Potentilla sect. Rectae |
Rosaceae subfam. rosoideae |
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Habit | Perennials, 1-stemmed to ± tufted, not stoloniferous; taproots not fleshy-thickened, often giving rise to ± thickened lateral roots; vestiture of well-differentiated long and short hairs, glands common to abundant, not red. | Herbs, shrubs, or subshrubs. |
Stems | erect, not flagelliform, not rooting at nodes, from centers of ephemeral basal rosettes, 1.5–7 dm, lengths (2–)3–5 times basal or proximal cauline leaves. |
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Leaves | basal not in ranks; cauline (3–)5–9; primary leaves palmate, proximal ones 5–18 cm; petiole: long hairs spreading, stiff, glands common to abundant; leaflets 5–7, at tip of leaf axis, separate, oblanceolate, margins flat or ± revolute, ± whole length ± evenly incised 1/3–1/2 to midvein, teeth 7–17 per side, surfaces ± similar, green, not glaucous, long hairs stiff, cottony and/or crisped hairs absent. |
alternate, rarely opposite, pinnately compound, sometimes simple or palmately compound; stipules present, rarely absent. |
Inflorescences | (3–)7–60+-flowered, cymose, ± open. |
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Pedicels | straight in fruit, 0.5–2(–3) cm, proximal often much longer than distal. |
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Flowers | 5-merous; hypanthium 5–9 mm diam.; petals pale [to bright] yellow, obcordate, (4–)7–10(–13) mm, equal to or longer than sepals, apex retuse, rarely rounded; stamens 25–30; styles subapical, columnar-tapered, not or slightly papillate-swollen in proximal 1/3, 0.8–1.3 mm. |
torus usually enlarged, sometimes small or absent; carpels 1–260(–450), distinct, free, styles distinct, rarely connate (Roseae); ovules 1(or 2), collateral (Rubeae) or superposed (Fallugia, Filipendula). |
Fruits | achenes or aggregated achenes sometimes with fleshy, urn-shaped hypanthium or enlarged torus, sometimes aggregated drupelets; styles persistent or deciduous, not elongate (elongate but not plumose in Geum). |
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Achenes | strongly rugose. |
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x | = 7(8). |
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Potentilla sect. Rectae |
Rosaceae subfam. rosoideae |
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Distribution | Eurasia; n Africa [Introduced in North America; introduced also in South America, Pacific Islands (New Zealand), Australia] |
North America; Mexico; Central America; South America; West Indies; Bermuda; Eurasia; Africa; Atlantic Islands; Indian Ocean Islands; Pacific Islands; Australia |
Discussion | Species 8–14 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variation in the number of genera in subfam. Rosoideae is due to differences in generic delimitation between D. Potter et al. (2007) and the authors of some Potentilleae genera. Cyanogenic glycosides and sorbitol are absent in the subfamily. Tribes 6, genera 28–35, species ca. 1600 (6 tribes, 26 genera, 302 species, including 1 hybrid, in the flora) (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 141. | FNA vol. 9, p. 23. |
Parent taxa | ||
Subordinate taxa | ||
Synonyms | P. Rectae | |
Name authority | (Th. Wolf) Juzepczuk: in V. L. Komarov et al., Fl. URSS 10: 160. (1941) | Arnott: Botany, 107. (1832) |
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