122 
MERRILL AND ROLFE. 
Museum and the duplicate type at Kew were examined, and Mr. Brown informed 
us that Loher’s and Ridley’s plants were undoubtedly referable to Robert Brown’s 
species, which was however, in his opinion, not a Cynanchum. We have ac- 
cordingly here accepted the genus Isohnostemma, adopting the earliest specific 
name available. 
Australia, Luzon, and the Malay Peninsula. 
IPOMOEA Linn. 
Ipomoea quinata R. Br. Prodr. (1810) 486; Choisy in DC. Prodr. 9 (1845) 
385; Clarke in Hook. f. FI. Brit. Ind. 4 (1883) 214; Forbes & Hemsl. in Journ. 
Linn. Soc. Bot. 26 (1890) 162. 
Luzon, Province of Benguet, Loher 2143, 2144- 
Eastern India to southern China and north Australia; not previously reported 
from the Philippines. 
Ipomoea hispida (Vahl) R. & S. Syst. 4 (1819) 238. 
Convolvulus hispidus Vahl Symb. 3 (1794) 29. 
Ipomoea criocarpa R. Br. Prodr. (1810) 484; Choisy in DC. Prodr. 9 (1845) 
369; Benth. FI. Austral. 4 (1869) 426; Clarke in Hook. f. FI. Brit. Ind. 4 (1883) 
204. 
Luzon, Province of Benguet, Bued River, Merrill 4210, November, 1905, a 
narrow-leaved form. 
Widely distributed in the tropics of the Old World from Asia to Australia ; 
not previously reported from the Philippines. 
Ipomoea involucrata Beauv. FI. Owar. 2 (1807) 52, t. 89. 
Ipomoea pileata Roxb. FI. Ind. 1 (1832) 504; Choisy in DC. Prodr. 9 (1845) 
365; Clarke in Hook. f. FI. Brit. Ind. 4 (1883) 203; Forbes & Hemsl. in Journ. 
Linn. Soc. Bot. 26 (1890) 162. 
C'ulion, Merrill 542, December, 1902. 
Tropical Africa and Asia; new to the Philippines. 
M ERR EM I A Dennst. 
Merremia vitifolia (Burin.) Hallier f. in Engl. Bot. Jahrb. 1 6 (1893) 552; 
Prain in Journ. As. Soc. Bengal 74 = (1905) 303. 
Convolvulus vitifolius Bunn. FI. Ind. 1 (1768) 45, t. 18, f. 1. 
Ipomoea vitifolia Sweet Hort. Brit. ed. 2 (1830) 372; Choisy in DC. Prodr. 
9 (1845) 361; Clarke in Hook. f. FI. Brit. Ind. 4 (1883) 213. 
Palawan (Paragua), Ewiig River, Merrill 133, February, 1902; Bur. Sci. 802 
Foxworthy, April, 1906. Balabac, Bur. Sci. 483 Mangubat, March, 1906. 
British India to the Malay Archipelago; new to the Philippines. 
Merremia bufalina (Lour.) comb. nov. 
Convolvulus bufalinus Lour. FI. Cochinchin. 1 (1790) 109. 
Ipomoea bufalina Choisy in Mem. Soc. Phys. Genev. 6 (1833) 452; DC. Prodr. 
9: 360. 
Ipomoea Riedeliana Oliv. in Hook. leones 15 (1883) 19, pi. 1424- 
Merremia Riedeliana Hallier f. in Engl. Bot. Jahrb. 18 (1904) 552. 
Luzon, Province of Rizal, Montalban, Merrill 5040, March, 1906; Novaliches, 
Loher 4156, February, 1891: Province of Union, Bauang, Elmer 5622, February, 
1904. 
Cochin China and the Malay Archipelago; new to the Philippines. 
