Lysiloma watsoni

Lysiloma watsoni Rose, Contr. U. S. Nat. Herb. 1: 99. 1891
A small tree, about 3 m. high, the twigs and leaf-rachis densely pilose. Petioles 1.5-2 cm. long, bearing a large conic gland; pinnae 4-8 pairs; leaflets 15-45 pairs, linear-oblong, 4-8 mm. long, chartaceous, obtuse, pubescent on both sides, the midvein nearly central; peduncles 3-4 cm. long; legume linear-oblong, 12-20 cm. long, 2-2.5 cm. wide, glabrous, acute, its stipe 1-2.5 cm. long; seeds oblong-oval, 9 mm. long.
Type locality: Alamos, Sonora. Distribution: Sonora.