Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Potentilla plattensis Nutt.
- Family: Rose (Rosaceae)
- Flowering: June-August
- Field Marks: This species has pinnately compound basal leaves with 7-17 leaflets. The flowers are yellow with petals 1/6-1/4 inch long.
- Habitat: Wet meadows, moist or dry prairies.
- Habit: Perennial herb with a thickened rootstock.
- Stems: Upright or lying flat, usually branched, up to 10 inches long, smooth or with
appressed hairs, sometimes reddish.
- Leaves: Basal and alternate, pinnately divided into 7-17 leaflets; leaflets obovate to oblong, up to 1/2 inch long, deeply lobed, smooth or with appressed hairs; stipules leafy, lanceolate, 1/4-1/2 inch long; basal leaves with stalks, stem leave
- Flowers: Few to several in an open cyme, each flower on a slender stalk, subtended by an oblong bract up to 1/10 inch long.
- Sepals: 5, green, united below to form a short floral tube, the lobes triangular to lanceolate, up to 1/6 inch long, with appressed hairs.
- Petals: 5, yellow, free from each other, up to 1/4 inch long.
- Stamens: 20.
- Pistils: Several, each with a superior ovary.
- Fruits: Achenes many, greenish to dark brown, smooth.
- Notes: The achenes are eaten by birds.
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