11.
Descurainia pinnata
(Walter) Britton, Mem. Torrey Bot. Club. 5: 173. 1894.
Erysimum pinnatum
Walter, Fl. Carol. 174. 1788;
Sophia pinnata
(Walter) Howell
Annuals;
glandular or egland-ular; sparsely to densely pubescent, sometimes glabrous distally, canescent or not, trichomes dendritic.
Stems
erect, unbranched or branched basally and/or distally, (0.8-)1.3-5.7(-9.2) dm.
Basal leaves:
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.
Cauline leaves
sessile or shortly petiolate; blade smaller distally, distal lobes often narrower, surfaces densely pubescent.
Racemes
considerably elongated in fruit.
Fruiting pedicels
usually ascending to divaricate or horizontal, rarely descending (at 20-110º angle), straight or slightly recurved, 4-18 (-23) mm.
Flowers:
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.
Fruits
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.
Seeds
biseriate, reddish brown, oblong, 0.6-0.9 × 0.4-0.5 mm.
Subspecies 4 (4 in the flora): North America, n Mexico.
