Flora of North America species comparison

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Ranunculus bonariensis var. trisepalus
Photo is of parent taxon

Carter's buttercup, vernal pool buttercup
Roots

not thickened basally, glabrous.
Stems

erect or decumbent, rooting at proximal nodes, glabrous.
Proximal cauline leaf blades

elliptic to ovate, 0.8-2.3 × 0.5-1.2 cm, base rounded or obtuse, margins entire to finely denticulate, apex broadly rounded-acute to rounded.
Inflorescences

bracts elliptic to ovate.
Flowers

receptacle glabrous;

sepals 3, spreading or reflexed from base, 1.5-3 × 0.5-2 mm, glabrous;

petals 1-3, 1.5-2.5 × 0.5-1 mm;

nectary scales glabrous.
Heads of achenes

globose to ovoid, 2-5 × 2-4 mm;

achenes 1.4-1.8 × 1-1.2 mm, smooth, glabrous;

beak absent.

Ranunculus bonariensis var. trisepalus
Phenology Flowering spring (Mar–May).
Habitat Vernal pools and edges of streams
Elevation 30-1000 m (100-3300 ft)
Distribution
from FNA
CA; South America
[BONAP county map]
Source FNA vol. 3.
Parent taxa Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Flammula > Ranunculus bonariensis
Synonyms R. trisepalus, R. alveolatus
Name authority (Gillies ex Hooker & Arnott) Lourteig: Darwiniana 9: 465. (1951)
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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