402 97. GRAMINEA. 
remarkably bent downwards at the second or third ae 
a salt marsh near Gravesend. Mr. Dickson. P. VII. : 
48. Horpeum Linn. Barley. 
1. H. sylvaticum (Iluds.); glumes all awlshaped not ciliated 
rough, lateral fl. perfect, middle fl. often barren, outer pale with 
an awn of twice its length.— P. 130. Elymus europeus Linn., 
Sm., E. B. 1317.—Closely resembling H. pratense. Middle f., 
if barren, with shorter glumes which have their edges volute 
so as to appear setaceous. The spikelets have a second fl. oc- 
casionally.— Woods and thickets on a calcareous soil. P. VII. 
VIII. E. 
2. H. pratense (Huds.); glumes all setaceous not ciliated 
rough, lateral fl. imperfect, outer pale of the fertile middle fl. with 
an awn of about its length.—E. B. 409. P. 11.—Glumes of the 
lateral fl. shorter—Damp meadows. A. VII. 
3. H. murinum (L.); glumes of the middle spikelet linear- 
lanceolate ciliated, of the lateral ones setaceous rough, lateral fl. 
imperfect.— BE. B. 1971. P. 10.—Awn longer than the outer 
pale. Lateral gl. sometimes slightly cihate—f. arenarium 
(Bab.); lower part of the st. buried, lengthened and rooting, 
thus appearing to have a creeping root.— Waste places. 8. Sands 
on the sea-shore. A. VI. VII. 
4. H. maritimum (Wither.); gl. scabrous, immer one of the 
lateral fl. half-ovate, the rest setaceous, lateral fl. imperfect.— 
E. B. 1205. P. 10.—The smallest species——Sandy pastures 
near the sea. A. VI. 
Tribe XIII. Rottboellice. 
49. Narpus Linn. Mat-grass. 
1. N. stricta (L.).-—E. B. 290. P.2.—St. and 1. erect, slender, 
rigid. Height 5—8 in. Spike close. Outer pale with a short 
rough awn, coriaceous, often purplish; mner membranous.— 
Moors and heaths. P. VII. 
50. Lerrurus &. Br. 
1. L. incurvatus (Trin.) ; spike cylindrical-subulate, gl. 2 
equalling or slightly longer than the flowers.—Rottboellia Sm., 
E. B. 760. P. 2.—S8t. 2—6 in. long. Spike long, curved when 
dry.—8. filiformis; spikes much more slender filiform scarcely 
atalleurved. L. filiformis (Trin.?), Parn. 3.—Sandy salt marshes. 
A. VIL. 
