Douglasia laevigata

A. Gray

Proc. Amer. Acad. Arts 16: 105. 1880 ,.

Common names: Cliff dwarf primrose
Endemic
Synonyms: Douglasia laevigata subsp. ciliolata (Constance) Calder & Roy L. Taylor Douglasia laevigata var. ciliolata Constance
Treatment appears in FNA Volume 8. Treatment on page 266. Mentioned on page 264.

Plants loosely cespitose mats with branched caudex. Stems prostrate, loosely covered with marcescent, gray to light-brown leaves (becoming remote in age). 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. Scapes 2–7 mm, elongating little in fruit, minutely hairy, hairs stellate and branched. Inflorescences 2–10-flowered, bracteate; bracts 3–8, lanceolate to ovate, 3–8 × 1–3 mm, glabrous or sparsely hairy, hairs minute, branched. Pedicels 2–15 mm. Flowers: 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.


Phenology: Flowering early summer.
Habitat: Rocky areas
Elevation: 30-2000 m

Discussion

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.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Douglasia laevigata"
violet +  and white +
not connivent +
erose +  and entire +
obtuse;slightly acute +
Sylvia Kelso +
A. Gray +
attenuate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
crenulate +  and denticulate +
oblanceolate;spatulate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
hairy +  and glabrous +
3 +  and 8 +
lanceolate +  and ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
stellate-pubescent +
5-angled +  and campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ovoid +  and globose +
Cliff dwarf primrose +
violet +  and rose-pink +
salverform +
constricted +
B.C. +, Oreg. +  and Wash. +
30-2000 m +
operculate +  and capsular +
Rocky areas +
branched +  and simple +
nectariferous +
minute +
bracteate +  and 2-10-flowered +
solitary +, involucrate +  and 2-10-flowered +
gray +  and light-brown +
marcescent +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not reflexed +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
erose +  and entire +
dentate +  and entire +
toothed +  and entire +
tenuinucellate +  and bitegmic +
erect +  and ascending +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
purple;rose;purple;rose;pink +
Flowering early summer. +
Proc. Amer. Acad. Arts +
elongating +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
oblong +  and 4-angled +
connate +  and distinct +
branched +  and simple +
prostrate +  and ascending +
inflated +
Douglasia laevigata subsp. ciliolata +  and Douglasia laevigata var. ciliolata +
Douglasia laevigata +
Douglasia +
species +
perennial +  and annual +
stoloniferous +  and rhizomatous +