H88 



ORDER 155. GRAMINEJfi. 



at base. Glumes and pales awnless, subeqnal, of similar 



texture. Grain glabrous, free. Turfy grasses, none native. 



O. sclieiioides Lara. Tufted, glaucous, 3 12' ; Ivs. 23', long- 



pntd. ; apk. oblong. (I) Waste ground, E. Penn., Del., etc. Ear. 



14. ORYZOPSIS, MX. MOUNTAIN RICE. Spkl. 1-flwd. 

 in a slender spicate panicle. Gl. membranous at edge, 

 subequal, about equaling the oblong, terete, short-stiped 

 flower. Lower pale coriaceous, involute, enclosing the 

 grain, and tipped with a simple, jointed awn. U 



1 O. melanocarpa Mnhl. Culm leafy to the top, 1 IJf ; leaves 



lance-linear; rachis flexuons: few-flwd. ; gl. 5 6"; awn thrice 

 longer (10 than its blackish pale. y. Rocky woods and hills, Mid- 

 dle States, and northward. Aug. 



2 O. asperefsjlla MX. (a) -Culm 10 2(X, its sheaths leafless; Ivs. 1 or 2. subradical, 



erect, rigid, pungent. If; the simple pan. 2 4' long; gl. (6) whitish, 3"; awn crooked, 

 i" long, it? pale and grain whitish. 11 Woods, N. States and Canada. May. 



3 O. Caiiadensls (Poir.) Culm slender, 9 18', naked 



above ; lower sheaths bearing rigid, involute-filiform 

 leaves; pan. 12'; awn short or 0. Rocks. N. May. 



15. STIPA, L. FEATHER G. The flower de- 

 ciduous from the glumes with its sharp and 

 bearded stipe. Pales coriaceous, short, the lower 

 embracing the upper and the slender grain, and 

 bearing a long twisted or bent awn. if Leaves 

 narrow. Pan. loose. (See Addenda.} 



\ S. aveiiaeea L. Black Oat-Gf. (c) Culm naked above, 

 2 3f; Ivs. mostly radical, setaceous; pan. 46' long, 

 the capillary branches at length diffuse ; gl. (a) equal- 

 ing the blackish fruit; awn (6) 2 3' long, twisted be- 

 low, bent : common. July. 



2 S. juncea Pnrsh. Weather G. Culm 2 3f; leaves rolled-threadform, long; glume 



slender-pointed, twice longer than the fruit ; awn contorted, bent, 4 6' long. The 

 pungent stipe adheres like tick-seed. Prairies, 111., Mo., and N. May July. 



3 S. PENNATA. Feather G. From Europe. Culm 2f ; Ivs. rolled threadform at apex ; 



gl. awn-pointed, 1'; awn 8 16' long, twisted below, softly plumous above, and 

 " worn (says Gerard) by sundry ladies instead of feathers." Cultivated. 



16. ARISTIDA, L. BEARD G. POVERTY G. 



Panicle contracted and racemous. The flower 

 stiped in the unequal glumes. Lower pale with 

 3 awns at the tip variously conlorted. Culms 

 branching. Leaves narrow, often rolled. In 

 ?terile soils. Aug. Oct. 



Awns tw'sted and united below, jointed to 



the pale, very long No. 1 



Awns distinct to the base and not jointed to 



the pale... (a) 

 a Awns very unequal, the 2 lateral 1 times 



f-hori er (2") and erect Nos. 2, 8 



a A wns unequal, the 2 lateral twic< shorter 



(6") and pnborrct No. 4 



