102 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



Leaves and branches copiously pilose ; flowers usually tomentose. 

 Peduncles longer than the petioles. 

 Leaves copiously pilose, oval to ovate, deeply cordate at the base, obtuse or 



rounded and apiculate at the apex 1. S. mollis. 



Leaves glabrate, deltoid, subcordate at the base, long-acuminate at the apex. 



2. S. purpusii. 

 Peduncles equaling or usually shorter than the petioles. 

 Sheaths about one-fifth as long as the petioles or shorter. 



3. S. tomentosa. 



Sheaths one-fourth to half as long as the petioles 4. S. subpubescens. 



Leaves and branches glabrous or nearly so ; flowers glabrous. 



Staminate flowers small, 1.5 to 2 or rarely 3 mm. long; anthers equaling or 



longer than the filaments 5. S. mexicana. 



Staminate flowers large, 2.5 to 8 mm. long ; anthers usually shorter than the 

 filaments. 



Peduncles at anthesis shorter than the petioles 6. S. domingensis. 



Peduncles at anthesis longer than or equaling the petioles. 



Leaves glaucous beneath 7. S. glauca. 



Leaves green beneath. 



Peduncles about 5.5 cm. long, 5 to 6 times as long as the petiole. Fruit 



red 8. S. erythrocarpa. 



Peduncles rarely over 2 cm. long. 



Pedicels half as long as the flowers 9. S. densiflora. 



Pedicels equaling or much longer than the flowers. 



Leaves denticulate 10. S. moranensis. 



Leaves entire. 



Fruit red 11. S. medica. 



Fruit black. 



Younger branches with numerous stout spines; leaf blades 

 more or less triangular, nearly or quite as broad as long. 



12. S. bona-nox. 

 Younger branches unarmed or with few slender spines ; leaf 



blades not triangular, usually twice as broad as long. 



13. S. cordifolia. 



1. Smilax mollis Willd. Sp. PI. 4: 785. 1806. 



Smilax pringlei Greenm. Proc. Amer. Acad. 34: 567. 1899. 



Morelos to Veracruz, Tabasco, and Chiapas; typo from Jalapa, Veracruz. 

 West Indies, Central America, and northern South America. 



Leaves lanceolate to broadly cordate-oval. 8 to 15 cm. long, acute or abruptly 

 short-pointed, 5 or 7-nerved ; umbels long-pedunculate. " Bejuco de chiquihuite " 

 (Tabasco); ' zarzaparrilla "' (Veracruz, Ramirez). 



2. Smilax purpusii T. S. Brandeg. Univ. Calif. Publ. Hot. 6 : 117. 1915. 

 Known only from the type locality, Cerro del Boquer6n, Chiapas. 



Leaves coriaceous, 5 to 10 cm. long, reticulate-veined, usually 7-nerved ; 

 umbels often racemose. 



3. Smilax tomentosa H. B. K. Nov. Gen. & Sp. 1: 272. 1815. 



Oaxaca. Central America and northern South America ; type from Santa F6, 

 Colombia. 



Leaves broadly ovate-cordate to lanceolate, sometimes as much as 25 ciu. long 

 and 20 cm. wide, acute or acuminate; umbels densely many-flowered. 



4. Smilax subpubescens A. DC. In DC. Monogr. Phan, 1: 69. 1878, 

 Taniaulipas and Veracruz; type from Orizaba, Veracruz. 



