Potentilla ovina

J. M. Macoun

Canad. Rec. Sci. 6: 464. 1896.

Common names: Sheep cinquefoil
Endemic
Basionym: Potentilla diversifolia var. pinnatisecta S. Watson Botany (Fortieth Parallel), 87. 1871
Synonyms: P. pinnatisecta (S. Watson) A. Nelson P. plattensis var. pinnatisecta (S. Watson) J. M. Macoun
Treatment appears in FNA Volume 9. Treatment on page 171. Mentioned on page 161, 168, 169, 172, 173.

Plants rosetted to ± matted; taproots sometimes ± fleshy-thickened. Stems prostrate to ascending, (0.3–) 0.8–2 (–3.5) dm, lengths (1–) 1.5–3 times basal leaves. Basal leaves pinnate with distal leaflets ± distinct, (1.5–) 2–10 (–13) × 0.7–3.5 (–5) cm; petiole 0.5–3.5 (–5) cm, straight hairs sparse to abundant, sometimes absent (var. decurrens), ± appressed to ascending, 1 mm, ± stiff, cottony hairs absent, glands sparse, often obscured; primary lateral leaflets 3–6 per side (often with additional interspersed leaflets), on distal 1/2–2/3 (–3/4) of leaf axis, ± separate to ± overlapping, largest ones narrowly cuneate-oblanceolate to ± obovate, (0.3–) 0.5–2 (–3.5) × (0.2–) 0.3–0.8 (–1) cm, distal 1/4 to whole margin unevenly to pinnately (at least distal leaflets of var. ovina) incised 1/2–3/4+ to midvein, ultimate teeth 2–9 (–11), linear or oblong to ovate, 1–7 (–9) × 1–2 mm, apical tufts 0.5–2 mm, surfaces green to grayish, not glaucous, straight hairs sparse to abundant (sparser adaxially), sometimes absent (except on margins), loosely appressed, 0.5–2 mm, ± stiff, cottony hairs absent, crisped hairs sometimes sparse to common, glands absent or inconspicuous. Cauline leaves 1–2. Inflorescences (1–) 2–11 (–20) -flowered, usually openly cymose. Pedicels (0.8–) 1–2 (–4) cm, straight to ± recurved in fruit. Flowers: epicalyx bractlets linear-lanceolate to narrowly elliptic, sometimes doubled, 2–3.5 (–5) × 1 mm; hypanthium 3–5 mm diam.; sepals 3.5–5.5 (–7) mm, apex acute to obtuse; petals 4–7 (–8) × 3.5–8 mm; filaments 1–2.5 mm, anthers 0.4–1 mm usually ± 1/2 as long as filaments; carpels 10–20, styles 2–3 mm. Achenes 1.5–2 mm, smooth, not carunculate.

Distribution

V9 248-distribution-map.jpg

Alta., B.C., Colo., Idaho, Mont., Nev., Oreg., Utah, Wyo.

Discussion

Varieties 2 (2 in the flora).

Potentilla ovina is here accepted as an implicit new name by J. M. Macoun for P. diversifolia var. pinnatisecta, in agreement with N. H. Holmgren (1997b). In contrast, B. C. Johnston (1980) considered the names heterotypic. Potentilla ovina has priority at the species rank over P. pinnatisecta by one month.

Selected References

None.

Key

1 Distal leaflets: ± whole margin pinnately incised 3/4+ to midvein, teeth 4–9(–11), linear, surfaces grayish, rarely green, hairs sparse to dense. Potentilla ovina var. ovina
1 Distal leaflets: distal 1/4–1/2(–3/4) of margin unevenly to pinnately incised 1/2–2/3(–3/4) to midvein, teeth 2–5(–7), ovate to oblong, surfaces green, hairs absent (except on margins) or sparse. Potentilla ovina var. decurrens

"dm" is not declared as a valid unit of measurement for this property.

... more about "Potentilla ovina"
not carunculate +
smooth +  and faintly rugose +
1.5mm +  and 2mm +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Barbara Ertter +
J. M. Macoun +
compound +  and simple +
Potentilla diversifolia var. pinnatisecta +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
less cordate or reniform +  and narrowly elliptic +
0.5 cm5 mm <br />0.005 m <br /> (25 cm250 mm <br />0.25 m <br />) +
reduced +
free +  and distinct +
hairy +  and glabrous +
Sheep cinquefoil +
10 cm100 mm <br />0.1 m <br /> (13 cm130 mm <br />0.13 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Alta. +, B.C. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wyo. +
not +  and aggregated +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
linear-lanceolate +  and narrowly elliptic +
1 cm10 mm <br />0.01 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
deciduous +
on style scar +, hairy +  and glabrous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
inconspicuous +  and obscured +
stoloniferous +  and short-rhizomatous +
straight +
sparse +  and dense +
less appressed +  and ascending +
sparse +  and common +
crisped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not differentiated +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cymose +  and (1-)2-11(-20)-flowered +
crassinucellate +
bipinnate +, odd-pinnate +, subpalmate +, palmate +  and ternate +
opposite +  and alternate +
marcescent +
well-developed +
persistent +
cauline +  and basal +
reduced +
not +  and overlapping +
oblanceolate +  and obovate oblong cuneate flabellate or elliptic +
linear +  and oblanceolate +
palmate +  and pinnate +
inferior +  and superior +
clustered +, biseriate +  and superposed +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
adnate +, free +, connate +  and distinct +
less separate +  and more or less overlapping +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
20 cm200 mm <br />0.2 m <br /> (32 cm320 mm <br />0.32 m <br />) +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
often not much longer +
Canad. Rec. Sci. +
not arillate +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
free +  and distinct +
not rooting +
reddish +  and green +
(1-)1.5-3 times basal leaves +
prostrate +  and ascending +
prostrate to decumbent +
1 +  and many +
not flagelliform +
palmate +  and pinnate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
deciduous +
distinct +
subapical +
papillate-swollen +  and filiform +
rough-thickened +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
green +  and grayish +
not glaucous +
P. pinnatisecta +  and P. plattensis var. pinnatisecta +
fleshy-thickened +
Potentilla ovina +
Potentilla sect. Multijugae +
species +
1 +  and 5 +
inconspicuous +
enlarged +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
biennial +, annual +  and perennial +
plant +  and matted +