Potentilla biennis Greene (Q3962)
Potentilla biennis is a taxon with the rank species within the section Potentilla sect. Rivales
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| English |
Potentilla biennis Greene
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Potentilla biennis is a taxon with the rank species within the section Potentilla sect. Rivales
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Statements
taxon/id/Potentilla biennis Greene
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Potentilla biennis Greene
Potentilla biennis
Greene
FNA Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9: Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York.
accepted
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CA-AB
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CA-BC
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Douglas, G.W., G.B. Straley, D.V. Meidinger & J. Pojar. 1998. Illustrated Flora of British Columbia. B.C. Ministry of Environment, Lands & Parks and B.C. Ministry of Forests. Victoria. Crown Publications. 8 vols.
CA-SK
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CA-YT
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Cody, W.J. 2000. Flora of the Yukon Territory. 2nd ed. National Research Press, Ottawa. 669 pp.
CA-AB
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CA-BC
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CA-SK
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CA-YT
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US-AK
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US-AZ
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US-CA
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US-CO
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US-ID
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US-MT
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US-NV
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US-NM
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US-ND
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US-OR
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US-UT
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US-WA
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US-WY
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400–3100 m
400 meter
3,100 meter
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Stems ascending to erect, (1–) 2–6 (–8.5) dm, hairs at base not stiff, not tubercle-based, glands sparse to abundant, conspicuous (to 1 mm, septate).
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Leaves ternate, (2–) 4–12 (–25) cm;
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petiole (1–) 2–8 (–20) cm, long hairs sparse to common, spreading to ascending, 0.5–1.5 (–3) mm, weak, crisped hairs usually absent, glands sparse to abundant, conspicuous (to 1 mm, septate);
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leaflets 3, at tip of leaf axis, usually overlapping, largest ones mostly obovate or oval to nearly round, (0.5–) 1–3 (–4) × 0.3–3 (–3.5) cm, distal 3/4 to ± whole margin evenly to unevenly incised 1/4–1/3 (–1/2) to midvein, teeth 3–8 (–13) per side, surfaces sparsely to moderately hairy, rarely glabrate, glands sparse to abundant at least abaxially.
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Inflorescences (10–) 20–70+-flowered.
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Pedicels 0.2–1 (–2) cm.
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Flowers: epicalyx bractlets narrowly oblanceolate to narrowly obovate or elliptic, (1.5–) 2–3.5 (–4.5) × 0.5–1.5 (–2) mm;
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hypanthium (2–) 3–4 (–5.5) mm diam.;
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sepals (2–) 3–5 mm, apex broadly acute to obtuse;
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petals pale-yellow to yellow, broadly oblanceolate to obovate, (1–) 2–2.7 × 1.5 mm;
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stamens 10 or 15, filaments 0.5–1.2 mm, anthers 0.2–0.3 mm;
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carpels 40–100, styles 0.5–0.7 mm.
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Achenes whitish or pale yellowish, 0.5–0.9 mm, smooth, without a corky protuberance.
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incised
more or less; evenly to unevenly
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narrowly oblanceolate
narrowly obovate or elliptic
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