GRAMINEAE 89 
. ; 
6. D. pedicililaris (Trin.) Prain. 
A slender, erect, tufted annual 15 to 30 cm high. Leaves linear-lan- 
ceolate, acuminate, ascending, 1.5 to 6 cm long, about 2 mm wide. Spikes 
alternate, ascending or spreading, somewhat scattered, usually 3, some- 
times only 2, 2.5 to 5 cm long, slender, grayish. Spikelets 1.5 mm long, 
in pairs or in groups of threes, in each group one subsessile, the others 
with slender pedicels as long as or longer than the spikelets. 
In open, rather dry grass lands, Masambong, San Juan del Monte, etc., 
not common, fl. Aug.—Nov.; known from but three of four localities in Luzon. 
India. 
22. ISACHNE R. Brown 
Annual or perennial slender grasses. Leaves lanceolate or narrowly 
lanceolate, flat. Spikelets small or minute, in small, usually open panicles, 
subglobose or obovoid, 2-flowered. Glumes 4, the first and second thin, 
subequal, empty, the third and fourth somewhat thickened, paleate, each 
enclosing a usually perfect flower. Grain free within the hardened glume 
and palea. (Greek “equal” and “glumes.’’) 
Species about 35, tropical and subtropical, about 9 in the Philippines, 
one in our area. 
1. |. miliacea Roth. (J. minutula Kunth). 
A very slender, glabrous or somewhat pubescent grass, the stems branched 
below, usually prostrate and rooting at the nodes, the flowering stems 10 
to 20 cm high. Leaves lanceolate, acuminate, 1.5 to 4 cm long, 3 to 5 mm 
wide. Panicles exserted, usually ovate, lax or somewhat contracted, 2 to 
4 em long. Spikelets pale-green, rarely purplish, 1.5 mm long, their 
pedicels slender. 
In open wet lands, especially in rice-paddies, etc., fl. more or less all 
the year; widely distributed in the Philippines. India to China, Malaya, 
and Polynesia. 
23. PANICUM Linnaeus 
Annual or perennial, fine or coarse grasses, of various habits. Leaves 
in our species flat, acute or acuminate, linear to lanceolate. Spikelets 
small, 1- or 2-flowered, terete or dorsally or laterally compressed, awnless, 
or in § Echinochloa awned. Glumes 4, the first and second empty the first 
much smaller than the others, second and third subequal 3- to many- 
nerved, oblong, ovate, or lanceolate; third paleate or not, enclosing a 
staminate flower or empty, the fourth paleate, enclosing a perfect flower, 
hardened in fruit, glabrous, usually shining. Stamens 3. Grain free 
within the fourth glume and the palea. (Ancient Latin name for the 
Italian millet.) 
A very large genus, found in all tropical and temperate countries, about 
35. species in the Philippines. 
1. Spikelets terete or dorsally compressed; inflorescence various. 
2. Spikelets 1- to 4-seriate, close-set on the under side of the rachis of 
the spike, the spikes alternately arranged. 
3. Glumes smooth, awnless. 
4. Spikes shorter than the internode$s............0.000.0...... 1. P. favidum 
4. Spikes longer than the internodes. 
5. Tip of spikes extended beyond the upper spikelets as a setiform 
bristle; spikes very numerous...........................- 2. P. punctatum 
5. Tip of spikes not produced; spikes 2 to 4.21). 3. P. distachyum 
