Potentilla sect. Niveae (Rydberg) A. Nelson in J. M. Coulter and A. Nelson (Q4008)
Potentilla sect. Niveae is a taxon with the rank section within the genus Potentilla
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Potentilla sect. Niveae (Rydberg) A. Nelson in J. M. Coulter and A. Nelson
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Potentilla sect. Niveae is a taxon with the rank section within the genus Potentilla
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Statements
taxon/id/Potentilla sect. Niveae (Rydberg) A. Nelson
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Potentilla sect. Niveae (Rydberg) A. Nelson
Potentilla sect. Niveae
(Rydberg) A. Nelson
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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taproots not fleshy-thickened;
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vestiture of long, short, crisped, and/or cottony hairs, glands absent or sparse to common, sometimes red.
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Stems ascending to erect, not flagelliform, not rooting at nodes, lateral to persistent basal rosettes, 0.2–2.5 (–4.5) dm, lengths 1.5–5 times basal leaves.
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Leaves: basal rarely 2-ranked;
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primary leaves usually ternate, rarely palmate on same plant, (0.5–) 1–12 (–20) cm;
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petiole: long hairs sometimes absent, ± appressed to spreading, soft to stiff, glands absent or sparse to common;
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leaflets 3 (–5), at tip of leaf axis, separate to overlapping, usually obovate, sometimes elliptic, suborbiculate, or obtriangular, margins slightly to strongly revolute, rarely flat, distal (1/3–) 1/2 to nearly whole length evenly incised 1/4–3/4 to midvein, teeth (1–) 2–6 (–12) per side, surfaces ± to strongly dissimilar, abaxial gray to white, sometimes yellowish white or reddish, cottony-crisped hairs usually dense, glands absent or obscured, adaxial dark green to grayish white or yellowish white, sometimes reddish, not glaucous, long hairs soft to stiff.
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Inflorescences 1–7 (–15) -flowered, cymose, ± to very open, or solitary flowers.
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Pedicels straight in fruit, 0.4–6 (–10) cm, proximal often longer than distal.
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Flowers 5-merous;
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hypanthium (1.8–) 2.5–7 mm diam.;
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petals pale-yellow to yellow, ± obcordate, (3–) 4–10 (–15) mm, longer than sepals, apex retuse;
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styles subapical, narrowly columnar, tapered, or conic, usually papillate-swollen in proximal 1/5 or less, sometimes to proximal 1/3 (–1/2) or not at all, 0.7–1.2 (–1.5) mm.
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Achenes smooth or slightly rugose.
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1.5-5 times basal leaves
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more or less to very; very
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dark green
grayish white or yellowish white
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