Ceratochiua.] GRAMINEiE. "253 



2- B, Sitchensis {Bong,); panicula patula (demum patente?) nutante, spiculis 5-T-floris, 

 flosculis ]anceolatis setis terminalibus rectis valvula paullo brevioribus, ligula oblonga 

 producta. Bong. Veget, Sitcha^ p, 5b. 



Hab. Sitcha. Mertens.—" MwrnQ affinis Br. peiidulino, Sesse, (Roem. et Sch. 2. p. G44,) cui et habitu 

 simillimus(nam radii inferiores longi, in speciminibus junioribus nostris patuli tantum, demum fortasse patentes)* 

 differt potissimum setis, flosculorum longioribus, ligula magna rotundata (nee brevi truncata,) ut in Br. pen- 

 duUno, et foliis majoribus." Bongard, 



39. CERATOCHLOA. P. Beauv. 



w 



1. C. brevi-aristata ; panicula elongata laxa subnutante, spiculis lanceolatis ancipiti- 

 compressis glabris (sub lente scabris), glutnis subinaequalibus acutis submuticis nervosis, 

 perianthii valvula exteriore acute carinata.multinervi brevi-aristata, foliis lato-linearibus 

 villosulis, vaginis villo'so-tomentosis. (Tab. CCXXXIV.) 



Hab. Dry elevated ground of Lewis' and Clarke's River, and near the sources of the Columbia. Douglas. 

 — Culm 2-3 feet high, near the base as thick as a swan's quill. Leaves very broadly linear-acuminate, slightly 

 hairy. Ligule ovate, membranaceous, white. Panicle 8-10 inches long, slightly compound, erect, or a little 

 droopingto one side. Spikelets inclined (not drooping), an inch or an inch and a quarter long, lanceolate, 

 remarkably compressed, sharply 2-edged, of a harsh and rigid texture, of a pale uniform green colour, minutely 

 scabrous, more so on the keel. Glumes moderately unequal, lanceolate, acutel}^ carinate, gradually com- 

 ing to a point, not arlstate, shorter than the florets, outer about 5, inner about 9-nervcd, Exterior valve of 

 the perianth complicato-corapressed, sharply carinate, 9-or more nerved, having a very evident, but short, 

 straight awn, from between the slightly bifid points. Inner valve scarcely half so long as the outer, narrow, 

 lanceolate, bifid at the point, the margins sharply inflexed ; at the flexures there is a strong ciliated green nerve. 

 Stamens 3. Filaments, apparently, in the advanced state of the flower, incorporated with the ovary, for I can 

 iu no instance trace them, till they become free at the top of the crest of the germen. Anthers (abortive ?) 

 small, ovate. Ovary and young fruit oblong with a deep furrow in the inner face, crowned with a 3-lobed 

 whitish hairy crest. Allied to Ceraiochloa unioloides, Beauv. (which has been found in Texas by Mr Drura- 

 mond, No. 376» of his 3d Coll.) but very different in the foliage and in the presence of a distinct awn to the 

 florets. 



Tab. CCXXXIV. — Fig. 1. Spikelet ; f. 2. Glumes ; f. 3. Perianth ; /. 4. Outer view of an inner valve 

 of do. ; f, 5. Immature fruit : — magnified. 



2. C, grandiflora; panicula subsimpllci laxa, spiculis valde compressis subancipitibus 

 pubescenti-scabris lO-ll-floris, glumis subsequalibusacuminatis vlxaristatis 9-nerviis car- 

 inatisj perianthii valvula exteriore compresso-carinata 9-nervi arista stricta valvulse dimi- 

 dio longitudinis terminata, foliis lanceolato-linearibus vaginisque hirsutulis. (Tab. 



CCXXXV.) 



Hab. Common on the plains of the Columbia. Dr Scouler. Douglas', — Allied to the last in its compressed 

 florets, but quite distinct. The spikelets are in some of the specimens mucli longer than in any species of the 

 genusi am acquainted with. Although the florets are carinated they are less so than in the preceding species, 

 and more remote on the rachis : the awn, too, is far longer than in that species. The inner valve is gra- 

 dually attenuated into a long acumen, deeply bifid at the point. In the flowering spikelets, the filaments may 

 easily be traced to the base of the ovary; but in a more advanced state, the lower part of the filaments pro* 



