Errazurizia megacarpa (S. Watson) I. M. Johnst.

Psorobatus megacarpus (S. Wats.) Rydberg
Dalea megacarpa S. Wats. Proc. Am. Acad. 20: 359. 1885.
A shrub, less than 1 m. high; branches white-tomentose and conspicuously glandularpustulate with light-brown glands; leaves 5-S cm. long; stipules subulate, 1-2 mm. long, becoming spinescent; rachis white-tomentose and with scattered glands; leaflets 9-13, suborbicular or round-oval, or the terminal one obcordate, more or less retuse at the apex, 5-S mm. long, white-tomentose on both sides or greener above, glandular-dotted beneath; spikes subsessile or short-penduncled, 5-15 cm. long, nearly 1 cm. thick, dense; bracts filiform-subulate, 4-5 mm. long, tipped with a gland, deciduous; flowers ascending; calyx white-tomentose, with a few scattered glands; tube campanulate, 3-4 mm. long, scarcely ribbed; lobes 2 mm. long, oblong, obtuse; petals yellow, turning brown, all distinct, almost clawless, the banner broadly obovate, slightly retuse, 7 mm. long, the other petals narrowly oblanceolate, 6 mm. long; stamens 9, alternately longer and shorter; pod ellipsoid, about 1 cm. long, with a short beak, tomentose and with numerous glands.
Type locality: Northern Sonora. Distribution: Sonora and Lower California.