476 POACE.K. 



ferrcd ; some species have beeu variously referred to Fesfnca, Briza, 

 Duciylis, Ehusine, or Leptochloa ; some liave been i)ropose(l as 

 genera. Henthani proposed tlie following sections: 



1. i!((tadasion Do'll.. — those with short spikelets with few 

 flowers and fragile rachilla. 



3. Flagiosiachi/(i, — the inflorescence approaching that of Chlori- 

 deae. 



3. 3f)/rioSi^achya, — a complicated inflorescence. 



4. Fe/ervessa Doell. , or Erayrostis proper, — many-flowered spike- 

 lets, with the racliilla continuous or rarely articulate when old, 

 floral glumes usually deciduous, leaving the palea persistent. Spe- 

 cies numerous and may be subdivided into three subsections : 



a. CijUndrostachym, — narrow almost terete spikelets. 



b. LepfosfacJiycp, — with narrow-linear flat spikelets. 



c. MeyasfaclujiB, — broad-linear or oblong flat spikelets. 



5. Flatystwhya, — broad, flat, many-flowered spikelets with 

 rather paleaceous glumes, and the rachilla ^articulate as in Cata- 

 clasfos. 



6. SderoHtachya, — paleaceous glumes and jfi'ticulate rachilla, as 

 those of Fhitystachya; but the spikelets are not so broad and the 

 rigid leaves are long and rushlike or short and pungent. 



A. A prostrate, creeping annual 1 



B. Erect or spreading annuals, panicle spikelike (a) 



a. Spikelets lO-oO-flowercd 2 



a. Spikelets i-i-flowered 3 



C. Diffuse annuals, not creeping, floral glume 1 mm. long, (b) 



b. Panicle spikelike, spikelets o-lO-flowcrcd 4 



b. Panicle spreading, spikelets 2-5-flowered 5 



D. Di'Tuse annuals, floral glume 2.T-3.8 nnn. long, panicle 

 spikelike, spikelets 4-24:-flowered G 



E. Ditt'use annuals, panicle not spikelike, floral glume usual- 

 ly 1-1.5 mm. long (c) 



c. Spikelets 2-5-flowered, floral glume 1.2-1.4 mm. long. 7 

 c. Spikelets 2-10-flowered. floral glume 1-1.2 mm. long. 8 

 c. Spikelets 2-4-flowered, floral glume 1.2-1.5 mm. long. 9 

 c. Spikelets 2-20-flowered, floral glume 1.5 mm. long. . 10 



