358 ENDOGENOUS PLANTS 



2. A. SC'.itora, Willd. Culm erect, very slender ; panicle pur- 

 plish, the spikelets clustered at the ends of the long capillary 

 branches. 



Trichodium laxiflorum. MX. $ FL Cestr. ed. 2. p. 54. 

 ROUGH AGROSTIS. Hair-Grass. 



Culm 1 to 2 feet high. Lower leaves 3 to 6 inches long, becoming involute and 

 almost filiform ; upper ones, 1 to 3 inches long, flat, scabrous ; sheaths rather open, 

 roughish. Panide very loose ; branches verticillate, the lower ones in fives or 

 sixes, the upper in threes, sharply scabrous, long, and hair-like ; palea awnless. 

 Hob. Old fields ; Serpentine ridge : frequent. Fl. June. Fr. Aug. 



2. AGROSTIS proper : Upper palea manifestly present. 



3. A. vulgaris, With. Culms mostly erect ; panicle ovoid-oblong in 

 its outline, usually purple ; ligule truncate, very short. 



COMMON AGROSTIS. Herd's-Grass (of Pennsylvania]. Red-top. 



Culms 6 inches to 2 feet high, slender, cespitose. Leaves 3 to 6 or 8 inches long, 

 roughish. Panide with the branches alternatingly semi-verticillate, spreading, 

 finally divaricate. Paleae awnless, the lower one twice the size of the upper. 

 Hjb. Moist meadows, and pastures. Nat. of Europe. Fl. July. Fr. Aug. 



Obs. This was formerly cultivated, here : but it was not much 

 esteemed, and is now generally neglected. It is, however, very 

 thoroughly naturalized. It should be borne in mind, by dealers in 

 Seeds, that this is not the " Herd's-Grass" of New York, and New 

 England. The Phleum pratense is so called, in those States ; and 

 the confusion has sometimes led to mistakes, and litigation. I am 

 not quite satisfied that we have the A. alba here, and therefore 

 omit it from our Flora, for the present. 



CIIV'JVA, L. 



[A name of uncertain derivation.] 



Spikelets compressed, crowded in a large flaccid panicle. Glumes 

 lanceolate, acute, with scarious margins, and hispid-serrulate keel, 

 the lower one rather smaller. Florets stipitate, smooth, naked at 

 base; lower palea longer than the upper, short-awned on the back. 

 Stamen 1, opposite the 1-nerved upper palea! Perennial, and 

 rather stout, woodland grasses: culms simple; panicle terminal, 

 compound. 



1. C. arimdiliacea, L. Panicle spreading below, contracted 

 or tapering at summit ; lower glume one fourth shorter than the 

 lower palea. 

 REED-LIKE CINNA. 



Culm 2 to 4 or 5 feet high, erect, smooth. Leaves a foot or more in length ; 

 sheaths smooth, striate ; ligule membranaceous, elongated, lacerate. Panide 6 to 

 12 inches long, somewhat nodding, the branches somewhat in fours; spikelets 

 glaucous-green, or sometimes purplish. 

 Hab. Moist woodlands and thickets : frequent. FL Aug. Fr. Sept. 



4?3. MUHL.ENBERG'IA, Schreber. 



[Dedicated to Rev. Henry Muhlenberg, D. D.; a distinguished American Botanist.] 

 Spikelets mostly in contracted panicles. Glumes acute, or bristle- 

 pointed, persistent, the lower one rather smaller, sometimes very 



