Flora of North America species comparison

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Drymocallis lactea var. lactea

Drymocallis lactea var. austiniae
Photo is of parent taxon

Nevada cinquefoil, Sierran woodbeauty
Photo is of parent taxon

Austin's drymocallis, Austin's drymocallis or wood beauty, Austin's woodbeauty
Stems

(0.3–)1–6 dm;

base glabrate or sparsely to densely short-hairy, not or sparsely septate-glandular.

(0.4–)1.5–4.5(–6.5) dm;

base sparsely to densely short-hairy, sometimes moderately septate-glandular.
Inflorescences

3–20-flowered, 1/5–2/5(–3/4) of stem, narrow, branch angles 10–20°.

(2–)5–30(–50)-flowered, (1/6–)1/4–1/2(–4/5) of stem, wide, branch angles (10–)20–40(–50)°.
Pedicels

5–10 mm, moderately to densely short-hairy, not or sparsely septate-glandular.

2–20(–30) mm, sparsely to ± densely short-hairy, usually eglandular, sometimes sparsely to moderately septate-glandular.
Petals

cream-white to pale yellowish.

(cream-white) pale to bright yellow.
2n

= 14.

Drymocallis lactea var. lactea

Drymocallis lactea var. austiniae
Phenology Flowering May–Aug. Flowering May–Jul(–Aug).
Habitat Rocky, seasonally moist places Rocky seasonally moist places, meadows.
Elevation 1600–3700 m (5200–12100 ft) 900–2800 m (3000–9200 ft)
Distribution
from FNA
CA; NV; OR
from FNA
CA; NV; OR
Discussion

Variety lactea is the most common and conspicuous Drymocallis at higher elevations in the central and southern Sierra Nevada, where it is recognized by its large cream-white to yellowish petals and narrow inflorescences. It also occurs in the San Jacinto Mountains and Transverse Ranges of southern California, and extends into the Intermountain Region from the mountains of southeastern Oregon to central Nevada.

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

Variety austiniae was erroneously treated as Potentilla glandulosa subsp. ashlandica (Greene) D. D. Keck (B. Ertter 1993); it now is understood to be a separate entity. As here defined, it is the common large-petaled, open-flowered Drymocallis of northern California and adjacent Oregon and Nevada, differing from var. lactea in its more widely branched inflorescences and usually pale to bright yellow petals. The boundary between the two varieties is unclear, in part because petal color is uncertain on herbarium specimens. Some collections from Steens Mountain, Oregon, are transitional to D. pseudorupestris var. saxicola. Occasional populations in northern California that combine the morphology of var. austiniae with more glandular vestiture on pedicels and stems might indicate introgression with D. ashlandica or D. pseudorupestris.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 288. FNA vol. 9, p. 288.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Drymocallis > Drymocallis lactea Rosaceae > subfam. Rosoideae > tribe Potentilleae > Drymocallis > Drymocallis lactea
Sibling taxa
D. lactea var. austiniae
D. lactea var. lactea
Synonyms D. glandulosa subsp. nevadensis, Potentilla glandulosa subsp. nevadensis, P. glandulosa var. nevadensis Potentilla glandulosa var. austiniae
Name authority unknown (Jepson) Ertter: J. Bot. Res. Inst. Texas 1: 36. (2007)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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