26 ENUMERATION OF PHILIPPINE PLANTS 1^22 



HALOPHILA OVALIS (R. Br.) Hook. f. Fl. Tasm. 2 (1860) 45; Naves 

 Novis. App. (1882) 298; Merr. in Philip. Journ. Sci. 10 (1915) 

 Bot. 2. 

 Caulinia ovalis R. Br. Prodr. (1810) 339. 

 Palawan, Bancoran, Biliran, Merrill 7155, Phil. PI 1223, B. S. 18755 

 McGregor. In sand on coral reefs. On sandy bottoms of shallow seas. 

 India to Australia and Polynesia. 



HALOPHILA OVATA Gaudich. Bot. Freycinet's Voy. (1826) 430, t. 40, f. 1; 

 Ostenfeld in Philip. Journ., Sci. 4 (1909) Bot. 68; Merr. Fl. Manila 

 (1912) 70. 

 Luzon (Manila Bay), Merrill U12, Phil. PL 1098, B. S. 9899 Robinson. 

 In shallow water on rather muddy bottom. Marianne Islands. 



HALOPHILA SPINULOSA (R. Br.) Aschers. in Neumayer Anleit. Wis- 

 sensch. Beob. (1875) 368, ed. 2 (1888) 396; Benth. FL AustraL 7 

 (1878) 183; Merr. in Philip. Journ. Sci. 10 (1915) Bot. 2. 

 Caulinia spinulosa R. Br. Prodr. (1810) 339. 

 Luzon (Camarines), Mindanao, F. B. 12275 Curran. In shallow seas 

 on reefs. In shallow seas, eastern and northern coasts of Australia; Java, 

 and probably in other parts of Malaya. 



2. HYDRILLA L. C. Richard 



HYDRILLA VERTICILLATA (Roxb.) Royle IH. Bot. HimaL (1839) t. 376; 

 Presl Bemerk. (1842) 112; Casp. in Pringsh. Bot. Jahrb. 1 (1858) 

 494; Naves Novis. App. (1880) 214; Merr. & Rolfe in Philip. 

 Journ. Sci. 3 (1908) Bot. 96; Merr. Fl. Manila (1912) 69, Sp. Blan- 

 coanae (1918) 58. 

 Serpicmla verticillata Linn. f. Suppl. (1781) 416; Roxb. PI. Ck)ro- 



mandel 2 (1798) t. 16J,. 

 Udora verticillata Spreng. Syst. 1 (1825) 170; Llanos Frag. PI. Filip. 

 (1851) 101; F.-Vill. & Naves in Blanco Fl. Filip. ed. 3, 4' (1880) 

 78. 

 Northern Luzon to Mindanao, in most or all islands and provinces. In 

 shallow fresh water at low and medium altitudes; often abundant. Cen- 

 tral Europe to Asia southward to Australia. 



Local names: Ginga (Ibn.) ; inata (Tag.); lomotlomotan (Tag.); liisai 

 (Mag.). 



3. VALLISNERIA Linnaeus 



VALLISNERIA GIGANTEA Graebn. in Engl. Bot. Jahrb. 49 (1912) 68; 



Merr. Fl. Manila (1912) 69; Hallier f. Nov. Guinea 8 (1913) 915. 



Vallisneria spiralis Blanco Fl. Filip. (1837) 781, ed. 2 (1845) 538, ed. 



3, 3 (1879) 187; Naves Novis. App. (1880) 214; Vidal Phan. Cuming. 



Philip. (1885) 148, non Linn. 



Luzon (Pangasinan, Bulacan, Nueva Ecija, Laguna, Rizal, Camarines). 



In lakes and slow streams at low altitudes. Enormously variable in size, 



apparently depending largely on the depth of the water in which it grows. 



New Guinea, New South Wales. 



Local names: Balaiba (Ilk.); lanteng (Ibn.); mariu-bariu (Bik.) ; pala- 

 ipa (Ilk.) sabotan-buaia (Tag.) ; sintas-sintasan (Tag., from Sp. cinta 

 = ribbon) . 



