Ranunculus orthorhynchus |
Ranunculus glacialis |
|||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bloomer's buttercup, straight-beak buttercup, swamp buttercup |
glacier buttercup |
|||||||||||||
Roots | sometimes fleshy and ± tuberous. |
|||||||||||||
Stems | nearly erect or decumbent, never rooting nodally, hispid, strigose, or glabrous, base not bulbous. |
erect or ascending from caudices, not rooting nodally, distally glabrous or brown-pilose, not bulbous-based. |
||||||||||||
Basal leaf | blades narrowly ovate to oblong or semicircular in outline, simple to 3-5-lobed or -foliolate, 2.8-12.5 × 2.5-14 cm, leaflets or segments undivided or 1-2x-lobed or -parted, ultimate segments circular to linear, margins dentate, crenate, or entire, apex rounded to narrowly acute. |
blades reniform to broadly triangular in outline, 3-foliolate or deeply 3-parted, 1-4 × 1.6-4.4 cm, leaflets or segments 1-2x-parted, ultimate segments elliptic to oblanceolate or almost linear, margins entire or occasionally with 1-2 teeth, apex rounded to obtuse. |
||||||||||||
Flowers | receptacle hispid; sepals reflexed 1-2 mm above base, 5-11 × 2-4 mm, hispid, hirsute, or glabrous; petals 5-6, abaxially yellow or red, adaxially yellow, 8-18 × 4-11 mm. |
receptacle glabrous or brown-pilose; sepals spreading, 7-12 × 4-9 mm, brown-pilose; petals initially white, usually becoming red with age, 9-15 × 7-14(-18) mm. |
||||||||||||
Heads of achenes | hemispheric to ovoid, 5-13 × 6-10 mm; achenes 2.8-4.5 × 1.8-3.2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, narrowly lanceolate to subulate, straight, 1.8-3.8(-4.8) mm. |
|||||||||||||
Tuberous | roots absent. |
|||||||||||||
Fruiting | heads hemispheric, 5-8 × 7-16 mm; fruit wall smooth, not veined, loose but not inflated, winged along suture, fruits winged achenes; achenes 2.6-3 × 1.4-2 mm, glabrous; beak persistent, lanceolate, 0.8-2.3 mm. |
|||||||||||||
Ranunculus orthorhynchus |
Ranunculus glacialis |
|||||||||||||
Distribution |
AK; CA; ID; MT; NV; OR; UT; WA; WY; BC
|
AK; Eurasia |
||||||||||||
Discussion | Varieties 3 The first two varieties (Ranunculus orthorhynchus var. orthorhynchus and R. orthorhynchus var. platyphyllus) are rather weak, intergrading extensively in California and Oregon. By contrast, R. orthorhynchus var. bloomeri often grows with the others with little or no intergradation (although intermediate populations are found in some areas), and it has been treated as a distinct species, R. bloomeri, by many taxonomists. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (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. Crymodes | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Beckwithia glacialis | |||||||||||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 21. (1829) | Linnaeus: Sp. Pl. 1: 553. (1753) | ||||||||||||
Web links |
|