Ranunculus rhomboideus

Goldie

Edinburgh J. Sci. 6: 329. 1822.

Endemic
Treatment appears in FNA Volume 3.

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

V3 860-distribution-map.gif

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.

Lower Taxa

None.
... more about "Ranunculus rhomboideus"
Alan T. Whittemore +
Goldie +
Ranunculus sect. Marsypadenium +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Ill. +, Iowa +, Mich. +, Minn. +, Mont. +, Nebr. +, N.Dak. +, S.Dak. +  and Wis. +
0-900 m +
Prairies, or occasionally open woods or thickets +
Flowering spring (Apr–Jun). +
Edinburgh J. Sci. +
Ranunculus rhomboideus +
Ranunculus sect. Epirotes +
species +