32 TRIANDRIA — DIGYNIA. [Phleum. 



tveed) ; panicle cyliiulrlcal acuminate, glumes acute, hairs one 

 third of the length of the corolla. — Arimdo arenaria, E. Bot.t. 

 520. — Psamnia, Bemiv. 



S.indy sea-sliorcs, frequent. Fl. July. "U' — Root much creeping'. 

 Leaves long, narrow, rigicl, involute, glaucous. Culm 2 — 3 feet high. 

 Cor. far more rigid tlian the calyx, the larger valves with a small sinus 

 below the point. — Extensively employed in Norfolk, and Holland for 

 preserving the banks of sand wliich protect those countries from the in- 

 roads of the sea. A second species, A. Baltica, is found on the 

 shores of the Baltic. 



17. Phleum. Litin. Cat's-tail-grass. 



1. P. pratense, L. (Cot's-tail-ffrass, ThnotJnj- grass); panicle 

 spiked cylindrical, glumes truncated mucronate aristate ciliated 

 at the back longer than the awn. E. Bot. t. 1076. 



Meadows and pastures, ver\' common. P/. June. If. — Itoot some- 

 times tuberous, and then the plant is the P. nodosum, WUld. — Cal.- 

 glumes, as in all the s])ecies, extremely compressed, keeled with a dor- 

 sal green nerve running out into a spreading awn, scarcely half so long 

 as the valve. 



2. P. alpinum, L. {cdpine CaC s-tail-grass); panicle spiked ova 

 to-ohlong, cal. -glumes truncated mucronato-aristate ciliated at 

 the back equal in length to the awn. E. Bot. t. 519. 



Rare ; on the Brcadalbane mountains and Garway Moor. Fl. July. 

 2J!. — Spdte short, purplish. 



3. P. dsperum, Jacq. (rough Cat's-tail-grass) ; panicle spiked 

 cylindrical, cal. -glumes wedge-shaped mucronate rough, stem 

 often branched. E. Bot. t. 1077 (P. pajuculatiim). 



Rare in dry open fields, in the western and midland parts of England. 

 Fl. July. 0. — Culms verj'^ leafv, and the long s/jiAes are partly con- 

 cealed among them. Cal.-glumes tumid upwards. 



4. P. 2?w//we/7, Schrad. ( pnrple-sfalked Cat's- fail-grass) ; pani- 

 cle spiked cylindrical, cal.-glumes linear-lanceolate acuminato- 

 aristate downyat thekeel. E. Bot. t. 459 (Phalaris jyhleoides, L.). 



Dry sandy and chalky fields, rare ; principally in Norfolk and Cam- 

 bridgeshire. Fl. July. 14-. — Culms simple, erect, sparingly leafy, slen- 

 der, shining purple. 



5. P. Michelii, All. (Michelian Cat's-tail-grass); panicle spiked 

 cylindrical, cal.-glumes lanceolate acuminate strongly ciliated at 

 the back. E. Bot. t. 2265. — Phahiris alpina, Hoinke. 



Rocky parts of the high mountains of Clova, Scotland. Fl. July, 

 Aug. If. — Distinguishable at once from the preceding species by its 

 gradually tapering glumes. 



6. P. arendriiim, L. (sea Cat's-tail-grass) ; panicle spiked ob- 

 longo-obovate, cal.-glumes lanceolate acute ciliated at the back. 

 E. Bot. t. 222 (P/ialaris aren.) Book. Scot. i. p. 24. 



On loose sand, especially near the sea. Fl. May. June. Culms 



5—6 inches high, many from the same root. Cor. twice as short as the 

 cal., membranous, truncated. 



