Difference between revisions of "Ranunculus rhomboideus"
Edinburgh J. Sci. 6: 329. 1822.
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|genus=Ranunculus | |genus=Ranunculus | ||
|subgenus=Ranunculus subg. Ranunculus | |subgenus=Ranunculus subg. Ranunculus | ||
Latest revision as of 22:51, 5 November 2020
Stems erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. Roots slender, 0.8-1.8 mm thick. Basal leaves persistent, blades ovate to rhombic, undivided or rarely innermost 3-parted, 1.1-5.3 × 0.9-3.6 cm, base obtuse, margins crenate with 5 crenae, apex rounded. Flowers: pedicels pilose; receptacle pilose; sepals 4-6 × 1.5-3 mm, abaxially pilose, hairs colorless; petals 5, 6-8 × 2-4 mm; nectary scale glabrous. Heads of achenes depressed-globose, 4-6 × 5-7 mm; achenes 1.8-2.2 × 1.2-1.8 mm, glabrous; beak slender, curved, 0.2-0.3 mm. 2n = 16.
Phenology: Flowering spring (Apr–Jun).
Habitat: Prairies, or occasionally open woods or thickets
Elevation: 0-900 m
Distribution
Alta., B.C., Man., N.W.T., Ont., Sask., Ill., Iowa, Mich., Minn., Mont., Nebr., N.Dak., S.Dak., Wis.
Discussion
In addition to the range given above, L. D. Benson (1948) cited nineteenth-century specimens from Quebec, New York, Massachusetts, and Rhode Island. No modern specimens have been seen from those areas.
Selected References
None.