CLASS III. ORDER III. 45 



Andropogon furcatus. Muhl. Forked Beard grass. 



Spikes digitate, about four ; barren floret awnless ; 

 perfect floret awned; racliis hairy. 



Four or five feet high, divided at top into a few diverging hairy 

 spikes. Rachis, pedicels of the barren flowers, and calyx of the 

 fertile ones, hairy. Awns twisted, slightly bent. — Dry fields. — 

 August, September. — Perennial. 



§ Subgenus Pollinia. Barren florets awned. 

 Andropogon purpurascens. Miihl. Broom grass. 



Branches straight, appressed, each with from two 

 to fotir spikes on smooth pedicels of diflerent lengths; 

 rachis ciiiate. 



Very common in dry barren soils, its spikes having a hairy 

 appearance. Culm three feet high, very slender. Branches 

 deeply divided into several stalks, one usually very short and 

 axillary, another long and slender, each bearing a small leaf. 

 Rachis and calyx very hairy, corolla nearly smooth, with a 

 twisted awn. — August, September. — Perennial. 



49. HOLCUS, 



HoLcus LANATUs. L. Vclvct grass. 



Panicle equal ; calyx two flowered ; lower floret 

 perfect, awnless ; upper floret barren, with a recurved 

 awn included in the calyx ; root fibrous. 



An exceedingly soft grass covered throughout with a whitish 

 downy pubescence, sometimes tinged with purple. Culm two 

 or three feet high. Leaves linear-lanceolate. Calyx glumes 

 mucronate. Upper floret barren, with a short awn which is 

 straight at first, but at length recurved. Meadows, Watertown. 

 — June. — Perennial. 



§ Subgenus H.i'EKOcni.OA. Calyx three flowered ; lateral ones 

 triandrous, barren ; central one diandrous, perfect. 



HoLcus ODORATus. L. Seucca grass. 



Panicle glabrous ; florets ciiiate, about as long as 

 the calvx. 



