382 
(61) ERAGROSTIS Host. 
Panicles various, usually open. Spikelets usually densely many-flow- 
ered. Flowering glumes imbricate, strongly 3-nerved, keeled, acute. 
Species about 125 in all wann countries; about 10 in tlie Philippines. 
1. Rhachllla ol spikelets more or less jointed and breaking up from 
above downward. (Sect. Cataclastos. ) 
2. Flowering glumes strongly acuminate (1)E. lasiocJada 
2. Flowering glumes acute or obtuse. 
3. Panicles 10 cm. long or less. 
4. Panicles open, rather lax (2) E. tenella 
4. Panicles dense, spike-like, densely flowered ; 
culm viscid below the panicle (3) E. viscosa 
3. Panicles 20 to 40 cm. in length, 
4. Panicle branches whorled, scarcely branched 
from the base ; spikelets 6 to 10 flowered.... (4) E. interrupta 
4. Panicle branches whorled and branched from 
the base, the branchlets capillary ; spikelets 
5-flowered or less (5) E. japonica 
1. Rhachilla of spikelet tough, persistent; flowering glumes falling 
away from its base upward. (Sect. Ptekobssa.) 
2. Spikelets flat, elliptical-ovate, the lateral nerves of the 
flowering glumes very prominent (6) B. unioloides 
2. Spikelets linear to linear-oblong, compressed ; nerves of the 
flowering glume prominent or not. 
3. Panicle branches elongated, spreading or ascending. 
4. Annual ; spikelets pale (7) B. disians 
4. Perennial ; spikelets plumbeous. 
5. Panicles about 20 cm. long ; branches 
ascending (8) B. elegantula 
5. Panicles 10 cm. long or less ; branches 
usually divaricately spreading (9) B. elongata 
3. Panicle branches short, appressed, densely flowered 
throughout, giving the panicle a spiciform appear- 
ance (10) E. spartinoides 
(1) Eragrostis lasioclada Merrill, sp. Jiov. ^Cataclastos. 
Pereimis; culmis erectis, ad 70 cm. altis, 3-nodis, simplicibus; vaginis 
cjuam internodiis brevioribus, margiiiibus sparse longe-pilosis ; laminis 
aiiguste liiiearibus, acuminatis, 15-20 cm. longis, 2-3 mm. latis; paiii- 
culis olilongis, ad 15 cm. longis, rliacbi ramis ramulis pedicellibusque 
sparse longe-pilosis, ramis inferioribus ad 4 cm. longis, erectis vel ascen- 
dentilius; spiculis olilongis, 6-7 mm. longis, 1 mm. latis, ad 5-floris ; 
glumis sterilibus inaequalibus, 1-nervis, acutis vel acuminatis; glumis 
fertilibus 2. 5-3. 5 mm. longis, sul)ulato-acuminatis. 
A tufted erect perennial grass, the culms about 70 cm. tall, slender, 
simple, glalirous or slightly pilose; nodes 3, glabrous. Sheaths shorter 
than the internodes, comjiressed, the margins slightly long-pilose; ligule 
short, truncate; blades jiarrowly linear, plane or involute, acuminate, 
rigid, 15 to 20 cm. long, 2 to 3 mm. wide, slightly long-])ilose, Itecoming 
glaltrous. Panicles oblong, sti'ict, narrow, about 15 cm. long, 1 to 2 cm. 
in dianieter, the lower liranches 4 cm. long, ascending or erect, the 
hranches, hranchlets, and jiedicels with scattered long white hairs. Spike- 
lets oblong, pale or purplish, about 5-flowercd, 6 to 7 mm. long, 1 mm. 
