38 



2 dm. or less in length, all 1 to 4 mm. wide, strongly involute and almost filiform 

 (or occasionally nearly flat), erect, more or less flexuous, thickisli, strongly 

 hispidulous-scabrous on the margins and on the upper surface, glabrous beneath. 

 Panicle about 2 dm. long, about 2 cm. wide, oblong-lanceolate, acuminate, erect, 

 flexuous, straw-colored, faintly tinged with purple; rachis slender, sparsely 

 scabrous above, glabrous toward base, its internodes somewhat elongated, the 

 lowest about 4 cm. long; branches slender, appressed, rather densely flowered, 

 scabrous-pubescent, the lower primary branches in G's to 8's, the longest .'i to 6.5 cm. 

 long. Spikclets about 4 mm. long. Empty glumes lanceolate, acuminate, some- 

 what strongly keeled toward apex, thin membranous, hispidulous on the keels, 

 elsewhere strongly scabrous, the first slightly longer. Flowering glume about 



3 mm. long, slightly shorter than the second em])ty glume, ovate, broadly trun- 

 cate, very minutely 4 to 6 dentate, thin membranous with subhy aline edges and 

 tip, scabrous on the back; awn attached about two-fifths above the base, equal- 

 ing or slightly shorter than the glume, straight, rather stout. Palea about 

 three-fourths (rarely four-fiftUs) as long as the flowering glume, oblong-ovate, 

 deeply bifid with obtuse teeth, glabrous. Anthers about 2 mm. long. Callus- 

 hairs copious, soft, bright white, the longer one-half (occasionally three- fifths) 

 as long as the flowering glume. Prolongation of tlic rachilla, Avith its hairs 

 equaling or slightly exceeding the palea. 



Type specimen in the United States National Herbarium, collected iu the Sierra 

 Nevada Mountains, California, by ,1. G. Lemmon (444), 1875. 



Much resembling and nearly related to ('. mexpansa, but differing in its somewhat 

 softer texture ; culms glabrous, with nodes not constricted; ligule shorter (about 

 one-half as long) and thicker; leaf-blades glabrous beneath; spikeJets mostly 

 smaller ; empty glumes nearly equal, less sharply acuminate, thinner and usually 

 less scabrous; flowering glume sometimes 6-dentate; awn longer, attaclicil some- 

 what higher and less scabrous; palea broader, more conspicuously toothed ; and 

 hairs of the callus and of the prolongation of the rachilla mncli shorter. 



X \ Panicles mostly nhort, dense, sjnciform ; jilavin nsiiaUi/ low and slronf/lji ciifi])ifose. 



36. CALAMAGROSTIS LABRADORICA Kearney, sp. n. 



A small rigid plant of hard texture, somewhat glaucous, short-stolon Iferous, with 

 erect rather long innovations, strict culms, erect strongly involute leaf-blades 

 and narrow spike-like panicles. Culms 3.5 to 5 dm. high, ratlicr stout, closely 

 enveloped at bas<; by the rather long marcescent sheaths; internodes 3, the 

 two upper finally much exceeding their sheaths. Sheaths closely embracing the 

 culm, glabrous. Ligule 1.5 to 3 mm. long, somewiiat narrowed to the broad, 

 truncate or rounded apex, firm, glabrous. lUades 5 to 20 cm. long, 2.5 mm. or 

 less wide, stongly involute, filiform toward .apex, erect, thick, scabrous on the 

 margins and nerves above, glabrous beneatli. Panicle 6 to 9 cm. long, 0.5 lo 1 

 cm. wide, linear to oblong-lanceolate, acutish, eiect, strict, strongly interrupted 

 tow.ard ba.se; r.achis stout, straight, glabrous below, somewhat scabrous above, 

 the lower internodes comparatively elongated, the lowest 1 to 2 cm. long; 

 branches short, stout, ai)pre8scd, densely tlowered, not strongly fiexmius, rather 

 sparsely scabrous, the lower i)rinuiry branches mostly in 3's, the longest 1.5 to 2 

 cm. long. Si»ikelets about 4 mm. long. Empty glumes ovate to ovate-lanceolate> 

 .acute, not strongly keeled, sparsely hisjddulons on the keels, otherwise nearly 

 glabrous, firm, thickisli, aluiost chartaccous, dark red-])uri>]e at least on the 

 edges and tip, e(|ual iu length or the first slighlly longer. Flowering glume 

 about 3.5 mm. long, slightly shorter than the second empty glume, broad, ovate- 

 oblong, broadly truncate, usually minutely l-dentate with rounded teeth, firm 

 membranous with thinner edges and tiji, minutely scabrous on the back; awn 

 attached from one-third to one-half above the base, not nearly c(]ualiug the 

 glume, slender (or occasiou.ally rather stout), str.aight, erect, minutely scabrous. 

 I'alea two-thirds to three-fourths as long as the llowering glume, nmch narrower, 



