THE FLORA OF MOUNT PULOG. 
331 
ciliatae, caetero glabrae, 2 superiores vacuae ; palea gluma brevior, bicar- 
inata, bidenticulata. Stamina 3, aiitheris brevibus. ' Styli distincti, 
stigmatibus plumosis. Caryopsis oblonga, nitida, brunnea, liilo puncti- 
f orme. Gramina perennia, dense caespitosa, hnmilia, foliis • involuto- 
setaceis. Panienla ad spiculam erectam, solitariam redncta. 
Monostachya centrolepidoides Merrill sp. noy. 
Dense caespitosa, glabra, 6 ad 10 cm alta ; foliis involnto-setaceis, 
erectis, snbrigidis, 2 ad 4 -cm longis, 0.5 mm diametro ; spicnlis solitariis, 
parvis, lanceolatis, erectis, acnminatis, circiter 6 mm longis, pedunculo 
qnam folia breviori. 
A densely tnfted perennial grass 6 to 10 cm high, glabrous except the 
lower margins of the flowering glumes, the culms fascieulate'ly branched 
from the lower portions, the internodes very short. Sheaths rather loose, 
thin, exceeding the internodes; ligule a ring of weak, 1 mm long hairs; 
leaf-blades involute-setaceous, somewhat rigid, 2 to 4 cm long, 0.5 mm 
in diameter. Panicle reduced to a single erect spikelet, the peduncle 
erect, rigid, minutely scabrid, exserted 1 to 2 cm beyond the upper sheath; 
sometimes one or two 0.8 to 1 mm long pedicels of aborted spikelets are 
to be found near the apex of the culm below the solitary terminal spikelet. 
Spikelet green or straw-colored, lanceolate or narrowly lanceolate, acum- 
inate, about 6 mm long, 1 to 1.3 mm in diameter; empty glumes 2, the 
first oblong-ovate, 3 mm long, 2 mm wide, acute, not keeled, glabrous, 
subhyaline; obscurely 5-nerved, the nerves somewhat convergent, not 
strictly parallel, the second similar to the fir'st but 3.5 mm long and 
3-nerved; flowering glumes 4, of which the lower two contain perfect 
flowers, the upper two being smaller and containing only a palea, the 
first flowering glume ovate-lanceolate, not keeled, 3.5 to- 4 mm long, about 
1.3 mm wide, . obscurely 7- to 9-nerved, acuminate, the apex minutely 
2-toothed, and with a straight,. 1 mm long, scabrid, terminal mucro, the 
margins in the lower third somewhat ciliate-pilose with 0.5 to 0.8 mm 
long hairs. Palea linear-lanceolate, hyaline, 3 mm long, 0.8 mm wide, 
minutely 2-toothed, 2-keeled, ' the keels ' slightly scabrid. The second 
flowering glume and its palea similar to the first and like it containing 
a perfect flower. Third flowering glume similar to the first and second 
but smaller, about 2 mm long, containing a palea but no' flower. Fourth 
flowering glume terminating the rachilla, very small, 1 to 1.5 mm long, 
flowerless, but containing a small palea. Callus to each flowering glume 
minutely ciliate. Joints of the rachilla glabrous, 0.8 to 1 mm long, 
articulated below each flowering glume. Caryopsis free from the palea, 
narrowly oblong, brown, shining, 1.5 mm long, 0.5 mm in diameter, the 
hilum punetiform. 
Mount Pulog, Province of Benguet, Luzon, For. Bur. 160S8 Curran, Merritt & 
ZschohT^e, January 5, 1909, growing in trails and open spots in the grass lands of 
the summit, altitude about 2,800 m. 
