GRAMlXEiE. 429 



Moist wood.- and thickets, common. June, July. Culm, 1 to 2 feethitrh, smooth, 

 the joints and margins of the smooth sheathe bearded with soft woolly hairs. 

 Leaves broadly oblong lanceolate from a heart-clasping base, often 1 inch wide. 

 Panicle 2 inches long, with downy branches. 



9. P. clandestinum, L. Hidden-flowered Panic-grass. 



Sheaths hispid, enclosing the short lateral panicles ; spikelets ovoid, pubescent, 

 the lower flower neutral, with 2 paieflfc 



Low thickets and river banks. Aug. OiOm 1 to 3 feet high, very leafy to the 

 top. at length producing appresscd branches. Leaves oblong-lanceolate, from a 

 heart-clasping base, very acuminate. Panicles terminal and lateral, the former 

 ■wholly concealed in the leaves, exserted, or on a long peduncle. Anthers and sttjf- 

 mas purple. 



lft. P. MICROCARPON, Muhl. Small-pointed Panic grass. 



Panicle soon exserted, very many-flowered, narrowly oblong; spikelds long, 

 ovoid, smoothish; lower glume orbicular, very small. 



Thickets. July. Culm, 1 to 2 feet high, smooth, the joints and the orifice of 

 the throat of the sheaths bearded with soft woolly hairs. Leaves broadly lanceo- 

 late, rough-margined, bristiy-ciliate. Panicle Z-to 7 inches long. 



11. P. paucifloru M, Ell. Small-flowered Panic-grass. 



Panicle open, nearly simple, bearing few tumid-obovate hairy or smoothish. 

 spikelets ; lower ghuM % to y 2 tlie length of the upper one. 



Wet meadows and copses. June, July. Culm 1 to 2 feet high, at length much 

 branched and reclining, roughish. Leaves lanceolate, 2 to 5 inches long, % to J^ 

 inch wide, faintly 9- nerved, hairy or smooth, fringed on the margin. 



12. P. DICHOTOMUM, L. Variable Panic-grass. 



Pinicle small, lateral, nearly simple; spikelets minute, on long peduncles, obo-- 

 void, msstly pubescent; lower glume Yi tne length of the upper; lower Jlowcr 

 neutral, the upper palere minute. 



Moist meadows and wood.-:. July — S>pt. Culms 8 to 20; inches high, at first 

 mostly simple, bearing a more or less exsert d' compound spreading panicle, I to 3 

 inches long. Leaves lanceolate, fiat, the radical tufted ones, ovate-lanceolate, very 

 short, thickish. Panicle changing its form, often purplish. A very variable Bp .- 

 cies, embracing V. nodidoruui, pubescens, laxitioruui, and nitidum of Lam. i'. 

 barbulatum and ramulosum of Michx. 



13. P. depauperatum, Muhl. Few-flowered Panic-grass. 



Panicle simple, contracted, few-flowered, often over-topped by the narrowly 

 linear upper leaves; spikelets oval-obovate, commonly poinied when young; lower 

 glume ovate, x / z the length of the 9-nerved upper one. 



Dry wools and hills, common. Jua>. C-i'ms simple or. branched at the base, 

 forming close tufts, 6 to 12 inches high. Leaves short, becoming longer above, 

 narrow-linear, hairy beneath. Panicle 4 to 7 inches long. Varies with the leaves 

 often involute. 



14. P. VERRUGOSUM, Muhl. Warty Panic-grass. 



Smooth; panicle capillary, widely spreading, few-flowered; spikelets oval, acute,- 

 warty-roughened, dark green ; lower glume % the length of the upper one. 



Sandy swamps. Aug.. Sept. Calm 1 to 2 feet high, branching and spreading, 

 very slender, naked above. Leaves narrow, smooth, spreading. 



15. P. Crus-GALLIj L. Barnyard-grass. 



Spikes alternate, crowded in a dense panicle; glumes ovate, abruptly pointed. 

 lower palexe of the neutral flower bearing a rough awn of variable length. 



"Wet places, near barn-yards. Aug., Sept. Ann. Cuhn 2 to 4 feet high, terete, 

 smooth, stout, branching from the base. Leaves lanceolate ; % inch or more wide, 

 rough-margined Spike* 1 to 3 inches long. 



