Drymocallis lactea
Drymocallis micropetala
Nevada cinquefoil, Sierran woodbeauty
Wasatch drymocallis or wood beauty
short.
short to elongate.
tufted, (0.3–)1.5–6(–6.5) dm;
base 1–2.5 mm diam., not or sparsely, sometimes moderately, septate-glandular.
solitary or ± tufted, (2.5–)3–6 dm;
base 2–4 mm diam., septate-glandular.
usually sparsely to moderately hairy, sometimes glabrate;
basal (2–)5–20(–30) cm, leaflet pairs (2–)3–4(–5);
terminal leaflet broadly obovate to cuneate, 1–4 × 0.7–3.5 cm, teeth usually single, 4–10(–14) per side, apex usually rounded to obtuse, rarely acute;
cauline 1–2, reduced, leaflet pairs 2–3.
moderately hairy;
basal (6–)10–24 cm, leaflet pairs 2–3;
terminal leaflet obovate, 2–5 × 1.5–4 cm, teeth double, (5–)8–12(–15) per side, apex obtuse;
cauline 1–3, well developed, leaflet pairs 2–3.
(2–)5–30(–50)-flowered, not leafy, open, (1/6–)1/5–1/2(–4/5) of stem, narrow to wide, branch angles 10–40(–50)°.
10–20(–30)-flowered, leafy, congested clusters terminating branches, 1/10–1/3(–1/2) of stem, narrow, branch angles 5–20°.
2–10 (proximal to 30) mm, predominantly short-hairy, sometimes velutinous, not or sparsely, sometimes moderately, septate-glandular.
1–5 mm, predominantly short-hairy, often velutinous, sparsely to moderately septate-glandular.
opening widely;
epicalyx bractlets linear-lanceolate to narrowly elliptic, 2–5 × 0.5–1.5 mm;
sepals spreading, 3–8(–9) mm, apex usually acute, sometimes obtuse and apiculate;
petals ± overlapping, spreading, cream-white to bright yellow, broadly obovate, (3–)4–8(–10) × 3–8 mm, usually longer than, rarely equal to, sepals;
filaments 1–3(–3.5) mm, anthers 0.6–1 mm;
styles thickened, 1 mm.
opening widely;
epicalyx bractlets linear to oblanceolate-elliptic, 2–4(–6) × (0.5–)1–1.5 mm;
sepals spreading, 4–7(–9) mm, apex obtuse;
petals not overlapping, spreading, cream-white, obovate-elliptic, 2–5 × 1.5–3.5 mm, shorter than sepals;
filaments 1–2 mm, anthers 0.5–0.8 mm;
styles thickened, 1 mm.
light brown, 1 mm.
reddish, 1.3 mm.
Drymocallis lactea
Drymocallis micropetala
Varieties 2 (2 in the flora).
Drymocallis lactea has had a well-established identity as Potentilla glandulosa var. (or subsp.) nevadensis; however, the epithet lactea has priority at species rank and avoids possible confusion with P. nevadensis Boissier. D. D. Keck (in J. Clausen et al. 1940) based his concept of P. glandulosa subsp. nevadensis on white-petaled plants with narrow inflorescences, the common form in the central Sierra Nevada and south. His map and annotations, however, include populations with yellow petals and widely branched inflorescences from northern California and adjacent Oregon. The two extremes merge in the northern Sierra Nevada, and populations in the North Coast Ranges of California also are problematic; the extremes are accordingly treated here as varieties of a single species. The inclusion by Keck of Washington in the species range might have been based on specimens here assigned to P. pseudorupestris.
Drymocallis lactea can be distinguished from sympatric species by its relatively large, overlapping petals, non-leafy inflorescences, and singly toothed leaflets. Pedicels and distal stems are usually densely short-hairy with relatively few or no glandular hairs (in contrast to D. pseudorupestris), and septate glands are usually absent from stem bases (in contrast to D. hansenii). The distinction between D. lactea and D. pseudorupestris breaks down at the margin of the species range in Nevada and Oregon.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Drymocallis micropetala is poorly known; it combines the aspect and narrow inflorescence of D. convallaria, the small petals of D. glandulosa, and the predominantly short-hairy pedicels of D. deseretica. Plants with equally small petals that occur sporadically throughout the range of D. convallaria are predominantly septate-glandular rather than short-hairy on the petioles and are not included here. As circumscribed here, D. micropetala occurs only in the Wasatch Range of north-central Utah, from Juab to Rich counties; it is possibly of conservation concern.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Inflorescences narrow, branch angles 10–20°; petals cream-white to pale yellowish; pedicels and stems not or sparsely septate-glandular. | var. lactea |
1. Inflorescences wide, branch angles mostly 20–40°; petals usually pale to bright yellow; pedicels and stems sometimes moderately septate-glandular. | var. austiniae |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
