Prosopis articulata S. Watson

Neltuma articulata (S. Wats.) Britton & Rose
Prosopis articulata S. Wats. Proc. Am. Acad. 24; 48. 1889.
A tree, 4-10 m. high, or shrubby, the twigs piiberulent or glabrate. Stipular spines 2 cm. long or shorter; leaves puberulent or glabrous; petioles .0.5-3 cm. long; pinnae 1 pair; leaflets 6-20 pairs, linear to oblong, prominently veined, at least beneath, 4-10 mm. long, the apex rounded; peduncles 1-3 cm. long; racemes 2-5 cm. long; calyx glabious, about 1 mm. long; petals glabrous without, about 3 mm. long; stamens about 5 mm. long; style little longer than the stamens; legume 8-16 cm. long, mostly deeply constricted between the seeds, the joints mostly longer than broad, 5-7 mm. wide.
Type locality; Guaymas, Sonera.
Distribution; Sonera; Lower California and islands adjacent.

Neltuma pazensis Britton & Rose, sp. nov
Twigs slender, puberulent when young, armed with stipular spines about 6 mm. long. Petioles about 13 mm. long or shorter; pinnae 1 or 2 pairs; leaflets 10-15 pairs, puberulent, obtuse or rounded, strongly pinnately veined, mostly oblong to elliptic, 5-7 mm. long, but the upper ones obovate or suborbicular and only 2-3 mm. long; peduncles slender, 2-2.5 cm. long; racemes densely flowered, 4-5 cm. long; calyx scarcely 1 mm. long; petals 2.5 mm. long; stamens about twice as long as the petals; style equaling the stamens; immature legume about 2 dm. long and 8-9 mm. wide, narrowed at the base, short-stipitate, glandular-scurfy, undulate.
La Paz, Lower California, June 14, 1897, /. A^. Rose 1324.
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