GRAMINE.E. (GRASS FAMILY.) 637 



1. E. saccharoides, Michx. (PI. 14, fig. 1,2.) Culm (4-6° high) 

 woolly-bearded at the joiuts ; panicle contracted ; the silkij hairs longer than the 

 spikelets, shorter thau the awn ; stamens 2. (E. alopecuroides, A'//.) — Wet 

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



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

 upper joiuts ; panicle rather open ; silky hairs shorter tlian the spikelets. — 

 Low grounds, Va., and southward. 



14. ANDROPOQON, Royen. Beard-Grass, (ri. 14.) 



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

 one of them pedicelled and sterile (stamiuate, 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 dvi)p, man, and irwywv, heard). 



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



1. A. furcatUS, Muhl. (PI. 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; 

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

 mon in dry sterile soil. Aug. - Oct. 



* * Spikes with slender often zigzag rhachis, silk ij -villous ^ 



*- Single and scattered along the branches, with the silkij hairs shorter than the 

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



2. A. seoparius, 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, theii 

 compressed sheaths imbricated ; panicle short ; peduncles included Avithin 

 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. 



-~ -t- 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 fower monandrous, its 

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



4. A. argenteus, Ell. Smooth; culms rather slender (1-3° higli); 

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



