STANDLEY TEEES AND SHRUBS OF MEXICO. 1189 



10. Vincetoxicum reticulatum (Engelm.) Heller, Bot. Expl. Texas 79. 1895. 

 Gonolobus reticulatus Engelm.; A. Gray, Proc. Amer. Acad. 12: 75. 1876. 

 Nuevo Leon and San Imis Potosi; reported from Sonora. Western Texas 



to southern Arizona. 



Stems hirsute : leaves ovate-cordate, 4 to 10 cm. long, acuminate, hirsute ; um- 

 bels 5 to 9-flowered; corolla green, with purplish venation, the lobes obtuse; 

 follicles 7 to 12 cm. long, muricate. 



11. Vincetoxicum velutinum (Schlecht. ) Standi. 

 Gonolohus velutinus Schlecht. Linnaea 13: 521. 1833. 

 Veracruz ; type from Jalapa. 



Stems hirsute and puberulent ; leaves rounded-cordate, 4.5 to 13.5 cm. long, 

 rounded to short-acuminate at apex, velutinous ; peduncles few-flowered, the 

 flowers greenish. 



12. Vincetoxicum. suberiferum^ (Robinson) Standi. 



Gonolohus suberiferus Robinson, Proc. Amer. Acad. 27: 181. 1892. 



Type from San Jose Pass, San Luis Potosi. 



Stems woody, covered with pale yellowish corky bark, hirsute when young; 

 leaves ovate, 8.5 to 5 cm. long, acuminate, pubescent ; peduncles 1-flowered ; 

 corolla 3 cm. broad, the lobes ovate, obtuse ; follicles slender, smooth, 7.5 cm. 

 long or more. 



13. Vincetoxicum congestum (Decaisne) Standi. 

 Gonolohus congest us Decaisne in DC. Prodr. 8: 597. 1844. 

 Jalisco to Oaxaca ; type from Oaxaca, altitude 1,500 meters. 



Stems hirsute ; leaves ovate-cordate, 4 to 11 cm. long, acute or acuminate, 

 pilose ; cymes dense, few-flowered, subsessile ; corolla about 1 cm. broad, the 

 lobes deltoid-ovate. 



Gonolohus sidaefolius Mart. & Gal.,^ described from Veracruz, may be a 

 synonym. 



14. Vincetoxicum triflorum (Mart. & Gal.) Standi. 



Gonolobus triflorus Mart. & Gal. Bull. Acad. Brux. ll^: 365. 1844. 



Type from Petioles, Mixteca Alta, Oaxaca, altitude 1,950 meters. 



Stems pubescent ; leaves cordate-ovate or ovate-lanceolate, acuminate, pu- 

 bescent ; peduncles 3-flowered, shorter than the petiole ; corolla greenish, tlie 

 lobes ovate-lanceolate. 



Perhaps a synonym of V. uniflorum. 



15. Vincetoxicum fuscum (Decaisne) Standi. 

 Gonolobus fuseus Decaisne in DC. Prodr. 8: 592. 1844. 



Type from Arumbaro, near Morelia, Michoacan, altitude 1,050 meters. 

 Stems hirtellous ; leaves ovate, attenuate at apex, appressed-pilose, or sub- 

 velutinous beneath ; peduncles shorter than the leaves. 



16. Vincetoxicum petiolare (A. Gray) Standi. 



Gonolobus petiolaris A. Gray, Proc. Amer. Acad. 21: 397. 1880. 



Chihuahua and Sinaloa ; tj^e from Batopilas, Chihuahua. 



Stems woody below, covered with corky bark, hirsute when young; leaves 

 ovate-cordate or oblong-cordate, 5 to 11 cm. long, acuminate, pubescent ; pe- 

 duncles few-flowered, equaling or shorter tb.an the petioles ; corolla about 

 13 mm. long ; follicles slender, smooth, 18 cm. long or less. 



'Bull. Acad. Brux. 11^: .367. 1844. 



