Drymocallis arguta
Drymocallis rhomboidea
cordilleran drymocallis, sticky cinquefoil, tall cinquefoil, tall drymocallis or wood beauty, tall wood-beauty
common cinquefoil, globose drymocallis, rhomboid sticky cinquefoil, Siskiyou drymocallis, Siskiyou or globose drymocallis or wood beauty
short.
short.
usually solitary, sometimes tufted, (1–)3–10 dm;
base 3–6 mm diam., ± densely, sometimes sparsely, septate-glandular.
± tufted, 1.7–4.7 dm;
base 1–3 mm diam., usually not septate-glandular.
usually moderately to densely hairy;
basal (6–)12–40 cm, leaflet pairs (3–)4–5;
terminal leaflet broadly elliptic-obovate, (2–)4–10 × (1–)2–4.5 cm, teeth mostly double, 15–30+ per side, apex obtuse to acute;
cauline 2–3, relatively well developed, leaflet pairs 2–4.
moderately to densely hairy;
basal 5–12 cm, leaflet pairs 3;
terminal leaflet obovate-elliptic, 1–2.5(–3) × 1–2(–2.5) cm, teeth single or double, 6–10 per side, apex obtuse to rounded;
cauline 0–2, developed or reduced, leaflet pairs 2–3.
10–40-flowered, not leafy, congested, sometimes more elongate in fruit, 1/10–1/5(–1/3) of stem, narrow, branch angles 5–20°.
5–35-flowered, ± leafy, usually ± open, 1/3–2/3 of stem, wide, branch angles 15–60°.
1–5 (proximal to 15) mm, densely short-hairy, septate-glandular.
1–5 (proximal to 15) mm, predominantly short-hairy, usually not or sparsely, sometimes moderately, septate-glandular.
opening widely;
epicalyx bractlets ± elliptic, 4–6(–8) × 1–2 mm;
sepals spreading, (5–)7–10 mm, apex obtuse to acute, apiculate;
petals overlapping, spreading, cream-white to yellowish, broadly elliptic, (5–)7–9 × (5–)6–8 mm, ± equal to or slightly longer than sepals;
filaments 1.5–2.5 mm, anthers 0.7–1 mm;
styles thickened, 1 mm.
opening narrowly;
epicalyx bractlets linear-oblanceolate, 2–3.5 × 1 mm;
sepals ± erect, 4–6(–8) mm, apex obtuse;
petals not overlapping, ± erect, cream-white, usually narrowly obovate, sometimes oblanceolate, 3–5 × 2–3 mm, usually ± shorter than sepals;
filaments 1.5–3 mm, anthers 0.6–1 mm;
styles slender, 1.5–2.5 mm.
light brown, 1 mm.
light reddish brown, 1–1.2 mm.
= 14.
= 14.
Drymocallis arguta
Drymocallis rhomboidea
Drymocallis arguta is the only species of the genus occurring east of the Rocky Mountains, except for D. fissa in immediately adjacent prairies and the Black Hills of South Dakota. It is primarily a species of intact prairies and pasturelands throughout the Great Plains, extending as scattered populations in equivalent habitats throughout the northeastern states and adjacent provinces. Some of these states consider it a species of conservation concern (as Potentilla arguta, tall cinquefoil), and the sparsely hairy nature of some of these populations suggests that further taxonomic attention might be warranted. Drymocallis arguta occurs also in the Colorado Front Range, generally at elevations higher than D. fissa, with which it sometimes intergrades morphologically. It intergrades also with D. convallaria but tends to be larger, coarser, and more densely hairy with more acute leaflets.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Drymocallis rhomboidea is centered in the Siskiyou Mountains. It differs from D. campanulata in its smaller, cream-white petals and globular flowers; in addition, the vestiture is usually predominantly short-hairy, except in scattered California populations. Plants from Mount Ashland, the type locality, tend to have more congested, leafier inflorescences than plants found elsewhere in the range.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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