412 97. GRAMINEA. 



root creeping. — L. having a deciduous row of hairs on the ridges 

 as in T. repens, not keeled. Spikelets often approximate. St. 

 prostrate or ascending. Producing decumbent barren leafy shoots. 

 — Sandy sea-shores, probably not rare. P. VII. VIII. E. S. 



4. T. junceum (L.) ; spikelets 4 — 6-flowered, ffl. obtuse or 

 apiculate 6 — 1 1 -ribbed, lower pale blunt, axis smooth or slightly 

 downy, rachis smooth brittle, I. invohite finely and closely downy 

 above, root creeping. — E. B. 814. P. 63. — Spikelets distant. 

 Rachis easily separating at the knots. Producing decumbent 

 barren leafy shoots. — Sandy sea-shores. P. VII. VIII. 



[T. cristatum (Schreb.); spikelets 4 — 5-flowered closely im- 

 bricated, gl. with a terminal awn, outer pale with an awn about 

 as long as itself, rachis and axis slightly downy, 1. hairy above, 

 St. rough. — E.B. 2267. — " On steep banks and rocks by the sea- 

 side between Arbroath and Montrose." 3Ir. G. Don. P. VII.] S. 



47. Elymxis Linn. 



1. E. arenarins (L.); spike upright close, rachisflat notwinged, 

 gl. lanceolate downy not longer than the spikelets. — E.B. 16/2. 

 P. 64. — Closely resembling Psamma arenaria, but readily di- 

 stinguished by its broad 1. and short Hgule. St. 3 — 4 feet high. 

 — Sandy sea-shores. P. VII. 



2. E. geniculatus [Cvitt.); spike lax, rachis winged, gl. awl- 

 shaped glabrous longer than the spikelet. — E. B. 1586. P. 131. 

 — St. 3—4 feet high. Spike 1 — 2 feet long, usually remark- 

 ably bent downwards at the second or third spikelet. — In a salt 

 marsh near Gravesend. Mr. Dickson. P. VII. E. 



48. HoRDEUM Linn. Barley. 



1. H. sylvaticum (Huds.) ; gl. all awlshaped not ciliate 

 rough, lateral fl. perfect, middle fl. often barren, lower pale with 

 an awn of twice its length. — P. 130. Elymus europceus Linn., 

 Sm., E. B. 1317. — Middle fl., if barren, with shorter gl. having 

 involute edges, thus appearing setaceous. The spikelets have a 

 second fl. occasionally. — Woods and thickets on a calcareous 

 soil. P. VII. VIII. E. 



2. H. pratense (Huds.) ; gl. all setaceous not ciliate rough, 

 lateral fl. imperfect, lower pale of fertile middle fl. with an a^vn 

 of about its length.— i!. B. 409. P. 11.— Spike erect. Gl. of 

 lateral fl. shorter. — Damp meadows. P. VII. 



3. H. murinum (L.); gl. of the middle spikelet linear-lanceo- 

 late ciliate, of the lateral ones setaceous rough, lateral fl. imper- 

 fect.— -E. B. 1971. P. 10.— Spike often slightly nodding. Awn 

 longer than the' lower pale. Lateral gl. sometimes slightly 



