Difference between revisions of "Ranunculus subg. Oxygraphis"
Amer. J. Bot. 27: 806. 1940.
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Revision as of 22:11, 16 December 2019
Plants glabrous. Stems erect from short caudices or rhizomes, stolons absent, not bulbous-based, without bulbils. Roots from rhizome only, never tuberous. Leaves all basal, simple, petiolate; blades undivided, unlobed, margins entire or serrulate. Inflorescences terminal, solitary flowers. Flowers: sepals persistent in fruit, 5; petals 9-18, yellow, 7-12 mm; nectary scale attached basally, forming low ridge not covering nectary, glabrous, free margin entire; style present. Fruits achenes, 1-locular; achene body ellipsoid, about as wide as thick, not prolonged beyond seed; wall membranous, loose and ± inflated, with 1-2 longitudinal veins on each face; margin narrow ridge; beak 0.8-1.4 mm, shorter than achene body.
Distribution
North America, Asia.
Discussion
Species 5 (1 in the flora).
Selected References
None.