Ranunculus testiculatus |
Ranunculus andersonii |
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bur buttercup, hornseed buttercup, tubercled crowfoot |
Anderson's buttercup, pink buttercup |
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Stems | erect or ascending, not rooting nodally, villous, not bulbous-based. |
erect from short caudices, not 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 cordate in outline, ternately 1-2x-compound, 1.5-3.8 × 2.1-3.8 cm, leaflets 2-3x-parted, ultimate segments elliptic to linear, margins entire or with occasional teeth, apex obtuse to acuminate. |
Flowers | receptacle glabrous; sepals spreading, 3-6 × 1-2 mm, villous; petals yellow, 3-5 × 1-3 mm. |
receptacle hispid; sepals spreading, 9-15 × 5-9 mm, glabrous; petals pinkish white, 12-18 × 9-13 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. |
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Tuberous | roots absent. |
roots absent. |
Fruiting | heads globose or depressed-globose, 13-27 × 21-29 mm; fruit wall veined, inflated, not winged, fruits thus utricles; utricles 6-12 × 4-6 mm, glabrous; beak persistent, deltate or subulate from deltate base, 0.2-0.6 mm. |
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Ranunculus testiculatus |
Ranunculus andersonii |
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Phenology | Flowering spring (Apr–May). | Flowering spring (Apr–May). |
Habitat | Disturbed areas, especially in grassland | Slopes in sagebrush or pinyon-juniper woodland |
Elevation | 400-2500 m (1300-8200 ft) | 900-2300 m (3000-7500 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]
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AZ; CA; ID; NV; OR; UT
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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.) |
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Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ceratocephala | Ranunculaceae > Ranunculus > subg. Crymodes |
Sibling taxa | ||
Synonyms | Ceratocephalus orthoceras, Ceratocephalus testiculatus | Beckwithia andersonii, R. andersonii var. juniperinus, R. andersonii var. tenellus, R. juniperinus |
Name authority | Crantz: Stirp. Austr. Fasc. 2: 97. (1763) | A. Gray: Proc. Amer. Acad. Arts 7: 327. (1867) |
Web links |