1188 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3. Vincetoxicum lutescens Standi. 



Gonolobus luteolus Decaisne in DC. Prodr. 8: 593. 1844. Not Vincetoxicum 



luteolum Jord. & Fourr. 1866. 

 Type from Teapa, Tabasco. 



Leaves ovate-cordate, short-acuminate or attenuate, sparsely short-pilose or 

 glabrate; flowers subracemose ; sepals glabrous; corolla lobes ovate, acutish, 



4. Vincetoxicum cavanillesii Standi. 



Cynanchvm nigrum Cav. Icon. PI. 3: pi. 1/59, 1793. Not V incetomcum nigrum 

 Moench, 1794. 



Gonolobus niger K. Br. Mem. Wern. Soc. 1: 35. 1809. 



San Luis Potosi and Veracruz. 



Leaves ovate-cordate, 4 to 7.5 cm. long, acuminate or cuspidate-acuminate, 

 puberulent; inflorescence umbelliform, few-flowered, the flt)wers slender-pedi- 

 cellate; corolla blackish, the lobes obtuse, about 5 mm. long. 



5. Vincetoxicum. stenophyllum. Standi. 



Gonolobus lanceolatus Decaisne in DC. Prodr. 8: 598. 1844. Not Vincetoxi- 

 cum lanceolatum Kuntze, 1891. 



Veracruz ; type collected near the city of Veracruz. 



Stems retrorse-pilose ; leaves short-petiolate, lance-oblong or ovate-lanceolate, 

 5.5 to 8 cm. long, acuminate, densely velutinous-pubescent ; peduncles very 

 short, few-flowered; corolla about 2 cm. broad, the lobes rounded, green, 

 spotted with white. 



6. Vincetoxicum littorale (Decaisne) Standi. 

 Gonolobus littoralis Decaisne in DC. Prodr. 8: .590. 1844. 

 Type from sandhills near Veracruz. 



Stems hirtellous and pilose; leaves cordate, attenuate at apex, sparsely 

 pilose above, more densely so beneath ; peduncles shorter than the petioles, 

 few-flowered; corolla greenish, the lobes ovate-deltoid. 



7. Vincetoxicum diadematum (Edwards) Standi. 

 Gonolobus diadcmatus Edwards, Bot. Reg. 3: i)l. 252. 1817. 



Described from cultivated plants of Mexican origin; reported by Robinson 

 and Greennian ^ from Tepic. 



Stems fruticose, with corky bark, the young ones hirsute; leaves elliptic- 

 oblong, 5 to 7.5 cm. long or larger, acuminate, cordate at base, hirsute ; umbels 

 short-pedunculate, few-flowered ; corolla greenish yellow ; fruit 5-angulate. 



8. Vincetoxicum tingens (Decaisne), Standi. 

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

 Type from Zimapan, Hidalgo. 



Stems hirtellous; leaves ovate-cordate, acuminate, pubescent; peduncles 

 equaling the petioles; calyx lobes ovate, subotuse ; corolla lobes ovate, obtuse, 

 velutinous outside, green and fuscous. 



9. Vincetoxicum magnifolium (Pittier) Standi. 



Gonolobus magnifolius Pittier, Contr. U. S. Nat. Herb. 13: 104. f. IS. 1910. 



Oaxaca. Costa Rica; type from forests of Las Vueltas de Tucurrique. 



Large woody vine, the stems hirtellous and puberulent; leaves rounded-cor- 

 date, 13 to 24 cm. long, acute or acuminate, densely pubescent; cymes few- 

 flowered; calyx lobes broadly elliptic, 10 to 14 mm. long, obtuse; corolla 

 brownish or greenish, the lobes rounded-oval, rounded at apex. 



'Proc. Amer. Acad. 29: 389. 1894. 



