Blooms: April - June
Habit: herb
Duration: annual
Origin: Native
Distribution: Both sides of the Cascades, British Columbia south through Washington and Idaho to Baja California.
Habitat: Along streams and vernally moist slopes at low elevations.
Habit: herb
Duration: annual
Origin: Native
Distribution: Both sides of the Cascades, British Columbia south through Washington and Idaho to Baja California.
Habitat: Along streams and vernally moist slopes at low elevations.
Species Description:
General: Slender annual 1-4 dm. tall, simple or branched below, with stiff, spreading hairs throughout.
Leaves: Leaves alternate, petiolate, mostly cauline, the blade 2-6 cm. long and 2-5 cm. wide, two or three times pinnately dissected into small, narrow ultimate segments.
Flowers: Inflorescence of compound umbels, the rays of the primary umbels 1-9, 1-8 cm. long, ascending; the pedicels of the ultimate umbels short and unequal; involucre of several well-developed leaves; involucel of several entire or pinnatifid bractlets; calyx teeth 5; petals 5, white, obovate; styles 2, short.
Fruits: Fruit oblong, 3-7 mm. long, with hooked prickles along the ribs, those of alternate ribs larger.
General: Slender annual 1-4 dm. tall, simple or branched below, with stiff, spreading hairs throughout.
Leaves: Leaves alternate, petiolate, mostly cauline, the blade 2-6 cm. long and 2-5 cm. wide, two or three times pinnately dissected into small, narrow ultimate segments.
Flowers: Inflorescence of compound umbels, the rays of the primary umbels 1-9, 1-8 cm. long, ascending; the pedicels of the ultimate umbels short and unequal; involucre of several well-developed leaves; involucel of several entire or pinnatifid bractlets; calyx teeth 5; petals 5, white, obovate; styles 2, short.
Fruits: Fruit oblong, 3-7 mm. long, with hooked prickles along the ribs, those of alternate ribs larger.
Accepted Name:
Yabea microcarpa (Hook. & Arn.) K.-Pol.Synonyms:
Caucalis microcarpa Hook. & Arn.
Treated in Flora of the PNW as:
Caucalis microcarpa
Additional Resources:
PNW Herbaria Specimens: View list of Yabea microcarpa specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Yabea microcarpa specimens in the WTU Herbarium database.
Washington Flora Checklist: Yabea microcarpa treatment.
E-Flora BC: Yabea microcarpa atlas page.
CalPhotos: Yabea microcarpa images.
USDA Plants Database: Yabea microcarpa.
Diane Doss, 1995
Diane Doss, 1995
Clayton J. Antieau, 1990
Clayton J. Antieau, 1990
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
G. D. Carr, 2011
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 WA Native Plant Society |
