122 MERRILL, AND ROLFE. 
M 4 
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, wliicli was however, in his- opinion, not a Cyiuiiwhum. We have ac- 
cordingly here accepted the genus Ischnostemma, adopting the earliest specific 
name available. 
AiL-strulia, Luzon, and the Malay Peninsula. 
IPOMOEA Linn. 
Ipomoea quinata U. Br. Prodr. (1810) 486^ Choisy in DC. Prodr. 9 (1845) 
385; Clarke in Hook. f. Fl. Brit. Ind. 4 (1883) 214; Forbes & Hemsl. in Journ. 
Linn. Soc. Bot. 26 (1890) 1G2. 
Luzon, Province of Benguet, Loher 21^3, 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 criociirpa R. Br. Prodr. (1810) 484; Choisy in DC. Prodr. 9 (1845^ 
369; Benth. Fl. Austral. 4 (1869) 426; Clarke in Hook. f. Fl. Brit. Ind. 4 (1883) 
204. 
Luzon, Province of Benguet, Bued River, Merrill -^270, 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. Fl. Owar. 2 (1807) 52, t. 89, 
Ipomoea pileata Roxh. Fl. Ind. 1 (1832) 504; Choisy in DC. Prodr. 9 (1845) 
365; Clarke in Hook. f. Fl. Brit. Tnd. 4 (1S83) 203; Forbes & Hemsl. in Journ. 
Linn. Soc. Bot. 26 (1890) 162. 
CULION, Merrill 5/^2, December, 1902. 
Tropical Africa and Asia; new to the Philippines. 
M ERR EM I A Dennst. 
Merremia vitifolia (Burm.) Hallier f. in Engl. Bot. Jahrb. 16 (1893) 552; 
Plain in Journ. As. Soc. Bengal 74- (1905) 303. 
Convolvulus vitifolius Burm. Fl. Ind. 1 (1768) 45, t. 18, f. 1. 
Ipomoea vitifolia Sweet Hort. Brit. ed. 2 (1830) 372; Choisy in DC. Prodr. 
9 (1845) 3G1; Clarke in Hook. f. Fl. Brit. Ind. 4 (1883) 213. 
Palawan (Paragna), Ewiig River, Merrill 133, February, 1902; Bur. Sci. 802 
Foxworihy, April, 1906. Balauac, Bur. Sci. 483 Mangulat, March, 190G. 
British India to the Malay Archipelago; new to the Philippines. 
Merremia bufalina (Lour.) comb. nov. 
Convolvulus hufalinus Lour. Fl. Cochincliin. 1 (1790) 100. 
Ipomoea bufalina Choisy in Mem. Soc. Phys. Gen&v. 6 (1833) 452; DC. Prodr. 
9: 360. 
Ipomoea Riedeliana Oliv. in Hook. Icqnes 15 (1883) 19, pi 1^24. 
Merremia liiedeliana Hallier f. in Engl. Bot. Jahrb. 18 (1904) 552. 
Luzon, Province of Rizal, Montalban, Merrill 50^0, March, 1906; Novaliches, 
Lohcr 4^50, February, 1891: Province of Union, Batiaiig, Elmer 6622, February, 
1904. 
Cochin China and the Malay Archipelngo; new to the Philippines. 
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