Potentilla crinita |
Potentilla albiflora |
|
---|---|---|
bearded cinquefoil, Lemmon's cinquefoil |
Pinaleño cinquefoil, whiteflower cinquefoil |
|
Stems | (0.5–)1.5–4.5 dm, lengths 2–4(–5) times basal leaves. |
0.2–1.5 dm. |
Basal leaves | pinnate, 3–15(–20) cm; petiole 1–10(–15) cm, long hairs dense, appressed, 1.5–2.5 mm, usually stiff, short and crisped hairs usually absent, cottony hairs absent, glands sparse, often obscured; leaflets often conduplicate, lateral ones evenly paired, (3–)4–6(–7) per side on distal 1/3–2/3 of leaf axis, distal pairs ± decurrent, often confluent with terminal leaflet, larger leaflets narrowly cuneate or oblanceolate to obovate, 1–3(–4) × 0.2–0.8(–1) cm, distal 1/4–1/2(–2/3) or less of margin incised ± 1/4 or less to midvein, teeth (0–)1–5(–9) per side, 1–2 mm, surfaces ± similar to ± dissimilar, abaxial silvery to greenish, long hairs usually dense (at least on primary veins), 1–2 mm, stiff, short-crisped hairs absent or sparse, cottony hairs usually absent, glands sparse to common, often obscured, adaxial ± green, long hairs sparse to common, sometimes absent, short, crisped, and cottony hairs absent, glands sparse. |
ternate, 1.5–10 cm; petiole 1–7 cm, long hairs ± abundant, spreading to ascending, 0.5–1(–1.5) mm, weak to stiff, glands sparse to abundant; leaflets 3, central obovate, 0.5–2.5(–3.5) × 0.4–1.3(–2) cm, not to scarcely petiolulate, distal 1/2–2/3 of margins evenly incised ± 1/3 to midvein, teeth 3–5(–6) per side, surfaces green, long hairs ± abundant, 0.5–1 mm, glands sparse to abundant. |
Cauline leaves | 1–3(–4). |
|
Inflorescences | (5–)10–30-flowered. |
1–5(–10)-flowered. |
Pedicels | 0.5–2(–4) cm. |
0.5–2 cm. |
Flowers | epicalyx bractlets lanceolate, 1.5–4.5 × 0.5(–1) mm, 1/2–2/3 as long as sepals, abaxial vestiture similar to or ± sparser than sepals, not glabrescent, straight hairs common, crisped or cottony hairs usually absent; hypanthium 2.5–5 mm diam.; sepals (3–)4–7 mm, apex acute to long acuminate; petals (3–)4.5–7.5(–8) × 4–6 mm; filaments 1–3 mm, anthers 0.6–1.1 mm; carpels 5–20, styles 1.6–2.6 mm. |
epicalyx bractlets lanceolate-elliptic, (1.5–)2–3(–5) × 0.5–1.5 mm; hypanthium 3.5–6 mm diam.; sepals 3–6(–8) mm, apex acute; petals ± paler abaxially, bright yellow adaxially, narrowly obcordate, (3–)4–7(–8) × 3–5 mm; filaments 2–4 mm, anthers 0.5–1 mm; carpels 10–25, styles 2–3 mm. |
Achenes | 1.4–1.7 mm, smooth or slightly rugose. |
1.5 mm, smooth. |
Short | hairs not well differentiated from long hairs, absent or sparse throughout. |
|
Potentilla crinita |
Potentilla albiflora |
|
Phenology | Flowering summer. | Flowering May–Sep. |
Habitat | Dry meadows, pygmy conifer, oak, aspen, or montane conifer woodlands | Rocky slopes, open ground, in pine-oak and mixed conifer woodlands |
Elevation | 2000–2600 m (6600–8500 ft) | 1800–3200 m (5900–10500 ft) |
Distribution |
AZ; CO; NM; NV; UT
|
AZ |
Discussion | Potentilla crinita occurs mainly in the upper foothills and mountains from southern Nevada to south-central Utah, northern Arizona, and northwestern New Mexico and is disjunct to southwestern Colorado (Archuleta County). It tends to grow on somewhat drier, rockier sites than co-occurring species of Potentilla. The often conduplicate leaflets, falcate in outline, bear relatively few, small teeth. Two varieties are sometimes recognized, based on leaflet and vestiture characters that do not reliably coincide. Potentilla crinita can hybridize with P. hippiana where the two species overlap, in spite of ecological partitioning. N. H. Holmgren (1997b) noted the type of P. crinita may be such a hybrid. If correct, then P. lemmonii would be used for the species unless the name P. crinita were to be conserved with a conserved type. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Potentilla albiflora grows on the Pinaleño (Graham) Mountains in Graham County, with a few outlying collections known from the Mogollon Rim in Greenlee County and the Santa Catalina Mountains of Pima County. Contrary to the specific epithet, petals of living plants are yellow, not white; like those of many Potentilla species, they tend to fade in pressed material. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 164. | FNA vol. 9, p. 186. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Leucophyllae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae |
Sibling taxa | ||
Synonyms | Ivesia lemmonii, P. crinita var. lemmonii, P. lemmonii | |
Name authority | A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 41. (1849) | L. O. Williams: Bull. Torrey Bot. Club 61: 260. (1934) |
Web links |