This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of
Weeds of the U.S.
glandular or egland-ular; sparsely to densely pubescent, sometimes glabrous distally, canescent or not, trichomes dendritic.
erect, unbranched or branched basally and/or distally, (0.8-)1.3-5.7(-9.2) dm.
petiole 0.5-3.6 cm; blade 1- or 2-pinnate, ovate or oblong to oblanceolate in outline, 1-15 cm, lateral lobes (4-9 pairs), linear or oblanceolate to ovate, margins entire or dentate.
sessile or shortly petiolate; blade smaller distally, distal lobes often narrower, surfaces densely pubescent.
considerably elongated in fruit.
usually ascending to divaricate or horizontal, rarely descending (at 20-110º angle), straight or slightly recurved, 4-18 (-23) mm.
sepals spreading to ascending, yellow, purple, or rose, oblong, 0.8-2.6 mm, pubescent; petals (whitish or yellow), narrowly oblanceolate, 1-3 × 0.3-1 mm; median filaments 1-2.8 mm; anthers 0.2-0.4 mm.
erect to ascending, usually clavate, rarely broadly linear (wider distally), not torulose, 4-13(-17) × 1.2-2.2 mm; valves each with distinct midvein; septum not veined; ovules 16-40 per ovary; style obsolete, 0.02-0.2 mm, glabrous.
biseriate, reddish brown, oblong, 0.6-0.9 × 0.4-0.5 mm.
Subspecies 4 (4 in the flora): North America, n Mexico.