292 GRAMINE.E. Cijiiudun. 



or a pedicelled imperfect floret, awnless, sessile in 2 rows. Glumes keeled, point- 

 less, somewhat uuecpial, spreading, shorter than the lloret. I'alets pointless, awn- 

 less, the lower larger, boat-shaped, prominently keeled, tlie upper 2-nervetl, concealing 

 the rudiment in its fold. Stamens 3. Styles 2, rather long with featlu.'ry stigmas. 



A genus of whiuh about a ilozeu sjn'cics are dcscribcil, but luobt of thcui are supimsi-d to be 

 forms of the witkly (HssLiuiiiated ijcreuuiul one here given. 



1. C. Dactylon, Pers. Culms prostrate, stout, often creeping several feet, 

 clothed with undeveloped sheaths, ;ind throwing out prostrate brandies, as well as 

 ascending geniculate tlowering ones G to 10 inches high : leaves about an inch long 

 and a line wide, with a rather obtuse scabrous apex, still and sometimes involute, glau- 

 cous ; ligule short with very long hairs ; sheaths much crowded, loose, strongly 

 striate : spikes 3 to G, an inch or two long, the rhachis concavo-convex : spikelets 

 rarely over a line long, imbricately appressed : glumes ovate, usually spreading and 

 rough on the keel ; lower palet broadly boat-shaped, smooth, the keel and margins 

 ciliate ; upper palet narrow ; rudiment half as long as the lloret, sometimes minute. 

 — lieicheub. Icon. Flor. Germ. t. 2G ; Nees, Gen. 1, t. 39. 



Near San BernunHno (Parry k Lenihion) ; San Jose, M. Jackson Lewis. Tliis is the "Doub" 

 of the East Indies, tlie " Dog's-tooth Grass" of Europe, but in tliis country always called " Ber- 

 muda Grass." It is very connuon in all warm countries, inuludiui^ .Australia ; in the Eastern 

 States it is thoroughly Ilaturali^ed, being found as far north as Pennsylvania, and far more 

 abundantly south and southwestward, varying greatly in size according to the character of the 

 .soil ; the sjiikes arc .vtmetimcs imrplisli. This and llic. ('rab-gra:.s, I'anicuin saiKjuiiaiU; arc pomi- 

 larly often confused ; that has its spikelets inserted on the rluichis by pairs, one sessile, the other 

 pedicelled, while in this they are all sessile and solitary. Though a troublesome weed in the cot- 

 ton fields, it is by many regarded as the most valualile of pasture grasses for the Southern States, 

 and of great value even for hay. It is a singular fact that it has never been known in the Eastern 

 States to perfect its seed, and it can only be propagateil by cuttings. 



30. LEPTOCHLOA, Bcauv. Si.iiNunR Gii.vss. 



Panicle simple, its liranches being long slender spikes, upon one side of which the 

 spikelets are sessile in two rows. Spikelets 3-several-llowered, the uppermost 

 imperfect. Glumes membranaceous, the upper larger, keeled and often subulate- 

 pointed. Lower palet 3-nerved, ciliate or hairy, entire or 2-toothed, awnless or 

 bristle-awned from between the teeth. Upper palet smaller, prominently 2-nerved. 

 Stamens 2 or 3. Ovary stipitate : styles simply i)lumose. Seed, in some species, 

 loose in the pericarp. 



A small genus, as to the limits of which botanists differ ; spe(-ies with the lower palet bristle- 

 awned between tlie teeth are by some referied to Diplachnc, Beauv. 



1. L. fascicularis. Gray. Annual, cidms \ to 2 feet high, decumbent, genicu- 

 late, branching : leaves tlat, 4 to G inches long, smooth or roughish, the u])per mostly 

 equalling the panicle ; ligide a line long, lacerate ; sheaths loose : panicle 4 to 8 

 inches long, its base usually included; spikes strict, 3 to 4 inches long; si)ikelets 

 solitary or in twos or threes, short-pedicelled, 3 to 5 lines long, 5 - 11-llowered, the 

 joints minutely hairy-tufted : glumes lancecdate, acute, rough on the strong single 

 nerve, often mucronate, the lower at least a half shorter than the lower lloret, the 

 ui)per as much longer; hiwor palet ovate-lanceolate, ciliate biilow tin; midiUe, hintrt- 

 awned at the cleft ape.\, with two minute lateral teeth ; upper slightly shorter, shoit- 

 pointed, silky-ciliate : styles very long : ])ericar|) membranous. — Man. (123, t. 'J ; 

 Durand & Ililg. in Pacif. R. Picp. v. 15. Festuca pohistachya, Michx. ; Kll. Sketch, 

 i. 1G9, t. 10, lig. 3. Diplachne fascicularis, Beauv. Agrost. 80, t. IG, fig. 9. Ura- 

 lepis [Tricuspis) composita, Buckl. in Proc. Acad. Philad. (18G3), 94. 



Pose Creek {llccrinann) ; Fort Yuma {Major Thomas) ; Colorado Itivcr, Keubrrry. This does 

 not ajipear in any of the collections made by the State S\irvey, yet must be more freijucnt than this 



