GRAMINE.E. (grass FAMILY.) 649 



31. CINNA, L. Wood Reed-Grass. (PI. 8.) 

 Spikelets l-fiowered, much flattened, crowded in an open flaccid panicle. 

 Empty glumes persistent, lanceolate, acute, strongly keeled, rough-serrulato 

 on the keel ; the iower rather smaller, the upper a little exceeding the flower, 

 which is manifestly stalked, smooth and naked ; flowering glume much like 

 the lower, longer than the palet, usually short-awned or mucronate on the 

 back below the. pointless apex, iitamen one, opposite the 1-nerved palet I 

 Grain linear-oblong, free. — A perennial, rather sweet-scented grass, with 

 simple and upright somewhat reed-like culms (2-7° high), bearing an 

 ample compound terminal panicle, its branches in fours or fiives ; the broadjy 

 linear-lanceolate flat leaves (4-6" wide) with conspicuous ligules. Spikelets 

 green, often purplish-tinged. (From Kivpa, a name in Dioscorides for a kind 

 of grass.) 



1. C. arundinacea, L. (PI. 8, fig. l, 2.) Panicle 6 -15' long, rather 

 detise, the branches and pedicels spreading in flower, afterward erect ; spike- 

 lets 2|- 3" long ; awn of the glume either obsolete or manifest. — Moist woods 

 and shaded swamps ; rather common. July, Aug. 



2- C. p^ndula, Trin. Panicle loose and more slender, the branches nearly 

 capillary and drooping in flower ; pedicels very rough ; glumes thinner, the 

 lower less unequal; spikelets 1^-2" long; palet obtuse. (C. arundinacea, 

 var. pendula. Gray.) — Deep damp woods, N. New Eng. to Lake Superior and 

 northward, and on mountains southward. (Eu.) 



32. A P E R A, Adans. 



With the characters of Agrostis ; distinguished by the presence of a second 

 rudimentary flower in the form of a short bristle, and by the 2-toothed palet 

 little shorter than the flowering bifid glume, which is dorsally awned. — A 

 rather late annual, with narrow flat leaves, and a contracted or spreading pan- 

 icle with numerous filiform branches and very numerous small shining spike- 

 lets. (Name from ainjpos, unmaimed ; application obscure.) 



A. spiCA-vENTi, Beauv. Spikelets ■^- 1'' long. — Sparingly naturalized 

 (Nat. from Eu.) 



33. CALAMAGROSTIS, Adans. Reed Bent-G. (PI. 8.) 



Spikelets 1-flowered, and (in our species) often with a pedicel or rudiment 

 of a second abortive flower (rarely 2-flowered), in an open or spiked panicle. 

 Lower glumes mostly membranaceous, keeled or boat-shaped, often acute, 

 commonly nearly equal, and exceeding the flower, which bears at the base 

 copious white bristly hairs ; flowering glume thin, bearing a slender awn on 

 "/he back or below the tip, or sometimes awnless ; the palet mostly shorter. 

 Stamens 3. Grain free. — Perennials, with running rootstocks, and mostly 

 tall and simple rigid culms. (Name compounded of /caAa/tos, a reed, and 

 ayp6(Tris, a grass.) 



§ 1. DEYEUXIA. Rudiment of a second flower present in the form of a plu- 

 mose or hairy small pedicel behind the palet [very rarely more developed and 

 having a glume or even stamens) ; glumes membranaceous, or the flowering 

 one thin and delicate, the latter 3 - b-nerved and awn-bearing. 



« Panicle loose and open, even after flowering ; the mostly purple-tinrjed or lead- 

 colored strigose-scabrous glumes not closing in fruit ; copious hairs of the 



