^ TRIi^DRIA. xMOXOGYXIi. iJ 



Invested by the corolla." Schrader. (Glumes 

 of the calix membranaceous, resembling foUi- 

 cles.) 



Flowers in spreading- or contracted panicles, valves of 

 the covolia often becoming- coriaceous. 



J^PECiES. 1. A. peMiflvcaiica 2. pnhistris, (nearly allied 

 to the genus Aira) 3. striata. 4. mo('^is. 



Of this genns there are muny species in Europe, m Har- 

 bary, and at the Cape of Good Hope. A single species 

 has been found at the extremity of South America. 



106, ARUNDO. L. (Reed.) 



Calix 2-valvod, maiiy-flowered. Corolla 

 smooth, surrounded at the base by a long vil- 

 lous wool. 



Subaquatic: culm tall, in some species perennial; pani- 

 cle large, diffusely branchinj^; calix 2 to 5-fiowered; g-e- 

 nerally long-, smooth, and membranaceous, with flowers 

 of nearly the same form, alternately ag-gregated, often 

 sliortly and straig-htiy awned, and always surrounded at 

 the base with a persistent, conspicuous villous involu- 

 C!um The genus Arwido is nearly related to Saccharum, 

 but in the latter the calix, instead' of the corolla, is sur- 

 rounded by a villus. 



Species. I. .^. Phra^mites. 2. airoides. 



The genus Crunch, exists in Furope, in Barbary, in In- 

 d"a, and North America. The A. I)o7iax, and A. mauri' 

 tunica qf Algiers, are shrubs, and the laiter is there made 

 use of to construct hedges for gardens. 



ffff Flowers collected into spikes; common recep- 

 tacle viostly scrobiculate, 



lOr. ELF.USINE. G(trtner. Lamark. 



Spikes digitate. — Flowers awnless, disposed 

 on one side of the rachis (or recepta( le.) Calix 

 carinate, many-flowered, dorsal valve larger, 

 5to9-nerved. Coro//a 2-valved, awnless. (Flow- 

 ers all hermaphrodite.) 



Low decumbent grasses, growing in the sands of the 

 sea-coast, or in arid wastes. Culm simple, many from the 

 iame root, terminated by disjitaie clusters of' one-sided 



