VoL x HYDROCHARITACEAE 27 



4. BLYXA Thouars 



BLYXA OCTANDRA (Roxb.) Planch, ex Thwaites Enum. PI. Ceyl. 

 (1859-64) 332; Merr. in Philip. Journ. Sci. 7 (1912) Bot. '73. 

 Vallisneria octandra Roxb. PI. Coromand. 2 (1798) 34, t. 165. 

 Blyxa roxburghii Rich, in Mem. Inst. France (1811) 77, t. 5; Naves 

 Novis. App. (1880) 214. 



Luzon (Bontoc), Palawan, Merrill Phil. PI. 12J+4, Vanoverbergh 664.. 

 In shallow lakes, rice paddies, etc., from sea level to 1,250 m altitude; 

 apparently very local. Tropical Asia to Malaya, Australia, and the Ca- 

 roline Islands. 



Local name: Pangpangdan (Bon.). 



5. EN H ALUS L. C. Richard 



EN H ALUS ACOROIDES (Linn, f.) L. C. Rich, ex Steud. Nomencl. ed. 2, 



1 (1840) 554; Chatin Anat. PI. Aquat. (1862) 15, t. 6; Merr. 



Interpret. Herb. Amb. (1917) 84, Sp. Blancoanae (1918) 59. 



Stratiotes acoroides Linn. f. Suppl. (1781) 268. 

 Enhalus koenigii L. C. Rich, in Mem. Inst. France 2 (1811) 78; Naves 



Novis. App. (1880) 214. 



Vallisneria sphaerocarpa Blanco Fl. Filip. (1837) 780, ed. 2 (1845) 



538, ed. 3, 3 (1879) 186. 



Northern Luzon to Palawan and Mindanao, Merrill 8070, Sp. Blancoanae 

 383, B. S. 18723 McGregor, 13001, 15558 Fenix. In ^hallow water of 

 sheltered bays along the seashore; of general occurrence where favorable 

 habitats are found. Ceylon through Malaya to tropical Australia. 



Local names: Iaai (Tag.) ; lamon (Tag., Bik.) ; mariu-bariu (Bik.) ; 

 palaipat-baibai (Ilk.); bariau-bariau (Kuy.). 



6. THALASS1A Banks 



THALASSIA HEM PR1CHI I (Ehrenb.) Aschers. in Engl. & Prantl Nat. 

 Pflanzenfam. 2 1 (1889) 254; Merr. Fl. Manila (1912) 71, Philip. 

 Journ. Sci. 10 (1915) Bot. 2. 

 Schizotheca hemprichii Ehrenb. in App. Akad. Berl. 1 (1832) 429. 

 Luzon (Manila Bay), Alabat, Palawan, Cavilli. In tide pools, about 

 coral reefs, etc., probably of general Philippine distribution. In shallow 

 seas, sandy bottom, India to Polynesia. 



7. BOOTTIA Wallich 



BOOTTIA REN i FOLIA Merr. in Philip. Journ. Sci. 4 (1909) Bot. 247. 



Luzon (Camarines), Mindanao (Cotabato), F. B. 12274 Curran, B. S. 

 11593 Robinson. In swamps and slow streams at low altitudes. Endemic. 



Local names: Butid-na-ubal (Mag.); gabi-gabi (Bik.). 



Boottia cordata Wall., reported from the Philippines by Naves, Novis. 

 App. (1880) 213, was unquestionably admitted on the basis of an erroneous 

 identification. 



8. OTTELIA Persoon 



OTTELIA ALISMOIDES (Linn.) Pers. Syn. 1 (1805) 400; Blanco Fi. 

 Filip. (1837) 461, ed. 2 (1845) 321, ed. 3, 2 (1878) 230; Naves 

 Novis. App. (1880) 213; Vidal Phan. Cuming. Philip. (1885) 148; 

 Merr. Fl. Manila (1912) 70, Sp. Blancoanae (1918) 59. 

 Stratiotes alismoides Linn. Sp. PI. (1753) 535. 



