226 NORTH AMERICAN FLORA [Volume 24 



more or less hispid; stipels subulate, minute; leaflets 7-19, lanceolate or ovate, 1.5-4 cm. long, 

 dark-green and glabrous above, paler and glabrous or sparingly pilose beneath, acute and 

 mucronate at the apex; racemes 3-5-flowered, 4-5 cm. long; peduncle, pedicels, and calyces 

 more or less hispid; calyx-tube 4—5 mm. long, the lobes deltoid-lanceolate, acuminate, about 

 5 mm. long; corolla 15—20 mm. long, purple or lilac; pod 5-6 cm. long, 10-12 mm. broad, 

 densely glandular-hispid, abruptly acuminate, 3-5-seeded. 



Type locality: Not given. 

 Distribution: North Carolina to Georgia. 



14. Robinia Rusbyi Wooton & Standley, Contr. 

 U. S. Nat. Herb. 16: 140. 1913. 



A shrub; branches puberulent when young, soon glabrous, red or brown; stipular spines 

 stout, straight, 5-15 cm. long; leaves about 15 cm. long; rachis slender, minutely puberulent 

 or glabrate, sulcate above; leaflets 11-17, oval or broadly oblong, rounded at both ends and 

 mucronate at the apex, minutely strigillose on both sides, 2-4 cm. long, 1.5-3.5 cm. wide; 

 racemes dense, 1 dm. long or less; peduncle, pedicels, and calyces hirsutulous and somewhat 

 glandular-hispid; calyx-tube 6 mm. long, the lobes lanceolate, acuminate, 6 mm. long; corolla 

 about 2 cm. long, rose-purple; pod 5-8 cm. long, 14-18 mm. wide, glabrous, abruptly acute, 

 4-8-seeded. 



Type locality: Fifteen miles east of Mogollon, New Mexico. 

 Distribution: Mogollon Mountains, New Mexico. 



15. Robinia neomexicana A. Gray, Mem. Am. Acad. 

 11.5:314. 1854. 



Robinia Rusbyi Wooton & Standley, Contr. U. S. Nat. Herb. 16: 140, in part. 1913. 



A shrub, 1-2 m. high; branches grayish-puberulent, in age reddish or purplish; stipular 

 spines mostly straight, 2-10 mm. long, puberulent; leaves 1-1.5 dm. long; rachis puberulent, 

 sulcate above; leaflets 9-15, elliptic-lanceolate, mostly acutish at each end, 1-3 cm. long, 

 5-15 mm. wide, bluish-green, rather firm, strigulose on both sides; stipels subulate, 1-1.5 mm. 

 long; racemes about 1 dm. long, the peduncle, pedicels, and calyces puberulent and glandular- 

 hispid; pedicels about 5 mm. long; calyx-tube 7-7 mm. long, the lobes lanceolate, acuminate, 

 7-8 mm. long; corolla rose-colored, about 15 mm. long; pod 6-8 cm. long, 8 mm. wide, hirsutu- 

 lous, but not glandular-hispid, gradually acute at each end, merely margined on the seed- 

 bearing suture, 4— 8-seeded. 



Ty - pe locality: Dry hills on the Mimbres, New Mexico. 

 Distribution: Southwestern New Mexico. 

 Illustration: Sargent, Man./. 473. 



16. Robinia luxurians (Dieek) Rydberg. 



Robinia neomexicana (A. Gray, Mem. Am. Acad. II. 5: 314, in part.* 1854); Porter & Coult. Sy.n. 



Fl. Colo. 23. 1874. 

 Robinia neomexicana luxurians Dieck; Goeze, Gard. Chron. III. 12: 669. 1892. 



A small tree, 6-8 m. high, or sometimes a shrub; branches puberulent or in the south- 

 western part of the range glandular-hispid (v. perglandulosa), becoming bright reddish-brown, 

 or when several years old gray ; stipular spines spreading or somewhat reflexed, mostly straight, 

 5-20 mm. long, puberulent; leaves 1-2 dm. long; rachis puberulent, sulcate above; leaflets 

 13-17, rather thick, oblong to oval, mostly rounded at each end, mucronate, 1.5-4 cm. long, 

 8-20 mm. wide, dark-green above, paler beneath, strigose-puberulent; stipels subulate, 1-2 

 mm. long; racemes about 1 dm. long; peduncle, pedicels, and calyces glandular-hispid and 

 puberulent; calyx- tube 7-8 mm. long, the lobes lanceolate, long-acuminate; corolla rose-pink. 



* Only as to the fruit collected by Bigelow and mentioned in the footnote. 



