Ranunculus canus |
Ranunculus macranthus |
|||||
---|---|---|---|---|---|---|
Hartweg's buttercup, Sacramento Valley buttercup |
large buttercup, showy buttercup, smallflower buttercup |
|||||
Roots | never tuberous. |
tuberous. |
||||
Stems | erect to decumbent, never rooting nodally, hirsute, pilose, or glabrous, base not bulbous. |
erect or decumbent, never rooting nodally, hispid, base not bulbous. |
||||
Basal leaf | blades ovate to narrowly ovate in outline, 3-parted or -foliolate, 3.3-9.5 ×3.5-9.4 cm, leaflets or segments 1-3x-lobed, ultimate segments ovate or oblong-ovate to lanceolate, margins toothed, apex acute or obtuse. |
blades ovate in outline, 3-5-foliolate, 3.8-10 × 2.7-9 cm, leaflets 1x-lobed, ultimate segments narrowly elliptic to oblanceolate, margins entire or with few teeth, apex broadly acute to rounded-obtuse. |
||||
Flowers | receptacle glabrous; sepals reflexed 1-2 mm above base, 3-8 × 2-4 mm, hirsute; petals 5-17, yellow, 6-12 × 3-6 mm. |
receptacle hispid; sepals spreading or weakly reflexed ca. 1 mm above base, 7-10 × 3-5 mm, hispid; petals 10-22, yellow, 12-22 × 4-9 mm. |
||||
Heads of achenes | hemispheric to globose, 6-9 × 7-10 mm; achenes 3.4-4.4 × 2.4-3.6 mm, glabrous or rarely hispid, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, deltate or lance-deltate, curved, 0.2-1.2 mm. |
globose to cylindric, 8-14 × 8-10 mm; achenes 2.2-4.2 × 2.8-3.4 mm, glabrous, margin forming narrow rib 0.4-0.6 mm wide; beak usually persistent, filiform from deltate base, straight, 2-4 mm. |
||||
2n | = 32. |
|||||
Ranunculus canus |
Ranunculus macranthus |
|||||
Phenology | Flowering late winter–spring (Mar–May). | |||||
Habitat | Riverbanks and wet meadows | |||||
Elevation | 0-400 m (0-1300 ft) | |||||
Distribution |
CA
|
TX
|
||||
Discussion | Varieties 2 (2 in the flora). Ranunculus canus intergrades with R. occidentalis var. occidentalis and R. californicus, and some populations can be difficult to assign to species. The deltate or lance-deltate achene beak of R. canus, however, which is usually 0.8-1.2 mm wide at the base and less than 1.5 times as long as wide, contrasts with the narrower beaks of the other two species, which are usually less than 0.6 mm wide and at least twice as long as wide. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||
Key |
|
|||||
Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. fascicularis var. cuneiformis | |||||
Name authority | Bentham: Pl. Hartw., 294. (1849) | Scheele: Linnaea 21: 585. (1848) | ||||
Web links |