Xo. 42. 

 CALAMAGROSTIS HOWELLTI Vasc.v. I'-.t. C.uz. vi. L'71. 



I'laiit ])ci('iiiiial, (Iciiscly tnt'tcd, with Mlmiidaiil. rather coarse roots. 



Ciibiix erect or somewhat geiiiciihitc below, simple, smooth, 10 to L'O inches hijili. 



Lcares of sterile shoots numerous, with close, smooth sheaths and slender, invo- 

 lute Idades nearly e(|nalin.i; or even exeeediiij; tlie culms. Leaves of the culm '2 or .'i; 

 sheaths close, striate, smooth, e(|ualin{;' the inteinodes; blades asceudinj;. Hat or 

 involute, attenuate-point(>d, firm, noi ri,i;id, slightly hispid above, 5 to 8 inches Iniig, l 

 line wide: ligule scarious, often jnirpie. neaily acute, LM lines jonn'. 



I iijUii (secure :n\ oblong or pyiamidal jtanicle 2 lo Tt inches long, spieading at flower- 

 ing- time and moreen- less contracted afterward; rays mostly in fives, slender, scabnms, 

 li inches long or less, subdivided, and bearing 5 to 10 s])ikelets beyond the middle. 



iSjjikrIel.s on ])e(li<'els nearly e(iualing or often exceeiling themselves, turgid, acute, 

 2J to 3 lines long; enii»ty glumes lanceolate, aciun i na t e, convex, carinate abovc^, .smooth ; 

 first glume 1-ncrved, 2.J to •'? lines long; second glume distinctly ."> nerved, slightly 

 shorter; tloral gluiiu' lance-ovate, thin, nearly smooth, 2i to '■> lines lung, cleft at the 

 apex, each lobe terminating iu two slender teeth fonned by the (^xcurrcnt nerves awn 

 attached about J from the base, bent, .i inch long; hairs of the callus half as long as 

 the glume; hairs ami awn of the rudiment eciualing the glume; ])alet oblong, the two 

 iu;rves excurrent at the obtuse apex, thin, smooth, 2 lines long; grain narrowly oblong, 

 slightly tiattened, 1 line long. 



Pl^ATK XLII; a, emjity glniui's; /*, rudiment aiul tloret with glnnu- and iialet 

 spread a]iart, showing the grain; c. )ialet. 



Oregon. A iuindsonu', s])ecies easily distinguished liy the long setaceous lea\es. the 

 prominent awns, and tM slender teeth of both glumes and ])alets. It produces abun 

 <laiit foliage, and should be tried in cultivation as a ]>asture i>v meadow grass. 



