Douglasia laevigata
Douglasia montana
cliff dwarf-primrose, smooth douglasia
Rocky Mountain dwarf-primrose
prostrate, loosely covered with marcescent, gray to light brown leaves (becoming remote in age).
prostrate to ascending with marcescent, imbricate, gray to light brown leaves.
spreading, thin;
blade oblong-lanceolate or oblanceolate to spatulate, 5–20 × 2–6 mm, margins entire or slightly toothed, sometimes ciliolate, hairs simple, apex obtuse to slightly acute, surfaces glabrous.
spreading to erect, thin;
blade linear-subulate, 4–10 × 0.5 mm, margins entire, ciliolate, hairs simple, apex acute, surfaces glabrous.
2–7 mm, elongating little in fruit, minutely hairy, hairs stellate and branched.
5–20 mm, elongating little in fruit, densely hairy, hairs branched and stellate.
2–10-flowered, bracteate;
bracts 3–8, lanceolate to ovate, 3–8 × 1–3 mm, glabrous or sparsely hairy, hairs minute, branched.
1–2-flowered, ebracteate or bracteate;
bracts 1–3, subulate, 2–3 × 0.5 mm, hairy, hairs simple or forked.
2–15 mm.
present, 0.5–10 mm.
calyx 6–7 × 3–4 mm, stellate-pubescent;
corolla rose-pink, violet in age, limb 8–15 mm diam., lobes 3–4 × 2–3 mm, margins entire or erose.
calyx 4–8 × 3–5 mm, glabrous or slightly hairy, hairs branched and stellate;
corolla rose-pink, limb 6–10 mm diam., lobes 3–5 × 1–2 mm, margins erose or entire.
Douglasia laevigata
Douglasia montana
Although the first collection of Douglasia laevigata was from the “Mountains near Mt. Hood,” the original description of the species was based on plants collected in the Columbia River gorge, which thus represent the nomenclaturally typical variety (L. Constance 1938), even though that entity constitutes an ecological variant with almost glabrous leaves and loose umbels known only from the gorge. The widespread form, var. ciliolata, has more compact umbels and larger, more toothed, conspicuously ciliolate leaves. Because intermediate forms occur commonly, and even the type specimen of D. laevigata has cilia, the infraspecific taxa are not recognized here.
A population of Douglasia laevigata from Cone Peak in the Cascade Mountains of Oregon has been reported as heterostylous due to the occurrence of a protruding “pin type” stigma from the corolla throat; this represents only a local stigmatic anomaly functioning as minor spatial separation of anthers and stigma in early anthesis rather than true heterostyly as seen in Primula. No stigmatic or pollen dimorphisms occur in these plants and no parallel “thrum type” flowers are known.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Specimens of Douglasia montana from Wyoming tend to have two flowers per inflorescence (once recognized as var. biflora); those from the northern part of the range tend to have only one. Because both one- and two-flowered inflorescences occur together on individual plants throughout the range, and no other morphological differences separate the forms, the varietal distinction is not recognized here.
In Alberta, Douglasia montana is known only from Waterton Lakes National Park near the Montana border.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
