158 GRAMINEAE. 
34. CINNA L. Sy ABA ices 
Tall grasses with flat leaves and panicled spikelets. Spikelets 1-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, 1-nerved. Stamen r. 
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 2''-2'4'’ long; first 
scale much shorter than the second. . 1. C. arundinacea. 
Panicle open, its capillary branches flexuous and drooping; spikelets 114’ long; first scale about 
equalling the second, 2. C. latifolia. 
1. Cinna arundinacea lL. Wood Reed-grass. (Fig. 360.) 
Cinna arundinacea I,. Sp. Pl. 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 1/’-2’’ long, trun- 
cate; leaves 6/-1° long, 2’’-7’’ wide, scabrous; 
panicle 6’-12’ in length, usually contracted, 
sometimes purple, the filiform branches erect or 
drooping, the lower 114’-4'%’ long; spikelets 
2/’-244’’ 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 4/’’ long from the 2-toothed apex. 
In moist woods and swamps, Newfoundland to 
the Northwest Territory, south to North Carolina, 
Louisiana, Missouriand Texas. Ascends to 1700 ft. 
in North Carolina. Aug.—Sept. 
2. Cinna latifolia (Trey.) Griseb. Slender Wood Reed-grass. (Fig. 361.) 
Agrostis 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 Ledeb. Fl. Ross. 4: 435. 
1853. 
Culms 2°-4° tall, erect, usually slender, simple, 
smooth and glabrous. Sheaths shorter than the 
internodes, sometimes slightly scabrous; ligule 
1//-2’’ long; leaves 4’-10’ long, 2’’-6’’ wide, scab- 
rous; panicle 5-10’ in length, open, the capillary 
branches generally spreading, flexuous and often 
drooping, the lower 114/-5’ in length; spikelets 
114” 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 14’/-1’’ 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, and in the Rocky Mountains 
to Colorado and Utah. Also in northern Europe. 
Ascends to 5000 ft. in the Adirondacks. Aug.—Sept. 
