732 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



5. Cissus tuberosa DC. Prodr. 1: 629. 1824. 

 Guerrero, Oaxaca, and Puebla. 



Stems pubescent or glabrate; leaves 4 to 9 cm, long, the divisions narrow or 

 broad, coarsely dentate or deeply lobate, sparsely pubescent or glabrate; pedi- 

 cels glabrous ; fruit subglobose, 5 to 6 mm. in diameter. " Coral de Colima," 

 " bejuco de coral " (Oaxaca). 



6. Cissus trifoliata L. Syst. Nat. ed. 10. 2: 897. 1759. 

 Sicyos trifoliata L. Sp. PI. 1013. 1753. 



Cissus aeida L. Sp. PI. ed. 2. 170. 1762. 



Baja California to Colima, Coahuila, YucatSn, and Oaxaca. Widely dis- 

 tributed in tropical America. 



Plants glabrous or sparsely pubescent ; leaves mostly trifoliolate, the leaflets 

 2 to 9 cm. long, usually broadly cuneate, coarsely dentate or lobate ; cymes 

 equaling or longer than the leaves ; fruit purple or nearly black, 5 to 8 mm. 

 long. " Bolontobi " (Yucatan); " hierba del buey " (Chihuahua, Sonora, 

 Ramirez); " uvilla " (Nicaragua). 



This has been reported from Yucatan as Vitis arborea L. Some of the Mex- 

 ican specimens have been referred to C. incisa (Nutt.) Des Moul., a form 

 wliich is doubtfully distinct from C. trifoliata. In Yucatan the mucilaginous 

 leaves are applied as poultices for sores and cutaneous diseases. The leaves 

 have an acid flavor and Barham states that in Jamaica they were eaten as a 

 sauce with other food. Havard states that the large tubers borne upon the 

 roots are very poisonous, causing violent vomiting and purging, and he reports 

 that the leaves sometimes produce an eruption upon the skin, like that caused 

 by poison ivy {Rhus radicans). 



7. Cissus microcarpa Vahl, Eclog. Amer. 1 : 16. 1796. 



Veracruz and Chiapas. West Indies and northern South America. 



Glabrous throughout or nearly so; leaves trifoliolate, the leaflets obliquely 

 ovate, elliptic, or rhombic, obtuse to acuminate, irregularly appressed-serrate ; 

 fruit 6 to 7 mm. in diameter. 



8. Cissus cucurbitina Standi., sp. nov. 



Type from Cueruavaca, Morelos (Rose d Rose 11047; U. S. Nat. Herb. no. 

 453834). 



Petioles 6.5 to 9.5 cm. long; leaves simijle or trifoliolate; simple leaves 

 rounded-cordate, 14 to 16 cm. long, shallowly 3-lobate, deeply cordate at base, 

 rounded at apex, remotely appressed-serrate, glabrous or nearly so; leaflets 

 of trifoliolate leaves rhombic, appressed-serrate; cymes short-pedunculate, 

 densely many-flowered, about 7 cm. broad, covered with sparse appressed 

 whitish hairs ; calyx 2 to 2.5 mm. long ; corolla 3 mm. long. 



The material available is incomplete, but the very large flowers Indicate that 

 the plant is specifically distinct. 



9. Cissus salutaris H. B. K. Nov. Gen. & Sp. 5: 225. 1821. 



Oaxaca and Veracruz. Colombia and Venezuela ; type from Venezuela. 



Stems sparsely hispidulous ; leaflets 3, obovate or elliptic-obovate, 4.5 to 

 9 cm. long, coarsely crenate-serrate, with conspicuous reticidate venation, 

 hairy on both surfaces or finally glabrate; flowers umbellate-cymose, the pedi- 

 cels hairy. 



10. Cissus rhombifolia Vahl, Eclog. Amer. 1: 11. 1796. 



Sinaloa to San Luis Potosf, Veracruz, and Oaxaca. West Indies, Central 

 America, and South America. 



Leaflets 3, ovate, rhombic, or broadly elliptic, 4 to 10 cm. long, all petiolu- 

 late, sharply serrate, hirtellous on one or both surfaces; flowers in cymose 



