142 



GRAMINEAE. 



Vol. I. 



14. Panicum anceps Michx. Beaked or Flat-stemmed Panic-grass. 



Fig. 324. 

 1803. 



Panicum anceps Michx. Fl. Bor. Am. 1 : 

 Panicum rostrahtm Muhl. Gram. 121. 1817. 



Culms erect from a creeping scaly branched root- 

 stock, ii°-6° tall, much branched, compressed, 

 stout, smooth. Sheaths compressed, glabrous, or 

 the lower ones pubescent; blades i° long or more, 

 2"-$" wide, acuminate; ligule very short; panicles 

 pyramidal, 6'-i6' long; axis and ascending branches 

 scabrous; spikelets ii"-if" long, crowded, lanceolate, 

 acuminate, curved, longer than the scabrous pedicels; 

 first scale less than one-half as long as the spikelet; 

 second and third scales curved at the apex, much 

 exceeding the fourth scale which is minutely pubes- 

 cent at the apex. 



Moist soil, Rhode Island to Kansas, south to Florida 

 and Texas. July-Sept. 



Panicum rhizomatum Hitchc. & Chase, differing in 

 smaller spikelets and narrower panicle, occurs from Vir- 

 ginia to Florida and Texas. 



15. Panicum agrostoides Spreng. Red-top 

 Panic. Fig. 325. 



Panicum agrostoides Spreng. Pugill. 2: 4. 1815. 



Culms erect, ii°-3° tall, much branched, com- 

 pressed, smooth. Sheaths compressed, glabrous, or 

 sometimes hairy at the throat; ligule very short, 

 naked; leaves 1° long or more, 2"-4" wide, acumi- 

 nate; panicles pyramidal, 4'-i2' long, terminating 

 the culm and branches; primary branches of the 

 panicle spreading, secondary appressed or divergent; 

 spikelets l"-i" long, acute, straight, on usually 

 sparsely hairy pedicels; first scale 3-nerved, acute; 

 second and third scales 5-nerved, about twice as long 

 as the first and longer than the oval fourth scale, 

 which is sessile. 



Wet ground, Maine to Minnesota, south to Florida 

 and Texas. July-Sept. 



16. Panicum condensum Nash. 

 Panic-grass. Fig. 326. 



Dense 



Panicum condensum Nash, in Small, Fl. SE. U. S. 

 93- 1903- 



Culms 2\°-i,V tall ; sheaths smooth and gla- 

 brous; ligule i" wide; blades 8'-2o' long, 4"-6" 

 wide, flat or folded ; primary panicle up to i° 

 long, narrowly oblong, the branches erect, the 

 spikelets densely arranged, the lower branches 

 naked at the base, the secondary panicles similar 

 but smaller and produced on long peduncles from 

 the upper sheaths; spikelets about i"-ij" long, 

 .glabrous, acute, on glabrous short pedicels. 



Wet places and along streams, southern New Jersey 

 and Pennsylvania to Virginia and Florida ; also in 

 the Bahamas, Cuba and Guadeloupe. Aug. and Sept. 



