GRAMINE^E. (GRASS FAMILY.) 637 



1. E. saccharoides, Michx. (Pi. u, fig. 1,2.) Culm (4-6 high) 



woolly-bearded at the joints ; panicle contracted ; the silky hairs longer than the 

 spikelets, shorter than the awn ; stamens 2. (E. alopecuroides, Ell.) Wet 

 pine-barrens, from N. J. and 111. southward ; rare. Sept., Oct. 



2. E. brevibarbis, Michx. Culm (2 - 5 high), somewhat bearded at the 

 upper joints ; panicle rather open ; silky hairs shorter than the spikelets. 

 Low grounds, Va., and southward. 



14. ANDROPOGON, Royen. BEARD-GRASS. (PL 14.) 



Spikelets in pairs upon each joint of the slender rhachis, spiked or racemed, 

 one of them pedicelled and sterile (staminate, pistillate or neutral), often a 

 mere vestige, the other sessile, 1 -flowered and fertile; lower glume the larger, 

 coriaceous and nerved, blunt, the second carinate and acute, the 2 upper hya- 

 line, the flowering glume awned from the tip. Stamens 1-3. Grain free. 

 Coarse, mostly rigid perennials, mostly in sterile or sandy soil ; with lateral 

 or terminal spikes commonly clustered or digitate ; the rhachis hairy or plu- 

 mose-bearded, and often the sterile or staminate flowers also (whence the 

 name, composed of dvfip, man, and ircayw, beard). 

 * Spikes digitate, thickish, short-bearded, the sterile spikelet staminate ; stamens 3. 



1. A. furc&tUS, Muhl. (PL 14, fig. 1-3.) 'Tall, 3-4 high, rigid, the 

 naked summit of the culm (and usually some lateral branches) terminated by 

 2-5 rigid spikes ; spikelets approximate, appressed ; hairs at the base of the 

 fertile spikelet, on the rhachis and on the stout pedicel of the awnless stami- 

 nate spikelet short and rather sparse ; awn of fertile flower long and bent j 

 leaves flat, roughish, the lower ones long. ("A. provincialis, Lam") Com- 

 mon in dry sterile soil. Aug. - Oct. 



* * Spikes with slender often zigzag rhachis, silky -villous, 

 H- Single and scattered along the branches, with the silky hairs shorter than the 

 flowers; sterile spikelet conspicuous but mostly neutral ; the fertile triandrous. 



2. A. SCOp&rius, Michx. Culms slender (1-3 high), with numerous 

 paniculate branches ; lower sheaths and narrow leaves hairy ; spikes slender, 

 scattered, mostly peduncled (1 - 2' long), very loose, often purplish, silky with 

 lax dull-white hairs ; sterile spikelet awn-pointed or awnless ; the fertile about 

 half the length of its twisted or bent awn. Dry ground. July- Sept. 



3. A. maritimus, Chapm. Smooth and glaucous; culms ascending 

 from creeping rootstocks, 1 - 1 high ; leaves rather rigid, divaricate, their 

 compressed sheaths imbricated; panicle short; peduncles included within 

 the conspicuous bracts ; rhachis and pedicels copiously ciliate with spreading 

 hairs ; glumes larger, 3 - 4" long. Sandy sea-coast ; Cape May, and south 

 to Fla. 



*- -i- In pairs or clustered ; the copious soft-silky hairs much longer than the flow- 

 ers; sterile spikelet a small neutral rudiment (in n. 4 and 5), or altogether 

 wanting on the very plumose-hairy pedicel ; fertile flower monandrous, its 

 awn capillary ; leaves narrow, the lower or their sheaths often rather hairy. 



4. A. arg6nteus, Ell. Smooth; culms rather slender (1-3 high); 

 spikes in pairs (rarely in fours) on short mostly exserted and loosely panicu* 



