158 



GRAMINEAE. 



34. CINNA L. Sp. PI. 5- 1753- 

 Tall grasses with flat leaves and panicled spikelets. Spikelets i-flowered. Scales 3; the 

 2 outer empty, keeled, acute; the third scale similar, but usually short-awned on the back, 

 subtending a palet and a stalked perfect flower; palet a little shorter, i-nerved. Stamen i. 

 Styles short, distinct. Stigmas plumose. Grain narrow, free, enclosed in the scale and 

 palet. Seed adherent to the pericarp. [Greek, taken from Dioscorides.] 



Four known species, inhabiting the temperate regions of Europe and North America. Besides 

 the following, another occurs in the western United States. 



Panicle narrow at maturity, its filiform branches erect or drooping; spikelets a"-2^" long: first 

 scale much shorter than the second. i. C. arundinacea. 



Panicle open, its capillary branches flexuous and drooping; spikelets iK" long; first scale about 

 equalling the second. 2. C. latifolia. 



i. Cinna arundinacea L. Wood Reed-grass. (Fig. 360. ) 



Cinna arundinacea I<. Sp. PI. 5. 1753. 



Culms 2-5 tall, erect, simple, smooth and 

 glabrous. Sheaths usually shorter than the in- 

 ternodes, overlapping at the base of the culm, 

 smooth or roughish; ligule i // -2 // long, trun- 

 cate; leaves 6'-i long, 2 // ~7 // wide, scabrous; 

 panicle 6 / -i2 / in length, usually contracted, 

 sometimes purple, the filiform branches erect or 

 drooping, the lower \yz'-^ l /t f long; spikelets 

 2 // -2^ // in length, the scales acute, scabrous, 

 especially on the keel, the first one shorter than 

 the second; third scale slightly exceeded or 

 equalled by the second, usually bearing an awn 

 about %" long from the 2- toothed apex. 



In moist woods and swamps, Newfoundland to 

 the Northwest Territory, south to North Carolina, 

 Louisiana, Missouri and Texas. Ascends to 1700 ft. 

 in North Carolina. Aug. -Sept. 



2. Cinna latifolia (Trev.) Griseb. Slender Wood Reed-grass. (Fig. 361.) 



Agroslis latifolia Treviran, in Goeppert, Beschr. d. 



Bot. Gart. Breslau, 82. 1830. 

 Cinna pendula Trin. Mem. Acad. St. Petersb. (VI.) 



6: 280. 1841. 



Cinna latifolia Griseb. in I<edeb. *F1. Ross. 4: 435. 

 1853- 



Culms 2-4 tall, erect, usually slender, simple, 

 smooth and glabrous. Sheaths shorter than the 

 internodes, sometimes slightly scabrous; ligule 

 i "-2" long; leaves 4 / -io / long, 2 // -6' / wide, scab- 

 rous; panicle s'-io' in length, open, the capillary 

 branches generally spreading, flexuous and often 

 drooping, the lower i^'-s' in length; spikelets 

 i Yz" long; scales scabrous, the outer acute, strongly 

 hispid on the keel, the first about equalling the 

 second; third scale usually exceeded by the second 

 and bearing a rough awn j"-i" long from the 2- 

 toothed apex. 



In damp woods, Newfoundland to British Colum- 

 bia, south to New Jersey, in the Alleghanies to North 

 Carolina, to Wisconsin, ami in the Rocky Mountains 

 to Colorado and Utah. Also in northern Europe. 

 Ascends to 5000 ft. in the Adirondacks. Aug -Sept 



