familyRanunculaceae
genusRanunculus
subgenusRanunculus subg. Ranunculus
sectionRanunculus sect. Flammula
speciesRanunculus bonariensis
Ranunculus bonariensis var. trisepalus
Darwiniana 9: 465. 1951.
Basionym: Ranunculus trisepalus Gillies ex Hooker & Arnott Bot. Misc. 3: 133. 1834
Synonyms: Ranunculus alveolatus A. M. Carter
Treatment appears in FNA Volume 3.
Stems erect or decumbent, rooting at proximal nodes, glabrous. Roots not thickened basally, 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.
Phenology: Flowering spring (Mar–May).
Habitat: Vernal pools and edges of streams
Elevation: 30-1000 m
Distribution
Calif., South America.
Discussion
Selected References
None.
Lower Taxa
None.