Potentilla anglica
Potentilla demotica
English cinquefoil, potentille d'angleterre, trailing cinquefoil, trailing tormentil, wood cinquefoil
Hualapai cinquefoil
soon becoming prostrate, ± flagelliform, usually openly branched, eventually rooting at some nodes, (0.3–)1.5–7+ dm.
0.2–1.5(–2) dm.
± persistent, ternate or palmate, 2–10(–12) cm;
petiole 1–7(–8) cm, long hairs sparse to abundant, appressed, 0.5–1 mm, stiff, glands absent;
leaflets 3–5, central ± obovate to cuneate, 1–3(–3.5) × 0.8–2(–2.5) cm, distal ± 1/2 of margin incised 1/4–1/3(–1/2) to midvein, teeth 2–4 per side, surfaces similar, green, sparsely to moderately hairy.
usually palmate, sometimes ternate, 2–8 cm;
petiole 1–7 cm, long hairs common, spreading to ascending, 1.5–2.5 mm, weak to ± stiff, glands abundant;
leaflets (3–)5, central oblanceolate, 0.5–1.5(–2) × 0.4–0.8 cm, scarcely petiolulate, distal ± 3/4 of margins ± evenly incised 1/2–3/4 to midvein, teeth 2–3(–4) per side, surfaces green, long hairs sparse to common, 0.5–1.5 mm, glands abundant.
2–3(–4) proximal to 1st flowering or branching node, usually well expanded at anthesis, usually ternate, 2–6(–10) cm;
petiole 0.3–4(–8) cm;
leaflets (3–)5, ± resembling or narrower than those of basal leaves, narrowly cuneate, 1–2(–3.5) × 0.8–2(–2.5) cm, apex rounded to obtuse.
solitary flowers at stolon nodes.
1–7-flowered.
(1–)3–10(–17) cm.
0.5–1(–2) cm.
4(–5)-merous;
epicalyx bractlets narrowly elliptic to oblong or ovate, 3–4(–7) × 1–1.5 mm, smaller than to slightly larger than sepals;
hypanthium 2–4 mm diam.;
sepals (3–)4–6 mm, apex broadly acute or acuminate;
petals 6–9 × 5–9 mm, apex ± retuse;
stamens 15–20, filaments 0.8–1.2 mm, anthers 0.8–1.2 mm;
carpels 20–50, styles 0.9–1.5 mm.
epicalyx bractlets ovate-elliptic, 1–2.5 × 1–1.5 mm;
hypanthium 2–3 mm diam.;
sepals 2.5–4 mm, apex obtuse;
petals ± paler abaxially, bright yellow adaxially, ± obcordate, 3–7 × 2.5–4 mm;
filaments 1.3–2 mm, anthers 0.5 mm;
carpels 5–12, styles 2–2.5 mm.
1–1.5(–1.8) mm, ± smooth.
1.5–1.8 mm, smooth to lightly rugose.
± erect, stout to slender, 1–4 cm.
hairs not well differentiated from long hairs, absent or sparse throughout.
= 28, 56 (Europe).
Potentilla anglica
Potentilla demotica
Potentilla anglica apparently is a product of hybridization involving P. erecta and P. reptans (B. Matfield and J. R. Ellis 1972) that has become stabilized and distinct from both parents. In Europe, it forms back-cross hybrids with both P. erecta (P. ×suberecta Zimmeter) and P. reptans (P. ×mixta Nolte); these hybrids are not known from North America. A garden hybrid supposedly between P. anglica and P. nepalensis Hooker (known as P. ×tonguei Mallett) was found in Allegany State Park, New York, but this was likely cultivated rather than naturalized.
Potentilla anglica probably was introduced even in Newfoundland (A. Kurtto et al. in J. Jalas et al. 1972+, vol. 13), contrary to the view expressed by M. L. Fernald (1950).
The name Potentilla procumbens Sibthorp was previously used for this species; that is a superfluous and illegitimate name.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Potentilla demotica is known from a single granitic knoll in the Hualapai Mountains, Mohave County. The species was reported as a western range extension of P. subviscosa by M. Butterwick et al. (1991); it differs in rock-dwelling habit, petal color, and epicalyx, among other characters.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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