Flora of North America species comparison

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Drymocallis hansenii

Hansen's cinquefoil, Hansen's drymocallis or wood beauty, Yosemite woodbeauty
Caudex branches

short to elongate.
Stems

usually solitary, sometimes loosely tufted, (3–)4–9 dm;

base (1–)2–4 mm diam., moderately to densely septate-glandular.
Leaves

sparsely to moderately hairy;

basal (7–)10–25(–30) cm, leaflet pairs 3–4;

terminal leaflet broadly obovate, 2–5(–6) × 1.5–3.5(–4) cm, teeth single or double, 6–11 per side, apex usually rounded, sometimes obtuse;

cauline 1–3, proximally well developed, leaflet pairs 2–4.
Inflorescences

10–20(–40)-flowered, not leafy, open, 1/4–2/3 of stem, narrow, branch angles 10–30°.
Pedicels

2–8 (proximal to 20) mm, predominantly short-hairy, sparsely to moderately septate-glandular.
Flowers

opening widely;

epicalyx bractlets linear to narrowly elliptic, 2–4 × 0.5–1 mm;

sepals spreading, 5–8 mm, apex acute to acuminate;

petals overlapping or not, spreading, cream-white to pale yellow, broadly obovate, 4–6 × 3–6 mm, usually longer than, sometimes equal to, sepals;

filaments 1.5–2.5(–3) mm, anthers 0.8–1 mm;

styles thickened, 0.8–1.2 mm.
Achenes

light brown, 0.7–1 mm.
2n

= 14.

Drymocallis hansenii
Phenology Flowering Jun–Sep.
Habitat Moist ground, meadows, open forests, streamsides
Elevation 1200–1900(–2200) m (3900–6200(–7200) ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

D. D. Keck (in J. Clausen et al. 1940) speculated that Drymocallis hansenii was the stabilized recombinant of D. glandulosa var. reflexa and D. lactea. Alternatively, it may represent the California counterpart of D. convallaria, because it tends to have tall, thick-based, single stems and narrow inflorescences. The species is centered in the west-central Sierra Nevada of California, usually occurring in moist meadows and equivalent habitats. Plants near Lake Tahoe, which provide the high-elevation extreme, combine the smaller stature of D. lactea and the glandular-septate stem bases of D. hansenii; their optimal taxonomic disposition is uncertain.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 287.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Drymocallis
Sibling taxa
D. arguta, D. arizonica, D. ashlandica, D. campanulata, D. convallaria, D. cuneifolia, D. deseretica, D. fissa, D. glabrata, D. glandulosa, D. lactea, D. micropetala, D. pseudorupestris, D. rhomboidea
Synonyms Potentilla hansenii, D. glandulosa subsp. hansenii, P. glandulosa subsp. hansenii
Name authority (Greene) Rydberg: Monogr. N. Amer. Potentilleae, 200. (1898)
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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