Flora of North America species comparison

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Ranunculus occidentalis var. howellii
Photo is of parent taxon

western buttercup
Stems

erect to reclining, 1-3 mm thick, hirsute or sometimes glabrous.
Basal leaf blades

3-parted, ultimate segments narrowly elliptic, margins entire or dentate.
Flowers

sepals 5, 4-6 mm;

petals 5-6, 6-10 × 3-5 mm.
Achenes

3.4-4.8 × 2.6-3.2 mm, glabrous;

beak lanceolate, straight, 1.6-2.2 mm.

Ranunculus occidentalis var. howellii
Phenology Flowering spring–summer (Apr–Jul).
Habitat Meadows
Elevation 900-1400 m (3000-4600 ft)
Distribution
from FNA
CA; OR
[BONAP county map]
Discussion

Ranunculus occidentalis var. howellii, R. occidentalis var. dissectus, and R. austro-oreganus form a distinctive group distinguishable in the R. occidentalis complex by the straight achene beak. They may be difficult to separate, however; further study of their relationships is needed.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3.
Parent taxa Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus > Ranunculus occidentalis
Sibling taxa
R. occidentalis var. brevistylis, R. occidentalis var. dissectus, R. occidentalis var. hexasepalus, R. occidentalis var. nelsonii, R. occidentalis var. occidentalis, R. occidentalis var. ultramontanus
Name authority Greene: Pittonia 3: 14. (1896)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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