CLASS III. ORDER II.] PHLETTM. 85 



unequal, pale, ohtuse, slightly downy, the outer one large t, three or 

 five-ribbed. Styles short. Stigmas feathery. 



Habitat, — Rare. In sandy or chalk fields in Cambridgeshire and 

 Norfolk. 



Perennial ; flowering in July. 



This grass growing naturally upon a sandy soil, is but little produc- 

 tive of herbage, and that of an inferior quality, rendering it of no value 

 for the purposes of cultivation. 



5. P. Michel a, M\iom. (Fig. \QQ.)Michelian CaVs-tail-grass. Stem 

 erect; panicle spiked, cylindrical ; glumes lanceolate, taper-point- 

 ed, downy, ciliated at the keel. 



English Botany, t. 2265. — English Flora, vol. i. p. 78. — Lindley, 

 Synopsis, p. .301. — Hooker, British Flora, vol. i. p. 35. 



Root fibrous. Stem erect, several arising from the same root, from 

 twelve to eighteen inches high, smooth, leafy below. Leaves plane, 

 roughish, tapering at the point. Sheaths rather long, upper ones 

 slightly inflated. Ligula obtuse. Inflorescence a close spiked panicle^ 

 green, or frequently purplish, from one to three inches long. Glumes 

 gradually tapering to a point, rough, with hairs, ribbed, the keel rigid 

 at the point, strongly ciliated at the back. Glumelles unequal, obtuse, 

 hairy, the outer one mostly five-ribbed, the inner smaller, often cloven 

 at the extremity. Styles short. Stigmas feathery. 



Habitat. — Rare. On the rocky parts of the high mountains of Clove, 

 Angusshire, Scotland. 



Perennial ; flowering in July. 



6. P. arena' rium, Linn. (Fig. 107.) sea CaCs-tail-grass. Stems seve- 

 ral from the same root; panicle spiked, oblongo-ovate ; glumes 

 lanceolate acute, ciliated on the back, much longer than the 

 abrupt gluraella. 



English Flora, vol. i. p. 79. — Hooker, British Flora, vol. i. p. 35. — 

 Phala'ris arena'ria, t. 222. — Achno'dun arena'rius, Lindley, Synopsis, 

 p. 300. 



Root of numerous long downy and simple fibres. .Sterns nearly erect, 

 several from a single root, enveloped at the base and lower joints with 

 thin membranous sheaths, branched and leafy, from three to six inches 

 high. Leaves linear, thin, somewhat glaucous, rough on the edges, 

 upper ones shorter, with long, smooth, striated, slightly inflated sheaths. 

 Ligula lanceolate, decurrent. Inflorescence spicate, dense, rigid, from 

 half an inch to an inch long, nearly cylindrical, j^reen. Glumes lan- 

 ceolate, terminating in a short aun, strongly keeled and ciliated, a rib 

 on each side, green between the ribs and keel, the rest of the valves 

 thin, pale, membranous, hairy on the edge, rough towards the apex, 

 Qiumelia aoout Qne4hird the length ef the gluinesj thembranous, oh- 



