Leucaena lanceolata S. Watson

Leucaena lanceolata S. Wats. Proc. Am. Acad. 21: 427. 1886
A shrub, about 1.6 m. high, the twigs and leaves finely pubescent. Pinnae 2-5 pairs, slender-stalked; petiole 2-4 cm. long, bearing a low-conic gland about 1 mm. in diameter below the lower pinnae ; leaflets 3-7 pairs, lanceolate or the lower ones ovate, acute or short-acuminate, 2-4 cm. long; rachilla slender, bearing a small orbicular gland below the upper pair of leaflets; pedimcles ratlier stout, glabrate, 2-5 cm. long; involucre short, appressed to the base of the head; bractlets orbicular, ciliolate; flowers glabrous; calyx about 2 mm. long; petals about 4 mm. long; stamens about 9 mm. long; anthers pubescent.
Type LOCALiri": Hacienda San Miguel, Chihuahua. Distribution: Chihuahua; Sinaloa.