GRAMINEAB 101 



A large genus in all warm and tropical countries, about 13 in the Phil- 

 ippines. 



1. Rachilla of spikelets more or less jointed, breaking up from above 

 downward. (§ Cataclastqs.) 

 2. Panides 10 cm long or less. 



3. Stems not viscid below the panicles 1. E. tenella 



3. Stems viscid below the panicles. 



4. Panicles open, rather lax 2. E. viscosa 



4. Panicles dense, spike-like 3. E. mangalorica 



2. Panicles 20 to 40 cm long 4. E. interrupta 



1. Rachilla of spikelets tough, persistent; flowering glumes falling away 

 from its base upward. (§ Pteeoessa.) 

 2. Panicle-branches elongated, spreading or ascending, the spikelets scat- 

 tered, pedicellate. 

 3. Annual; spikelets green or purplish. 



4. Spikelets ovate to broadly oblong, 5 to. 10 mm lortg 5. E. unioloidea 

 4. Spikelets linear to linear-oblong. 

 6. Panicle-branches solitary, often spreading; spikelets 1 to 1.5 



cm long 6. E. distana 



6. Panicle-branches ascending, the lower ones fascicled; spikelets 



about 5 mm long 7. E. pilosa 



S. Perennial; spikelets plumbeous 8. E. elegantula 



2. Panicle-branches short, appressed, distant, the spikelets densely ar- 

 ranged, sessile 9. E. spartinoidea 



1. E. TENELLA (L.) R. & S. (E. plumosa Link). 



A slender, densely tufted, glabrous annual 20 to 50 cm high. Leaves 

 linear, acuminate, 2 to 10 cm long, 2 to 3 mm wide. Panicles oblong, 

 rather open, 5 to 10 cm long, the branches solitary, spreading or ascending, 

 slender. Spikelets pale, long-pedicelled, about 2 mm long, the flowering 

 glumes 4 to 6, less than 1 mm long (Fl. Filip. pi. 67, E. plumoaa). 



In waste places, common, fl. all the year; throughout the Philippines, 

 certainly introduced. Tropical Asia, Africa, and Malaya. 



2. E. VISCOSA (Retz.) Trin. 



Similar to the preceding but stiffer, stouter, usually taller, reaching 1 

 m in height, the culms viscid below the panicle, the spikelets up to 5 mm 

 long, often purplish, flowering glumes more numerous, up to 15 in each 

 spikelet. 



In similar habitats and with about the same range as the preceding; 

 certainly introduced here. 



3. E. -MANGALORICA Hochst. 



A densely tufted, rather stiff grass 20 to 40 cm high. Leaves 3 to 5 

 cm long, about 3 mm vsride, acuminate. Culms viscid below the panicles. 

 Panicles contracted, very dense, spiciform, 2 to 4 cm long, less than 1 cm 

 in diameter, the branches very short. Spikelets densely arranged, pale 

 or purplish, 3 to 4 mm long, the flowering-glumes 6 to 9, about 1 mm 



long. 



In dry grass lands, fl. July-Sept.; not common in Luzon, certainly in- 

 troduced. India. 



4. E. Interrupta (Lam.) Doell. 



An erect, loosely tufted grass 0.8 to 1.5 m high. Leaves 12 to 20 cm 

 long, 3 to 5 mm wide. Panicles elongated, erect, 20 to 40 cm long, con- 



