STANDLEY TEEES AND SHRUBS OF MEXICO. 1181 



6. Marsdenia macrophylla (Htmb. & Bonpl. ) Fourn. in Mart. Fl. Bras. 6*: 

 321. 1885. 



Asclepias macrophylla Humb. & Bonpl.; Roem. & Schult. Syst. Veg. 6: 86. 

 1820. 



Marsdenia maculata Hook, in Curtis's Bot. Mag. pi. 4299. 1847. 



Jalisco to Tamaulipas, San Luis Potosi, and Yucatan. Lesser Antilles, Cen- 

 tral America, and northern South America ; type from Venezuela. 



Woody vine, nearly glabrous ; leaves ovate to elliptic or oval, 7 to 14 cm. 

 long, acute or acuminate, often subcordate at base, pale beneath ; cymes many- 

 flowered, short-pedunculate, calyx lobes obtuse ; corolla yellowish, 5 to 6 mm. 

 long. " Talayote " (Tamaulipas). 



6. Marsdenia trivirgulata Bartlett, Proc. Anier. Acad. 44: 652. 1909. 

 Type from Iguala Canyon, Guerrero, altitude 900 meters. 



Stems slender, sufCruticose, bifariously puberulent ; leaves slender-petiolate, 

 elliptic, 2.5 to 5 cm. long, acuminate, puberulent ; cymes subsessile, few- 

 flowered ; calyx lobes obtuse ; corolla 6 mm. long. 



7. Marsdenia peraflinis Blake, Contr. Gray Herb. 53: 48. 1918. 

 Guerrero and perhaps Michoac^n ; type from Baqueta, altitude 150 meters. 

 Stems woody, when young sparsely hispidulous ; leaves ovate or elliptic, 



3 to 6.5 cm. long, acute or acuminate, puberulent ; cymes 8 to 15-flowered, 

 sessile or nearly so ; calyx lobes obtuse ; corolla about 5 mm. long, glabrous 

 outside. 



8. Marsdenia propinqua Hemsl. Biol. Centr. Amer. Bot. 2: 337. 1882. 

 Tamaulipas and Veracruz ; type from the region of Orizaba. 



Woody vine; leaves slender-petiolate, ovate to rounded-elliptic, 8 to 17 cm. 

 long, acuminate or abruptly short-pointed, tomentose beneath ; cymes very 

 dense, many-flowered, short-pedunculate ; calyx lobes obtuse ; corolla 7 to 8 

 mm. long, red, pubescent outside ; follicles 11 to 15 cm. long, smooth. 



9. Marsdenia bourgeana (Baill.) Rothe, Bot. Jahrb. Engler 52: 408. 1915. 

 Pseudomarsdenia hourgeana Baill. Hist. PI. 10: 268. 1890. 



Veracruz and Oaxaca ; type from Hacienda de Cuspango. 

 Woody vine; leaves broadly ovate, 5 to 7 cm. long, acuminate, rounded or 

 ■» truncate at base, densely pubescent ; cymes branched, many-flowered ; calyx 

 lobes obtuse or acute; corolla barbate within; fruit ovoid, woody. 



10. Marsdenia coulteri Hemsl. Biol. Centr. Amer. Bot. 2: 336. 1882. 

 Marsdenia sclerorum Loesener, Bull. Herb. Boiss. 2: 557. 1894. 

 Coahuila to Veracruz, Yucatan, Puebla, and Oaxaca ; type from ZimapSn, 



Hidalgo. 



Coarse woody vine ; leaves slender-petiolate, ovate-oblong to broadly ovate 

 or rounded-deltoid, 3 to 7.5 cm. long, obtuse to acuminate, densely pubescent ; 

 cymes dense, many-flowered short-pedunculate ; calyx lobes obtuse ; corolla 

 whitish, about 3 mm. long; fruit 6 to 13 cm. long, smooth, glabrous. 

 " Talayote " (Tamaulipas ) . 



11. Marsdenia gilg-iana Rothe, Bot. Jahrb. Engler 52: 410. 1915. 

 EcUptostelma molle T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 371. 1917. 

 Veracruz ; type from Zacuapan. Guatemala. 



Scandent shrub, the young stems densely pilose ; leaves ovate to rounded- 

 ovate, 9 to 15 cm. long, obtuse to short-acumuiate, densely pilosulous, or 



