-ovate, or reniform, usually shorter than or sometimes ± as long as wide, 1.2–6 × 2–8 cm, margins shallowly 5- or 7-lobed, crenate, uniformly ciliate, apex of terminal lobe rounded to obtuse, surfaces short stipitate-glandular and sparsely long stipitate-glandular;

cauline leaves absent.

petiole 3–10(–19) cm, short stipitate-glandular and sparsely long stipitate-glandular, longer hairs spreading or retrorse, white or reddish brown;

blade cordate-ovate or triangular-cordate, longer than or ± as long as wide, 1.3–7.7(–9) × 1.2–7.1(–8) cm, margins 5- or 7-lobed, irregularly crenate or dentate, uniformly ciliate, apex of terminal lobe acute, surfaces short stipitate-glandular and sparsely long stipitate-glandular;

cauline leaves absent or 1–2, proximal, alternate, petiolate, 0.3–3 × 0.3–1.6 cm.

Inflorescences

1–3, closely 4–20-flowered, 1 flower per node, weakly secund or not secund, 12–45 cm, short stipitate-glandular and, sometimes, sparsely long stipitate-glandular proximally and distally.

1–3, closely to remotely 8–35-flowered, 1(–2) flowers per node, weakly secund or not secund, 15–50(–65) cm, short stipitate-glandular and sparsely long stipitate-glandular proximally, short stipitate-glandular distally.

Pedicels

0.3–1.5 mm, short stipitate-glandular.

0.2–1.5 mm, short stipitate-glandular.

Flowers

hypanthium campanulate, 1–1.5 × 1.5–2.5(–3) mm;

sepals erect or spreading, whitish or purple tinged, oblong to triangular-ovate, 0.8–1.5 × 1–1.3 mm;

petals white, sometimes pink or purple tinged, 3-lobed or, sometimes, unlobed, 1–3.5 mm, lobes lanceolate, lateral lobes ascending;

stamens 5, opposite sepals;

filaments white, 0.1–0.2 mm;

anthers 0.1–0.2 × 0.1–0.2 mm;

ovary ca. 1/2 inferior;

styles divergent, flattened, 0.1–0.2 mm;

stigmas unlobed.

hypanthium obconic-campanulate, 1.2–1.8 × 1.4–2.2 mm;

sepals erect or spreading, whitish, oblong-ovate to oblong-triangular or triangular, (0.6–)0.9–1.2 × 0.6–1 mm;

petals white, sometimes pink or purple tinged, 3–5-lobed, 1–1.5 mm, lobes linear, lateral lobes ascending;

stamens 5, opposite sepals;

filaments white, 0.2–0.3 mm;

anthers 0.1–0.2 × 0.1–0.2 mm;

ovary at least 3/4 inferior;

styles spreading, flattened, 0.1–0.2 mm;

stigmas indistinctly 2-lobed.

Seeds

dark reddish brown, 0.7–1 mm, pitted.

dark reddish brown or blackish, 0.8–1.4 mm, pitted.

2n

= 14.

= 14.

Mitella trifida

Mitella diversifolia

Phenology Flowering May–Jul. Flowering May–Jul.
Habitat Deep forest, moist wooded and open slopes Moist woods, stream banks
Elevation 300-2000 m (1000-6600 ft) 500-2000 m (1600-6600 ft)
Distribution
from FNA
AK; CA; ID; MT; OR; WA; AB; BC
from FNA
CA; OR; WA
[WildflowerSearch map]
Discussion

Mitella trifida varies in flower size, petal-blade lobing, and pubescence. Plants with relatively small flowers and petal blades entire or shallowly trifid and often purplish have been named var. violacea. Plants matching this description occur in British Columbia, Montana, and Washington and appear to represent a minor morphological variant that does not warrant recognition.

The Gosiute Indians of Utah made an infusion from roots of Mitella trifida to treat colic (D. E. Moerman 1998).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Mitella diversifolia occurs from Klickitat County, Washington, south to El Dorado County, California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 8, p. 114. FNA vol. 8, p. 113.
Parent taxa Saxifragaceae > Mitella Saxifragaceae > Mitella
Sibling taxa
M. breweri, M. caulescens, M. diphylla, M. diversifolia, M. nuda, M. ovalis, M. pentandra, M. stauropetala
M. breweri, M. caulescens, M. diphylla, M. nuda, M. ovalis, M. pentandra, M. stauropetala, M. trifida
Synonyms M. trifida var. violacea, Ozomelis anomola, Ozomelis micrantha, Ozomelis trifida Ozomelis diversifolia
Name authority Graham: Edinburgh New Philos. J. 7: 185. 1829 , Greene: Pittonia 1: 32. 1887 ,
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