TRIANDRIA. DIGYNIA. 45 



these may all be considered as distinct, the United 

 Slates produce half as many species of this genus 

 as all the rest of the world besides, there being only 

 40 enumerated by Persoon. In India there are 6 species, 

 of which 2 produce spikesVike Faspalum or Big-itati a, ^nd 

 another species with the same anomalous habit in the isle 

 of St. Helena; there is 1 species in Japan; 1 in Senegal; 

 1 in 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. 



This genus affords to the agriculturist some ©f the 

 most important objects of cultivation both for pasturage 

 and artificial meadows, among these the ^1. stolonifera 

 with its numerous varieties is considered as the most 

 useful. 



69. CINNA. L, 



Calix 2.valved, compressed, nearly equal. 

 Corolla 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 st)mewhat oblique. 



Panicle large, reed-like, branches crowded, waving; 

 flowers compressed, approximating so as almost to ap- 

 pear imbricated, smooth, with conspicuous scariose mar- 

 gins, leaves broad. 



The Cif77ia differs greatly in habit from Agrostis as well 

 as character; its habit is that of AmndOy and the base of 

 the corolla, which is shortly stipitate, is destitute of the 

 minute pubescent tufis which characterize the Jgrosiis. 

 The awn of the corolla is also extremely small. 



70. CALAMAGROSTIS. Roth. (Species of 

 Arundo and Agrostis. L.) (Reed Bent* 

 grass.) 



Calix 2-valved, 1 flowered, valves acute or 

 acuminate. Corolla 2-valved, mostly shorter 



length of '.he corolla, which is of a leaden purple» sometimes 

 subj« ct to monstrosity, forming a nut like a Scleria! 



Hab. In sterile naked plains and arid argillaceous soils, near 

 Fort jNIandan on the Missouri. 



