TRIANDRIA— DIGYNIA. Triticum. 185 



On steep banks, and rocks, ])y the sea side, between Arbroath and 

 Montrose. Mr. G. Don. 



Perennial. July, but rarebj. 



Root of several long, strong-, very woolly fibres, suited to a sandy 

 soil. Stems ascendini?, 12 or IS inches high, simple, wavy, slen- 

 der, rigid, leafy ; hairy at the top. Leaves linear, keeled, taper- 

 pointed, folded rather than involute, many-ribbed ; smooth be- 

 neath ; very hairy on the upper side. Sheaths close, striated, 

 smooth. St'lpula scarcely any. Spike terminal, erect, an inch or 

 more in length, ptde, bl'untish, compressed, of numerous small 

 oblong spilc'elcts, so closely crowded as to depress each other. 

 Florets variable in number from 3 to 6 or 7, either smooth or 

 hairy. Cali/x-valves elli})tic-oblong, with a terminal, straight, 

 rough awn, us long as themselves ; their lateral ribs obsolete, 

 or smoothed av/ay, not turgid as in 7'. prostratum, a species next 

 akin to this, but with a shorter, rounder, spike, annual root, and 

 branched stem. The outer valve of the corolla resembles the 

 calyx, but is longer j inner notched at the summit, its margins 

 infl'exed, as usual, at the lateral ribs. 



Gmelin remarks that the hairiness of the leaves is variable. The 

 spikelets, in one of the Linnsean specimens, are extremely hairy; 

 in another, like Mr. Don's, smooth. In one Siberian specimen 

 they are viviparous, apparently after the manner of alpine grasses; 

 the'transformed glumes singularly enhu-ged, and strongly ribbed. 



T. imhrieatum of Marschall von Bierberstein, Fl. Taurico-Cauca- 

 sica, r. 1.8S, sent from the Gottingcn garden by Professor 

 Schrader, seems to differ from the crislatnm in the much greater 

 dimensions of its herbage only, the spike being very like that of 

 our wild specimen, and but little larger. T. pectinatum of the 

 same author is but the smooth state of cristatum ; and I am well 

 satisfied that pubescence is here of no importance, 



5. T. loliaceum. D'vvarf Sea Wheat-grass. 



Calyx-valves obtuse, awnlcss. Florets numerous, avvnless, 

 elli})tical, ribbed. Si)ike unilateral. Stem branched. 

 Root fibrous. 



T. loliaceum. Fl. Br. 1.59. Engl. Bot. v. 4. t. 221. Willd.Sp.Pl. 



t'. 1.483. With.\7\. Knappt.WA. Hook. Scot. Ao. SchracL 



Germ. v. 1. 39.5. 

 T. unilaterale. Ait. flort. Kew. eel. 1 . r. 1 . 1 22. Host Gram. v. 2. 21 . 



t. 27 ; but not of Linnaeus. 

 Poa loliacea. Huds. 43. Relh.'S?. 

 Gramen pumilum, 4oliaceo simile. Rail Syn. 395. 

 G. exile duriusculum maritimum, foliolis circumvolutis, veluti jun- 



ceis, brevibus. Pluk. Phyt. t. 32. f. 7. 

 G. loliaceum maritimum biunciale. Moris, v. 3. \ 82. sect.S. t. 2. /. 6. 

 G. loliaceum e\ile durius. Rel. Rudb. 13./. 



