Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
9. Ranunculaceae, the Buttercup Family
4. Ranunculus L. -- Buttercup, crowfoot
1. Ranunculus cardiophyllus Hook.
Erect, pilose to glabrate perennial with fibrous roots, 1.5-4 dm tall; stem
single, simple or branched above, 1- to several-flowered. Leaves basal
and cauline, the basal leaves with petioles 2-12 cm long, the previous year's
petioles often persistent at the base of the stem; blades of the basal leaves
simple, reniform to mostly ovate-cordate, 2-6 cm long, about as wide, crenate,
one or two sometimes shallowly to deeply cleft; cauline leaves few, subsessile
to sessile, deeply parted into several linear lobes. Sepals 5, yellowish,
often tinged with purple, spreading, 6-10 mm long, pilose dorsally, petaloid
on the margins; petals 5 or sometimes a few more, yellow, 8-15 mm long;
stamens 35-80; receptacle oblong-ovoid, 4-14 mm long in fruit,
hairy. Achenes 20-100 in an oblong-cylindric head 8-15 mm long, 7-9 mm
thick; achene body obovate, turgid with an inconspicuous margin, 1.5-2.5 mm
long, puberulent; beak straight or recurved at the tip, 0.5-1 mm long. Jun--Jul.
Seepage areas and in alpine meadows; uncommon in the Black Hills and with one
record from McKenzie Co., ND; (Sask. to N.W. Terr. and B.C., s to SD, NM, AZ
This plant is vegetatively similar to the early wood buttercup, Ranunculus
abortivus L., which is common in moist woods throughout the region, but
the flowers of R. cardiophyllus are much larger and showier.
Previous Species -- Myosurus minimus L.
Return to Family -- Ranunculaceae -
The Buttercup Family
Next Species -- Ranunculus cymbalaria Pursh
-- Seaside buttercup