228 MERRILL. 
One family, Stylidiaceae, with the genus Stylidium, although 
known as Philippine for several years, is here definitely added 
to the Philippine list. In nomenclatural studies it has been found 
necessary to publish twenty-three new combinations or new 
names, in strict accordance with the provisions of the Vienna 
Code. 
POTAMOGETONACEAE. 
RUPPIA L. 
RUPPIA MARITIMA L. Sp. PL (1753) 127, subsp. ROSTELLATA Koch 
in Reichb. Ic. PI. Crit. (1824) 66, L 174; Graebner in Engl. 
Pflanzenreich 31 (1907) 144. 
Luzon, Province of Rizal, Malabon, Phil. PL 799 Merrill, January, 1911, 
in brackish water of fish ponds. 
Widely distributed in temperate and tropical regions of both hemis- 
pheres. Ruppia maritima L. has previously been reported from the Phil- 
ippines by Naves,' but his record has not previously been verified. 
HYDROCHARITACEAE. 
HALOPHILA Thou. 
HALOPHILA BECCARII Aschers. in Nuovo Giorn. Bot. Ital. 3 (1871) 302. 
Luzon, Province of Rizal, Paranaque, Merrill 80^5 (det. C. H. Osten- 
feld), July, 1911. Abundant in some of the fish ponds, in salt water, in 
certain ones quite covering the muddy bottom in water 1 m deep or less. 
A species previously known only from Ceylon and from Sarawak, Borneo, 
the fourth one of the genus to be found in the Philippines. 
GR AMINE AE. 
ANDROPOGON L. 
ANDROPOGON ZIZANIOIDES (L.) Urb. Symb. Ant. 4 (1903) 79. 
Phalaris zizanioides L. Mant. 2 (1771) 183. 
Andropogon squarrosus L. f. Suppl. (1781) 433; Hack, in DC 
Monog. Phan. 6 (1889) 542. 
Vetiveria zizanioides Nash in Small Fl. S. E. U. S. (1903) 67. 
If Andropogon is to be considered in the broad sense, following HackeUs 
conception of the genus, then the oldest specific name for this well known 
species, which according to the Vienna Code must be taken up, is that 
indicated above. More recently the same transfer has also been made by 
Hochreutiner." The species is widely distributed in the Philippines, but 
has probably been introduced within historical times. 
'Novis. App. (1880) 297. 
• BuU. N. Y. Bot. Card. 6 (1910) 262. 
