190 ANNALS NEW YORK ACADEMY OF SCIENCES 



14. Ipomcea murucoides Roem. & Schult. Syst. 4 : 248. 1819. 



Convolvulus macranthus H. B. K. Nov. Gen. & Sp. 3: 95. 1818. 



Ipomcea macrantha G. Don, Gen. Syst. 4: 267. 1838. Not /. macrantha Roem. 



& Schult. 1819. 

 Convolvulus strictus WiUd.; Steud. Nom. ed. 2, 1: 412. 1841. 



A large tree, the inflorescence and young parts densely tomentose or woolly; 

 leaf-blades oblong-lanceolate, 7-12 cm. long, rounded or obtuse at the base, long- 

 acuminate, tomentose beneath; calyx woolly without and pubescent within; the 

 unequal sepals 18-28 mm. long; corolla 7-8 cm. long, woolly-pubescent without; 

 capsules 25 mm , long; seeds with a long coma of white hairs on the dorsal angles and 

 apex. 



Type locality: Near Guanajuato and Santa Rosa, Queretaro, Mexico. 

 Distribution: Hillsides, southern Mexico and Central America. 

 Specimens examined from Oaxaca, Morelos, Michoacan, Pueblo, Quere- 

 taro, Valley of Mexico, Guanajuato and Guatemala. 



15. Ipomcea arborescens (Humb. & Bonpl.) G. Don, Gen. Syst. 4: 



267. 1838. 



Convolvulus arborescens Humb. & Bonpl.; Willd. Enum. 1: 204. 1809. — H. B. K. 



Nov. Gen. & Sp. 3: 94. 1818. 

 C. arboreus Balb.; Steud. Nom. ed. 2. 1: 407. 1841. 

 Argyreia oblonga Benth. Bot. Sulph. 133. 1844. 



Ipomoea murucoides var. glabrata Rose, Contr. Nat. Herb. 1: 107. 1891. 

 Convolvulus Quanhtzahuath Sesse & Moc, Fl. Nov. Hisp. in La Naturaleza II. 1: 23. 



1887. Fl. Mex. 1. c. II. 2: append. 36, 37. 1893. 



Leaf-blades finely velvety-pubescent above, paler, densely pubescent and prom- 

 inently reticulate-veined beneath, ovate, cordate; sepals oval obtuse, 6-10 mm. 

 long, tomentulose-pubescent within and without; corolla white, about 5 cm. long; 

 capsules 2 cm. high; seeds black with a long reflexed white coma of hairs on the 

 dorsal angles. 



Type locality: America meridionali. 



Distribution : Dry hilly regions of western and southern Mexico. 



Illustrations: Gard. & For. 7: p. 364. 1894. 



Specimens examined from Sonora, Sinaloa and Morelos. 



16. Ipomoea cuemavacensis House, Bot. Gaz. 43 : 410. 1907. 



Convolvulus arboreus Moc. & Sesse, Fl. Nov. Hisp. in La Naturaleza II. 1: 23. 1887. 

 — Fl. Mex, 1. c. 2: append. 38. 1893. Not C. arboreus Balb. 1841. 



Closely related to the preceding, but the leaf-blades oblong, rounded at the base, 

 long-acuminate, 10-15 cm. long and 5-6.5 cm. wide. 



