430 
GENUS 9. CINNA. Linnceus. 
Glumes lanceolate, acute, strongly keeled, hispid serrulate on the keel; 
the lower rather smaller ; flowers stalked in the glumes, smooth, naked ; 
lower palea longer than the upper, short awned on the back below the 
pointless apex ; stamen one, opposite the one-nerved upper palea ; grain 
linear-oblong, free. Perennial; rather sweet-scented grasses, with sim¬ 
ple upright culms, (2 to 7 feet high,) bearing a large compound panicle, 
its branches in fours or fives, linear-lanceolate flat leaves, and conspicu¬ 
ous ligules. 
21. Cinna Arundinacea. Linnceus. 
Syn.— Agrostis cinna, Lamarck. Muhlenbergia cinna, Trin. 
Panicle spreading, large, loose ; lower glume and the upper palea about 
one-fourth shorter than the lower palea, which the upper palea barely 
equals ; spikelets much compressed, green, rarely purplish. Moist woods 
and shady swamps. Perennial; flowers in August. Culms 2 to 5 feet 
high. Wisconsin, Illinois, Michigan, Ohio and Minnesota. 
Plate I, fig. 4 .—a , a branch of the panicle ; b , spikelet magnified ; 
c, the same with the glumes removed ; d, a flower fully expanded. 
' 22. Cinna Pendula. Trinius. 
4^ ; * I t 
Syn. — C. suaveolens, Blytt. Muhlenbergia pendula, Bongard. 
Branches of the very loose panicle long and capillary, drooping; 
glumes slightly unequal, the lower nearly as long as the lower paleae ; 
upper paleae a little shorter. Spikelets about half the size of the prece¬ 
ding ; pedicels rough. Damp woods. Perennial ; flowers in August. 
Lake Superior—Mr. W. D. Whitney. 
GENUS 10. MUHLENBERGIA. Schreber . 
» . *». ■* • |. Jt ■ £ 4 i . 
(In honor of Dr. Henry Muhlenberg, of Pennsylvania.) 
Spikelets one-flowered, in contracted panicles; glumes mostly acute 
or bristle pointed, persistent; the lower rather smaller, minute ; flowers 
nearly or quite sessile in the glumes; paleae usually hairy-bearded at the 
base, herbaceous, deciduous with the inclosed grain,often equal; the 
lower three-nerved, mucronate or awned at the tip; stamens three. 
Panicles contracted or glomerate, terminpd and axillary. 
