1180 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Lobes little if at all exceeding the corolla tube. 



Corolla throat densely barbate; leaves often acute or decurrent at base. 



3. M. edulis. 

 Corolla throat very sparsely or not at all barbate; leaves rounded or 

 subcordate at base. 

 Stamen scales exceeding the apical meuibrane of the anther. 



4, M. zimapanica. 



Stamen scales shorter than the membrane 5. M. macrophylla. 



Leaves pubescent beneath, usually densely so, even at maturity. 

 Leaves acute or acutish at base. 



Beak of the stigma about 1.5 mm. long; corolla greenish, with purple 



spots and stripes 6. M. trivirgulata. 



Beak about 0.7 mm. long; corolla purplish, striped with yellowish green. 



7. M. perafRnis. 

 Leaves rounded or cordate at base. 



Leaves soon glabrous on the iipper surface 8. M. propinqua. 



Leaves densely pubescent on the upper surface even in age. 

 Corolla glabi'ous outside. 



Stigma obtuse 9. M. bourgeana. 



Stigma pointed 10. M. coulteri. 



Corolla sparsely or densely pubescent outside. 



Corolla with appendages in the sinuses of the lobes ; calyx lobes 



linear, acute 11. M. gilgiana. 



Corolla not appendaged ; calyx lobes ovate, obtuse— 12. M. mexicana. 



1. Marsdenia parvifolia T. S. Brandeg. Zoe 5: 235. 1906. 

 Puebla and Oaxaca. 



Stems slender, fruticose, puberulent or glabrate; leaves short-petiolate, S to 

 15 mm. long, obtuse or subacute, rounded at base ; corolla lobes oblong, obtuse ; 

 style elongate. 



2. Marsdenia pringlei S. Wats. Proc. Amer. Acad. 25 : 158. 1890. 

 Nuevo Leon ; type collected in the Sierra de la Silla, near Monterrey. 

 Woody vine ; leaves slender-petiolate, oval to ovate-elliptic, 5 to 11 cm. 



long, abruptly acuminate, thin, glabrous ; umbels few or many-flowered, the 

 pedicels 3 to 8 mm. long; calyx lobes obtuse; coi'olla white, 7 to 10 mm. long, 

 glabrous. 



3. Marsdenia edulis S. Wats. Proc. Amer. Acad. 24: 61. 1889. 

 Sonora and Sinaloa ; type from Guaymas, Sonora. 



Stems woody, the larger ones with corky bark ; leaves slender-petiolate, 

 lance-ovate to oval, 4 to 13 cm. long, acuminate ; umbels many-flowered, sub- 

 sessile ; calyx lobes obtuse, ciliate ; corolla cream-colored, about 5 mm. long ; 

 fruit ovoid, smooth, 6.5 to 10 cm. long. " Talayote " (Sonora). 



The young fruit is eaten. One specimen from Sinaloa has the leaves mi- 

 nutely pubescent beneath and may represent a distinct species. 



4. Marsdenia zimapanica Hemsl. Biol. Centr. Amer. Bot. 2: 338. 1882. 

 Hidalgo, Puebla, and Oaxaca ; type from Zimapan, Hidalgo. 



Woody vine, glabrous or nearly so, the leaves sometimes pilose when young ; 

 leaves petiolate, elliptic-oblong to oval, acuminate ; umbels sessile or nearly 

 so, the flowers 8 to 10 mm. long ; calyx lobes obtuse ; corolla glabrous outside ; 

 stigma pointed. 



According to Flores, the plant is known in Hidalgo as " tequampatli " or 

 " tecuampatli," and the root is mixed with meat and used to poison coyotes. 

 The names may, however, apply rather to some, other plant. 



