Plant: annual, 2.5-13 dm, ± glabrous; Stem branched from upper nodes Leaves: 1-palmate, alternate; leaflets generally 5, 1.5-6 cm, linear to elliptic; petiole 5-45 mm INFLORESCENCE: raceme, terminal, generally 1-4 cm in flower, generally 5-40 cm in fruit; pedicels 4-20 mm Flowers: sepals fused in basal half, persistent, 1.6-2.6 mm, lanceolate, minutely dentate, yellow; petals 5-8 mm, oblong to ovate, yellow; stamens 10-20 mm, yellow, anthers 1.9-2.6 mm Fruit: 15-40 mm, 2-5 mm wide, ± round in transverse section, striate; receptacle 5-17 mm; Seeds 10-40 Misc: Dry, sandy flats, desert scrub, weedy roadsides; 1100-2400 m.; May-Aug References: Kearney & Peebles; Arizona Flora. McDougall; Seed plants of Northern Arizona. ASU specimans.