STANDLEY TEEES AND SHRUBS OF MEXICO, 1193 



Branchlets retrorse-pilose or puberulent ; leaves oblong-ovate or lance-oblong, 

 4 to 9 cm. long, acuminate, sparsely or densely pubescent beneath ; peduncles 

 short, few-flovi'ered ; corolla greenish, reticulate-veined ; fruit ovoid, coarsely 

 muricate. 



38. Vincetoxicum jalisoense (Robins. & Greenm.) Standi. 



Oonolobus jaliscensis Robins. & Greenm. Proc. Amer. Acad. 29: 389. 1894. 



Jalisc© to Morelos; type from Guadalajara. 



Stems retrorse-pubescent ; leaves oblong or ovate-oblong, 3 to 7 cm. long, 

 acuminate, cordate or truncate at base, densely pubescent beneath ; peduncles 

 very short, few-flowered; corolla yellowish green; follicles fusiform, striate. 



89. Vincetoxicum xanthotrichum (T. S. Brandeg.) Standi. 



Gonolobus xanthotrichus T. S. Brandeg. Zoe 5: 251. 1908. 



Veracruz and Oaxaca ; type from Zacuapan, Veracruz. 



Stems densely hirsute ; leaves short-petlolate, oblong-obovate, 8 to 11 cm. long, 

 abruptly acuminate, rounded or shallowly cordate at base, hirsute ; umbels 

 sessile or subsessile, the pedicels long and slender; corolla about 1 cm. long, 

 hirsute outside, barbate in the throat. 



DOUBTFUL SPECIES. 



GoNOLOBUs ALTATENSis T. S. Brandeg. Zoe 5: 244. 1908. Type from Altata, 

 Sinaloa. 



GoNOLOBUS GRACILIS Decaisue in DC. Prodr. 8: 596. 1844. Type from Oaxaca. 



Gonolobus inconspicuus T. S. Brandeg. Univ. Calif. Publ. Bot. 3: 387. 1909. 

 Type from Puebla. 



Vincetoxicum ateocoeonatum T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 372. 

 1917. Type from Barranca de las Pilas, Puebla. 



Vincetoxicum chiapense T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 190. 1915. 

 Type from Cerro del Boquerfin, Chiapas. 



Vincetoxicum megacarphum T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 381. 

 1913. Type from Bancs del Carrizal, Veracruz. 



Vincetoxicum pueblense T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 91. 1910. 

 Type from Puebla. 



23. HIMANTOSTEMMA A. Gray, Proc. Amer. Acad. 20: 294. 1885. 

 A single species is known. 



1. Himantostemma pringlei A. Gray, Proc. Amer. Acad. 20: 294. 1885. 



Baja California and Sonora ; type collected south of Altar, Sonora. 



Vine, woody below, the stems hirtellous ; leaves long-petiolate, ovate-cordate 

 or deltoid cordate, 2 to 4.5 cm. long, acute, hirtellous and puberulent ; peduncles 

 short, mostly 2-flowered; calyx lobes linear-lanceolate; corolla rotate, 7 to 8 

 mm. long, 5-parted, brown-purple, the lobes lanceolate, covered within with 

 numerous long linear-spatulate hairs ; corona simple, of 10 long linear stipitate 

 scales and of 5 short ones ; follicicles about 8 cm. long, 1.5 to 2 cm. thick, 

 glabrous, covered with long spinelike appendages. 



24. UBOSTEPHANUS Robins. & Greenm. Amer. Journ. Sci. III. 50: 159. 1895. 



The genus consists of a single species. 



1. Urostephanus gonoloboides Robins. & Greenm. Amer. Journ. Sci. III. 50: 

 159. 1895. 



Type collected on hills near Oaxaca, altiude 1,800 meters. 



Stems scandent, chiefly herbaceous, fulvous-hirsute ; leaves ovate-cordate, 4 

 to 6.5 cm. long, acuminate, hirsute, slender-petiolate ; cymes umbelliform, sub- 



