Part 1, 1919] FABACEAE: PSORALEAE 35 



Racemes short; style pubescent, straight, without a gland; pods 5-S mm. 

 long; seed filling the entire pod; leaves 0.9-1.2 cm. long; leaflets 9-13, 

 2—2.5 mm. long, much thickened. 10. E. parvifolia. 



Calyx Irregular, in fruit flaring from the base; slit between posterior lobes ex- 

 tending nearly to the base ; anterior lobes much longer than posterior. 

 Leaves 8-10 cm. long; leaflets 35-45, 8-12 mm. long; bracts deciduous be- 

 fore anthesis; pods 14—16 mm. long, 4.5-5 mm. wide, thin, glabrous, con- 

 spicuously punctate ; seed flat, filling less than half the length of the pod. 11. E. punctata. 

 Leaves 1.5-4.5 cm. long; leaflets 9-25, 3-6 mm. long; bracts persisting until 

 after anthesis; pods 5-7 mm. long, 2-3 mm. wide, thickened, pu- 

 bescent, obscurely punctate; seed thick, filling the entire pod. 

 Leaflets 21-25, pubescent above; racemes 6-9 cm. long; bracts persist- 

 ing until after anthesis, but deciduous before fruit matures; gland 

 on style short, thick; pods not ridge-veined, pale-brown; seed less 



turgid, smooth on each face, pale-brown. 12. E. schizocalyx. 



Leaflets 9-17, nearly glabrous above; racemes 1-5 cm. long; bracts 

 more or less persistent until fruit matures; gland on style minute 

 or none. 

 Leaflets 9-11,4-5 mm . long , firm ; racemes 2-5 cm . long ; style appar- 

 ently with a small gland; mature pod not known. 13. E. peninsularis. 

 Leaflets 13-17, 3-4 mm. long, slightly thickened; racemes 1-3 cm. 

 long; style without a gland; pods ridge-veined, dark-brown; 

 seed turgid, ridged on each face, dark -brown. 14. E. spinosa. 



I 



1. Eysenhardtia orthocarpa (A. Gray) S. Wats. Proc. Am. Acad. 

 17: 339. 1882. 



Evsenhardtia amorphoides orthocarpa A. Grav, PI. Wright. 2: 37. 1853. 

 V'iborquia orthocarpa Cockerell, Bull. Am. Mus. Nat. Hist. 24: 97. 1908. 



A much branched shrub or small tree, 3-5 m. high; stems grayish-brown, the young growth 

 canescent with whitish ascending incurved hairs; leaves 5-15 cm. long, spreading; stipules 

 2-3 mm. long, subulate; stipels bristle-like, from a broad base, reddish, less than 1 mm. long, 

 shorter than the petiolules, soon deciduous; leaflets 21-41, oblong, 10-20 mm. long, dull- 

 green above, paler beneath, pubescent on both surfaces, especially beneath, punctate beneath 

 with minute dark dots, faintly reticulate above, membranous; racemes 5-10 cm. long; bracts 

 1-2 mm. long, lanceolate, brown, pubescent, deciduous much before anthesis; calyx-tube 2—3 

 mm. long, glandular-dotted, finely pubescent, ridged, split slightly more deeply on the posterior 

 side; lobes 0.4-0.8 mm. long, acute, nearly uniformly pubescent; petals 5-7 mm. long, membra- 

 nous, more than twice as long as the calyx, the standard broad, notched ; style 4—5 mm. long, 

 slightly pubescent, slightly upcurved at the apex, the gland at the curve large, conspicuous; 

 pods 10-13 mm. long, 2.5-3 mm. wide, thin, greenish-brown, glabrous, slightly upcurved at 

 the apex, inconspicuously punctate distally with small glands, at maturity reflexed-spreading, 

 on pedicels about 1 mm. long; seed filling two fifths to one half the length of the pod, 4.8-5.3 

 mm. long, oblanceolate, flat, smooth, olive-brown, with a narrow basal lobe. 



Type locality: Mountains at Guadalupe Pass, near San Bernardino, Sonora. 

 Distribution: Rocky canons, in the mountains of southeastern Arizona, Sonora, and Chihua- 

 hua, at elevations of 1350-1750 meters. 

 Illustration: Sarg. Silva pi. 110. 



2. Eysenhardtia polystachya (Ortega) Sarg. Silva 3: 29. 1892. 



Viborquia polvstachya Ortega. Dec. 66. 1798. 



Eysenhardtia amorphoides H.B.K. Nov. Gen. & Sp. 6: 491. 1824. 



Varennea polvstachva DC. Prodr. 2: 522. 1825. 



Wiborgia amorphodes Kuntze, Rev. Gen. 213. 1891. 



? Psoralea slipularis Sesse & Moc. Fl. Mex. ed. 2. 169. 1894. 



A much branched shrub or tree, 3-8 m. high; stems grayish-brown, glabrous, the young 

 growth canescent with whitish ascending appressed hairs; leaves 3-8 cm. long, spreading; 

 stipules 2-3 mm. long, subulate; stipels subulate, brown, 0.7-1.2 mm. long, equaling the peti- 

 olules, more or less persistent; leaflets 31-51, oblong, 3-10 mm. long, dull-green above, paler 

 beneath, pubescent on both surfaces, especially beneath, punctate beneath with minute brown- 

 ish dots, faintly reticulate above, membranous; racemes 4—14 cm. long; bracts 2-4 mm. long, 

 lanceolate, pale-brown, pubescent, deciduous before anthesis; calyx-tube 2-2.5 mm. long, 

 strongly glandular-dotted, pubescent, faintly ridged, split slightly more deeply on the posterior 

 side; lobes 0.2-0.5 mm. long, rounded to acutish, pubescent, ciliate; petals 5-7 mm. long, mem- 



