Ranunculus testiculatus |
Ranunculus lapponicus |
|
---|---|---|
bur buttercup, hornseed buttercup, tubercled crowfoot |
Lapland buttercup, renoncule de lapponie |
|
Stems | erect or ascending, not rooting nodally, villous, not bulbous-based. |
prostrate, buried, rooting nodally, glabrous, not bulbous-based. |
Basal leaf | blades broadly spatulate in outline, 1-2x-dissected, 0.9-3.8 × 0.5-1.5 cm, segments linear, margins entire, apex obtuse to acuminate. |
blades reniform, deeply 3-parted, 1.1-2.6 × 1.6-4.3 cm, segments undivided or 1x cleft, margins crenate, apex rounded. |
Flowers | receptacle glabrous; sepals spreading, 3-6 × 1-2 mm, villous; petals yellow, 3-5 × 1-3 mm. |
receptacle glabrous; sepals spreading or reflexed from base, 4-7 × 2-5 mm, glabrous; petals yellow, 5-6 × 2-3 mm. |
Heads of achenes | cylindric, 9-16(-27) × 8-10 mm; achenes 1.6-2 × 1.8-2 mm, tomentose; beak persistent, lanceolate, 3.5-4.5 mm. |
hemispheric, 5-7 × 8-10 mm; achenes 3.8-4.2 × 2-2.2 mm, glabrous; beak persistent, lanceolate, curved, tip hooked, 1.6-2.4 mm. |
Tuberous | roots absent. |
roots absent. |
2n | = 16. |
|
Ranunculus testiculatus |
Ranunculus lapponicus |
|
Phenology | Flowering spring (Apr–May). | Flowering late spring–summer (Jun–Jul). |
Habitat | Disturbed areas, especially in grassland | Boggy places and lakesides in tundra, muskeg, and boreal forest |
Elevation | 400-2500 m (1300-8200 ft) | 0-900 m (0-3000 ft) |
Distribution |
AZ; CA; CO; IA; ID; KS; MN; MO; MT; ND; NE; NM; NV; OH; OR; SD; UT; WA; WY; BC; SK; native to Eurasia [Introduced in North America]
|
AK; ME; MI; MN; AB; BC; MB; NB; NF; NT; ON; QC; SK; YT; Greenland; Eurasia
|
Discussion | In North America, Ranunculus testiculatus seems to be expanding its range rapidly in arid and semiarid areas. A second species of this subgenus, R. falcatus Linnaeus [Ceratocephala falcata (Linnaeus) Persoon], has been reported from North America, but all reports seem to be based on misidentified material of R. testiculatus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Starving individuals among western Eskimo groups ate the soaked plant of Ranunculus lapponicus as a dietary aid before consuming other food (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ceratocephala | Ranunculaceae > Ranunculus > subg. Coptidium |
Sibling taxa | ||
Synonyms | Ceratocephalus orthoceras, Ceratocephalus testiculatus | |
Name authority | Crantz: Stirp. Austr. Fasc. 2: 97. (1763) | Linnaeus: Sp. Pl. 1: 553. (1753) |
Web links |