2^0 GltAMINE.E. Caliunuijiu6tis. 



the Dci/curia section of tlic ;,'<Mnis, 1. c.) lAcvs to tliis hiiffius. Tlie panicle is liglit brown or 

 ilarkcT purplisli-lirown, sonletinu^s jmrplish. In botli ca^cs tlie awn exceeds tlie palet by nearly 

 a line and Is attached about one-third imlow the tip. 



H. C. deschampsioides, Trin. Culms tut'led, erect IVom a (leciiinbeut Lase, 

 wliich is thickly cDVercil by withereil remains of sheaths, 5 to 10 indies high, smooth, 

 halt' eiiiialleil liy the basal leaves : culm leaves 1 to 2 inches lont,', loosely convolute, 

 smooth, the uppermost erect, smaller ; ligule about a line long, split ; sheatlis as long 

 as the internoiles, smooth: panicle ovate, 1 to 1^ inches long, open, lew-tloweretl ; 

 rays in pairs or ternate, ilivided above the middle and bearing about 5 llowers, and 

 with the rhachis smooth : si)ikelets 2 lines long, more or less piu'ple-tinged : glumes 

 etjual, broadly lanceolate, acute, as long as or barely ecpialling the lloret : lower palet 

 nearly smooth, membranaceous, lacerate-toothed at apex, slightly scabrous on the 

 nerves, bearing at or below the middle a stout somewhat divergent awn which is 

 exserted about one-third the length of the palet ; hairs at l.ase delicate, fairly eoi)ious, 

 one-half to two-thirds its length ; upper palet (piite eijualling and similar in texture 

 to the other, 2-nerved and irregularly 2toothed : ruiliment a brief process, scarcely 

 one-liftb the length of the palet and naked, or somewhat longer with very short 

 liairs. — Trin. .Spec. (Iram. iii; t. 354:; CJriseb. in Ledeb. Flor. JJoss, iv. 427. ('. 

 rubesceiis, IJuckl. in Proc. IMiil. Acad. 18()2, 02 (!) ; (Jray, in same, 33-1. 



Alaska and Arctic Asia, but not certainly foiunl within our territory. The plant called C. rii- 

 besccHS by I5uckley is doubti'uUy referred here iiy (iray, of which only an imperfect fragment is 

 found in tlie herbarium of the Philadelphia Academy, said to iiave been collected in Oregon liy 

 Nuttall. It is a spi'cies likely to occur, and fnun its close re.send'lance in habit to C. Jlirircri 

 migiit readily Ik- confounded with that sjiecies. In our norliiern specimens the rudiment is no 

 more than barhellate, but Trinius's ligure gives it as distinctly though not copiously plumose. 



4. C. Bolanderi. More or less sca])rous throughout : cidm 2 to 3 feet liigli, 

 geniculate : leaves Hat, 6 to 10 inches long, 2 to 4 lines wide, the uppermost a half 

 smaller, pale yellowish-green : ligule about 2 lines long, truncate, erose or lacerate ; 

 sheaths scarcely half as long as the internodes, rather loose : panicle 3 to 8 inches 

 long, loose, blackish purple, becoming browni.sh ; rays in threes and lives, very slen- 

 der, rather erect, at length spreading or even dellcxed, the l)ranches few-li(jwcred 

 above the middle : spikelets 1^ lines long on longer pedicels : glumes e(|ual, lanceo- 

 late, acutisli, miinitely hairy, rough on the keel, the margins above minutely ciliate : 

 floret barely shorter ; lower palet minutely rough-tuberculate, often bilid, the lateral 

 nerves slightly ex(;urrent ; hairs at base few and unetpial, short, mostly at the sides ; 

 awn attached nearly at base, the lower half twisted and lodged in a dorsal groove, 

 divergent above and exserted just below the tips of the glumes ; upper ])alet slightly 

 sliorter, of .similar texture, broad, 2-nerved, 2-t()otbed, and somewhat rougli-tubt;rcu- 

 late between the nerves : rudiment half the lengtli of the lluret, with long hairs. — 

 0. varia (]), I>oland. Cat. 3-1, 



Swamps, Mendocino County, Bolnnder, n. 0471 (in j.art). A strikingly handsome siiecies ; the 

 yellowish-green color of the jilant contrasted w ith the lilackish-purple of the jiaiiiele must make it 

 conspicuous, while a closer inspection .shows the bright whiteness of the lloret in strong contrast 

 with the deep color of the glumes. The roughness of the jialets is unlike anything we remember 

 to have seen in grasse.s, appearing under the micioscope like minute glistening grains of silex. In 

 the specimens the groove running lengthwise of the lower ]ialet and h)rming a lodgment for the 

 awn is very distinct ami well-defined ; whether it remains in fruit is uncci tain. 



5. C. Breweri, Thurber. Culms densely tufted, 6 to 15 inches higb, erect, 

 very slender, bearing 2 short distant leaves : radical leaves 2 or 3 inches long, 

 setaceously involute, minutely scabrous above ; up))er ligule acute, decurrent, 2 lines 

 long, the lower lacerate ; sheaths closi;, strongly striate : panicle loose, 1 to 3 inches 

 long; rays solitary or clustered, divaricate or more or less erect, barely ecpialling the 

 interspaces, 1 - 3-tlowered : spikelets blackish-purphi, \\ or 2 lines long, smooth or 

 slightly rouglitMied above: lower palet nearly equalling the acute glumes, ndnuttdy 

 4-toothed, slightly roughened, more or l(;ss lined witii purple, and witii a .small tuft 

 of minute unecpial hairs at each side ; awn from above the base, exserted about a 



