Sulphur Buttercup - Ranunculus sulphureus
Stems erect, 3–20 cm with glabrate foliage. Basal leaf blades reniform, 1–3 cm long, 3- to 5-lobed . Flowers with petals 8–12 mm long, ca. twice as long as the sepals. Achenes glabrous or sparsely brown-hairy, ca. 2 mm long with a curved or straight beak 1.5–2 mm long; heads cylindric, 5–8 mm high (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
Circumpolar south to AB, NT and Greenland (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus auricomus
, Bombus bifarius
, Bombus nevadensis
, and Bombus bimaculatus
(Macior 1968, Thorp et al. 1983).
- Literature Cited AboveLegend: View Online Publication
- Macior, L.M. 1968. Bombus (Hymenoptera, Apidae) queen foraging in relation to vernal pollination in Wisconsin. Ecology 49:20-25.
- Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., B. Christiaens, D. Hanna, L. Larsen, and C. Odegard. 2013. Noteworthy collection. Madroño 60(3): 262-263.