Ranunculus arvensis

Linnaeus
Sp. Pl. 1: 555. 1753.
Introduced
Synonyms: Ranunculus arvensis var. tuberculatus de Candolle
Treatment appears in FNA Volume 3.

Stems erect or ascending, sparsely pilose. Basal and lower cauline leaf blades obovate to rhombic in outline, 3-parted or 3(-5)-foliolate, 1.8-5.2 × 1.6-4.2 cm, leaflets oblanceolate or divided into oblanceolate or linear segments, leaflet base narrowly acuminate, margins entire or distally dentate, apex rounded or acuminate. Flowers pedicellate; receptacle sparsely hispid; sepals 5, spreading, 4-7 × 1-2 mm, strigose; petals 5, 5-8 × 2-4 mm. Heads of achenes discoid, 8-9 mm across; achenes 5-8 per head, 4-6.4 × 2.8-4.4 mm, faces and margin covered with long spines, glabrous; beak lance-subulate, straight, 1.6-3.8 mm.


Phenology: Flowering spring (Mar–Jun).
Habitat: Grasslands, ephemeral pools, disturbed areas
Elevation: 0-1200 m

Distribution

V3 78-distribution-map.gif

Introduced; Ark., Calif., D.C., Ga., Idaho, Ill., Kans., La., Miss., Mo., N.J., N.Y., N.C., Oreg., Pa., S.C., Tenn., Utah, Wash., South America, native to Eurasia, Pacific Islands, Australia.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Ranunculus arvensis"
Alan T. Whittemore +
Linnaeus +
Ark. +, Calif. +, D.C. +, Ga. +, Idaho +, Ill. +, Kans. +, La. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Oreg. +, Pa. +, S.C. +, Tenn. +, Utah +, Wash. +, South America +, native to Eurasia +, Pacific Islands +  and Australia. +
0-1200 m +
Grasslands, ephemeral pools, disturbed areas +
Flowering spring (Mar–Jun). +
W2 +  and Introduced +
Ranunculus arvensis var. tuberculatus +
Ranunculus arvensis +
Ranunculus sect. Echinella +
species +