60 BULLETIN 772, IT. S. DEPARTMENT OF AGRICULTURE. 



Trisiola Raf., Fl. Ludov. 144. 1817. A single species, T. paniculata, based 

 on Uniola paniculata L., is included. 



Nevroctola Raf., Neogenyt. 4. 1825. "Type Uniola maritima or paniculata." 

 Uniola maritima Michx. is U. paniculata L. 



Chasmanthium Link, Hort. Berol. 1 : 159. 1829. A single species, C. gracile, 

 based on Uniola gracilis Michx., is included. This is* the .same as L'. hu-a (L.) 

 B. S. P. 



Uniola paniculata, seaside oats, common on the coastal sand dunes 

 from Virginia to Texas, is a stout, pale grass, with extensively creep- 

 ing rhizomes, long-attenuate, firm blades, and large, drooping, heavy, 

 rather compact panicles of large, flat, stramineous spikelets. It is an 

 excellent sand binder. Uniola latifolici Michx. (PI. VI; fig. 25) is 

 a woodland grass with broad flat blades and handsome, open, droop- 

 ing, rather few-flowered panicles of large, very flat green spikelets. 

 The species is worthy of use in landscape gardening. This and the 

 remaining species of Uniola are of minor importance as forage 

 grasses, as they are not sufficiently abundant. The seeds of U. pal- 

 meri Vasey are used for food by the Cocopa Indians. 



19. ARUNDO L. 



Spikelets several-flowered, the florets successively smaller, the 

 summits of all about equal, the rachilla glabrous, disarticulating 

 above the glumes and between the florets ; glumes somewhat unequal, 

 membranaceous, 3-nerved, narrow, tapering into a slender point, 

 about as long as the spikelet; lemmas thin, 3-nerved, densely long- 

 pilose, gradually narrowed at the summit, the nerves ending in 

 slender teeth, the middle one longer, extending into a straight awn. 



Tall perennial reeds, with broad linear blades and large plumelike 

 terminal panicles. Species about six, in the warmer parts of the 

 Old World ; one introduced in America. 



Type species: Arundo donax L. 



Arundo L., Sp. PI. 81, 1753 ; Gen. PI., ed. 5, 35. 1754. Linmeus describes six 

 C) represents the spikelets of Arundo donax, which is fully described on page 

 Genera Plantarum is " Scheuch. 3: 14, 3." Scheuchzer's figure 14 (A, B, and 

 C) represents the spikelets of Arundo donax, which is fully described on page 

 159 of Scheuchzer's work, Agrostographia. Hence, Arundo donax, the second 

 species described by Linnreus, is the type species of the genus. The other 

 original species are now referred as follows : A. bambos to Bambos, A. phrag- 

 mites to Phragmites, A. epificjos and A. calamoffrostis to Calamagrostis, .1. 

 arenaria to Ammophila. 



Armulo donax, the giant reed (PI. VII; fig. 26), is cultivated as an 

 ornamental grass for lawn groups or borders. In tropical America 

 it is frequently used for hedges, and the stems are utilized for a 

 variety of purposes, such as the making of lattices in the construction 

 of huts. The giant reed has become naturalized in the Southwestern 

 States and sometimes forms a dense growth along irrigation ditches. 

 There is a cultivated ornamental variety with white-striped blades 

 (A. donax versicolor (Mill.) Kunth) . This was mentioned in Miller's 

 Gardener's Dictionarv in 1768 as Arundo versicolor. 



