Drymocallis hansenii
Drymocallis convallaria
Hansen's cinquefoil, Hansen's drymocallis or wood beauty, Yosemite woodbeauty
cordilleran drymocallis or wood beauty, cordilleran woodbeauty, cream cinquefoil, sharp tooth cinquefoil, valley cinquefoil, white cinquefoil
short to elongate.
short.
usually solitary, sometimes loosely tufted, (3–)4–9 dm;
base (1–)2–4 mm diam., moderately to densely septate-glandular.
usually solitary, sometimes tufted, 4–9(–10) dm;
base 2–5 mm diam., ± densely septate-glandular.
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.
sparsely to moderately, rarely densely, hairy;
basal (10–)15–25(–30) cm, leaflet pairs (2–)3–4;
terminal leaflet usually obovate, sometimes elliptic, 3–5(–6) × 1.5–4.5 cm, teeth double, 9–16 per side, apex rounded-obtuse;
cauline (1–)2–4, well developed at least proximally, leaflet pairs usually 3.
10–20(–40)-flowered, not leafy, open, 1/4–2/3 of stem, narrow, branch angles 10–30°.
(5–)10–40-flowered, not leafy, congested to open, (1/8–)1/6–1/3(–1/2) of stem, narrow, branch angles 5–20°.
2–8 (proximal to 20) mm, predominantly short-hairy, sparsely to moderately septate-glandular.
1–5 (proximal to 25) mm, sparsely to ± densely short-hairy, predominantly septate-glandular.
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.
opening ± widely;
epicalyx bractlets narrowly elliptic, (2–)4–6 × 0.7–1.5 mm;
sepals ± spreading, (4–)5–8(–10) mm, apex acute;
petals not or scarcely overlapping, ± spreading, cream-white to pale yellow, obovate-elliptic, sometimes broadly so, (3–)5–8 × (2–)4–6 mm, ± equal to sepals;
filaments 1.5–2.5 mm, anthers 0.7–1 mm;
styles thickened, 0.8 mm.
light brown, 0.7–1 mm.
light brown, 1 mm.
= 14.
Drymocallis hansenii
Drymocallis convallaria
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.)
Drymocallis convallaria is widespread in western North America, occurring mostly west of the Continental Divide from south-central Alaska to Arizona. It differs from most sympatric species in usually having a single thick stem, a narrow inflorescence, and cream-white to pale yellow petals, at most only slightly longer than the sepals.
Some collections from southern Idaho and northern Nevada that have very small petals in the size range of Drymocallis micropetala are included here on the basis of glandular pedicels. Excluded here are comparably small-petaled plants from the Warner Mountains of California and Oregon that have the aspect of D. convallaria but the blunter, redder achenes of D. glandulosa. Populations in northern Idaho and adjacent Washington that approach D. arguta in size and vestiture are provisionally treated as D. convallaria on the basis of leaflet shape. Specimens from New Mexico previously assigned to this taxon have largely been redetermined to D. arguta in the strict sense. See also discussions of Potentilla fissa var. major under 1. D. fissa, and of D. valida under the genus discussion. The illegitimate names P. glutinosa Nuttall ex Rydberg and D. glutinosa Rydberg have been applied most often to D. convallaria.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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