TRIANDRIA.: DIGYNTA. 43 
these may all be considered as distinct, the United 
, States produce half as many species of this us 
as all the rest of the world besides, there bei nly 
40 enumerated by Persoon. In India there are 6 species, 
of which 2 produce spikes like Paspalum or Digitaria, and’ 
another species with the same anomalous habit in the isle 
of St. Helena; there is 1 species in Japan; 1 in Senge 
lin Teneriffe; 1 at the Cape of Good Hope; 3 in Arabia; 
1 in New Zealand; 4 in the West India islands; and all the 
rest in Europe; of which, several of the southern species 
are equally common to Barbary. Not one species from = 
South America, Northern Asia, or New Holland. 5 
This genus affords to the agriculturist some ef the 
ne important objects of cultivation both for pasturage 
artificial meadows, among these the .2. stolonifera 
with its numerous varieties is considered as the most : 
useful. * a : me 
69. CINNA, L. : 
Calix 2-valved, compressed, nearly equal. — 
_ €orolla linear, compressed, shortly stipitate, 
naked at the base; dorsal valve including the =~ 
inner, with a small awn near the summit. 
Stamen 1; style 1. Seed somewhat oblique. ~ 
Panicle large, reed-like, branches crowdéd, Wavingy” 
flowers compressed, approximating so as almost to ap- 
pear imbricated, smooth, wath conspicuous scariose mar: 
gins, leaves broad. i RR ge ae 
The Cinna differs greatly in habit from Agrostis as well 
as character; its habit is that of Arund», and the base of 
the corolla, which is shortly stipitate, is destitute of the — 
‘minute pubescent tufts which characterize the 2grostic. — 
The awn of the corolla is also extremely small. ee 
