LEMNACEAE—FLAGELLARIACEAE 93 
Illustrative specimen from Benguet Subprovince, Luzon, May, 
1914 (Merrill: Species Blancoanae No. 460). 
PISTIA Linnaeus 
PISTIA STRATIOTES Linn.; Blanco Fl. Filip. (1837) 651; ed. 2 (1845) 
454; ed. 3, 3 (1879) 55, t. 468. 
The Linnean species was correctly interpreted by Blanco. It 
is common and widely distributed in the Philippines in stagnant 
pools, slow streams, etc., at low altitudes, its common Tagalog 
name being quiapo, its Ilocano name loloan. It is exceedingly 
variable in size, the rosettes in luxuriant specimens up to 20 cm 
in diameter. 
Illustrative specimen from Umingan, Pangasinan Province, 
Luzon, May, 1914 (Merrill: Species Blancoanae No. 94). 
LEMNACEAE 
LEMNA Linnaeus 
Lemna gibba Blanco FI. Filip. (1887) 672; ed. 2 (1845) 468; ed. 3, 3 (1879) 
- 98, non Linn. =LEMNA PAUCICOSTATA Hegelm. 
This species is frequently very abundant on stagnant pools 
about Manila during the rainy season, often associated with 
Wolfia arrhiza Wimm., less frequently associated with Spiro- 
dela polyrrhiza (Linn.) Schleid. The Tagalog names are inala, 
lia, and lija. It is widely distributed in the Philippines. This 
is probably the form indicated by Llanos as Conferva lia Llanos 
Frag, Pl. Filip. (1851) 113 (sp. nov.); F.-Vill. & Naves in 
Blanco FI. Filip. ed. 3, 41 (1880) 92, regarding which he naively 
states that he never had any occasion to write a description 
of it, but that there was scarcely any doubt as to its belonging 
in Conferva. There is no description. 
Illustrative specimen from Manila, Luzon, July, 1914 (Merrill: 
Species Blancoanae No. 131). 
FLAGELLARIACEAE 
FLAGELLARIA Linnaeus 
FLAGELLARIA INDICA Linn.; Blanco Fl. Filip. ed. 2 (1845) 196; ed. 3, 
1 (1877) 347. ; 
Blanco correctly interpreted the Linnean species, which is com- 
mon throughout the Archipelago at low and medium altitudes. 
It is commonly known as balinguay. 
Illustrative specimen from Taytay, Palawan, May, 1913 (Mer- 
rill: Species Blancoanae No. 386). 
