Ranunculus occidentalis Nutt. var. occidentalis (R. hexasepalus Benson; R. nelsonii [DC.] Benson, R. occidentalis var. brevistylis Greene)
Perennial herb from a cluster of fibrous roots; stems 1 to several, erect or nearly so, 15-40 (60) cm tall, more or less hollow; plants variously hairy. Leaves: Basal broadly egg-shaped or semi-circular to kidney-shaped, the blades deeply three-lobed or parted, 1.5-5.5 cm long, 2-8 cm wide, the segments one to two times incised, the ultimate segments oblong or elliptic to oblanceolate or lanceolate, toothed, tips pointed to rounded, the stalks long, one to several times length of blade; stem leaves alternate, more deeply dissected, shorter-stalked, transitional to the three to seven parted lower bracts and entire upper bracts. Flowers: Inflorescences few- to many-flowered cymes terminal on main stem and branches; flower stalks to 10 cm long; receptacle smooth; petals five (6 -14), distinct, yellow, oblong to narrowly egg-shaped, 5-13 mm long, 1.5-8 mm wide, nectary on upper surface, the nectary scale smooth, almost 1 mm long; sepals 5, bent back 2-3 mm from base, early deciduous, greenish or pinkish-tinged, 4-7 mm long, 2-4 mm wide, long stiff-hairy; stamens 30 to 60; pistils 5 to 20. Fruits: Achenes, several to many in a hemispheric head 3-7 mm long, 5-9 mm wide, the achenes egg-shaped, 2.6-3.6 mm long, 1.8-3 mm wide, smooth, rarely stiff-hairy, margins prominent, not keeled; beaks persistent, lanceolate- to awl-shaped, somewhat flattened, 0.4-2.2 mm long, straight or curved (from Douglas et al., 1999). Photo by Rob Hagel.
Moist to mesic meadows, grassy slopes, coastal bluffs, shores, clearings, open forest from lowland to subalpine zones (Douglas et al., 1999).
Nitrogen-medium soils (Klinka et al., 1989).
Water-shedding or water-receiving sites (Klinka et al., 1989).
Shade intolerant (Klinka et al., 1989).
Early seral, herbaceous and grassy communities (Klinka et al., 1989).
Meadow communities or lawn conversions; borders (B. Costanzo, personal communication).
fruit ripening time
seed collection time
no seeds per kg
collection and abstraction
fruit seed dormancy treatment
additional info and photos
For more information and pictures, visit the E-Flora BC website at www.eflora.bc.ca.