CtASS III. ORDER n.] PHLEUM. 85 



unequal, pale, obtuse, slightly downy, the outer one large- 1, three or 

 five-ribbed. Sti/les short. Stijmas feathery. 



Hahitat. — 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'ii, Allioni. (Fig. 106.) Michelian Cafs-taU-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. lujlorescence 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. 



Hahitat. — 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 Cafs-lail-grass. Stems seve- 

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

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

 abrupt glumella. 



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

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

 p. 300. 



Root of numerous long downy and simple fibres. Stems 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, green. Glumes lan- 

 ceolate, terminating in a short ««•«, 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. 

 GlumclUi about one-third the. length of the glumes, membranous, oh- 



