132 
The Philippine Journal of Science 
1914 
IPOMOEA HEDERACEA (L.) Jacq. Collect 1 (1786) 124. 
Pharbites hederacea Choisy Mem. Soc. Phys. Genev. 6 (1833) 440; 
Safford 349. 
Convolvulus hederaceus Linn. Sp. PI. (1753) 154. 
Admitted on the authority of Safford, who cites fofgu as its local name; 
frequently confused with the very closely allied Ipomoea nil Roth. 
A native of tropical America, now widely distributed in both hemi- 
spheres. 
IPOMOEA PES-CAPRAE (Linn.) Roth Nov. PI. Sp. (1821) 109; Safford 
299. 
Convolvulus pes-caprae Linn. Sp. PI. (1753) 159. 
McGregor 545, G. E. S. 71. 
Along the seashore in the tropics of both hemispheres. 
IPOMOEA REPTANS (Linn.) Poir. in Lam. Encycl. Suppl. 3 (1813) 460. 
Convolvulus reptans Linn. Sp. PI. (1753) 158, p. p. 
G. E. S. 48, in wet places, local name cancon, which is also its Tagalog 
name in the Philippines. 
Widely distributed in the tropics of both hemispheres. 
IPOMOEA TRILOBA Linn. Sp. PI. (1753) 161. 
Ipomoea mariannensis Choisy in Mem. Soc. Phys. Genev. 6 (1833) 468; 
Safford 299. 
McGregor 450. 
A native of tropical America, introduced into Guam and the Philippines 
at an early date from Mexico, now also found in Singapore, Java, and 
Mauritius. 
There is not the slightest doubt but that Ipomoea mariannensis Choisy, 
the type of which was from Guam, is quite identical with the Linnean 
species, and it is accordingly here reduced. 
MERREMIA Dennstaedt 
MERREMIA GEM ELLA (Burm.) Hallier f. ex Koord in Meded. Lands 
Plantent. 19 (1898) 544; Merr. in Philip. Journ. Sci. 1 (1906) Suppl. 
1 120 . 
Convolvulus gemellus Burm. FI. Ind. (1768) 46. 
G. E. S. 18, locally known as nyetcor. 
India to Malaya. 
MERREMIA HEDERACEA (Linn.) Hallier f. in Engl. Bot. Jahrb. 13 
(1894) 154. 
Convolvulus hederaceus Linn. Sp. PI. (1753) 154. 
Thompson 20, November, 1910. 
India to Malaya. 
OPERCULINA Manso 
OPERCULINA TUBEROSA (Linn.) Meissn. in Mart. FI. Bras. 7: 212. 
Ipomoea tuberosa Linn. Sp. PI. (1753) 160. 
McGregor 551, near Agaiia. 
Apparently a recent introduction, as it is in the Philippines; a native 
of tropical America. 
