14 



9. SITANTQN GLABRUM J. G. Smith, sp. nov. 



Culms oreot, terete, smooth and shiuing, glaucous. Sheaths glaucous, glabrous, 

 rather closely eiivclojiing and shorter than the interuodes, scarlous aloug the 

 margins, open at the throat. Lignle nienibranaceons, almost obsolete. Blades 

 7 to 15 cm. long, 2 to 5 mm. wide, broadly linear, acute, flat becoming involute, 

 smooth and glabrous on the back, scabrous-pubescent along the nerves above. 

 Spike 5 to 8 cm. long, slender, subtlexuous. its base inclosed in the swollen 

 uppermost sheath. Empty glumes bifid from the very base, the lobes subulate, 

 setaceous, G to 8 cm. long, subflexuous, slender, divaricate. Flowering glume 7 

 to 8 nmi. long, rounded on the back, smooth and shining for its lower two-thirds, 

 linear-lanceolate, acute, entire or minutely bifid at the apex, tipped with a 

 slender, rigid, setaceous awn 4 to 5 cm. long. Palea as long as the flowering 

 glume, bidentate, scabrous on the nerves above. Interuodes of the rachis 

 obcuneate, compressed, about 3 mm. long. 



Type collected by Coville and Funston, No. 914, near Crystal Spring, C'oso Mountains, 

 Calitbruia, June 12, 1891. Also collected by J. A. Allen, California, without date 

 or locality. Xo. 821, Hall, San .Jacinto Mountains, may be i)laced here ; and also 

 I'urpus, No. 5289, Pah Mountains, 1897. The latter has the habit of typical 

 .S. (jlahrum, but the leaves and sheaths are minutely soft pubescent and the spike- 

 lets and empty glumes purplish. Otherspecimens examinedare: L. Schoenefeldt, 

 No. 3ti09, Laguna, Cal., .June 14, 1894 ; and C. V. Piper, No. 1952, dry slopes Mount 

 h'ainier, Wash. 2,100 ni., August. 1895. 



10. SITANION INSULARE J. G, Smith, sp. nov. 



Culms slender, erect, terete, glabrous. Nodes glabrous. Culm leaves 4 or 5. Sheaths 

 glabrous, closely enveloping the culm, open at the throat, shorter than the inter- 

 nodes. Ligule almost obsi>lete. Blades linear, 1 to 1.5 dm. long, glabrous on 

 the back, strongly nerved and strigose-pubescent on the nerves above, scabrous 

 along the margins. Spike slender, 5 to 8 cm. long. Empty glumes lanceolate, 

 bifid and 2-awued, 4 to ."> mm. long, 2 nun. wide, tipped with divergent, slender, 

 scabrous awns, 10 to 20 mm. long. Flowering glume 8 mm. long, linear-lanceo- 

 late, smooth and shining, glabrous for the lower two-thirds, rounded on the 

 back below, keeled above, 3-toothed, the middle nerve extending into a stout, 

 scabrous, divaricate awn about 15 mm. long; lateral teeth 1 to 2 mm. long. 

 I'alea as long as the flowering glume, 2-toothed at the apex. Interuodes of the 

 rachis linear, dilated above, sharply 2-edged, scabrous on the margins, 7 to 10 

 mm. long. 



Type lollected by Sereno Watson, No. 1338, Carrington Island, Salt Lake, Utah, 

 .June, 1869. 



This species is quite distinct from any other in the National Herbarium. It has the 

 broad empty glumes of Klj/iinis, but two-})arted, as in Kiisilatiioii, with divaricate 

 aw lis. Tlie emi>ty glumes are inserted as in Siianio)i. while the form of the 

 spikelets and the habitat of the inflorescence resembles some species of J </ro/ji/ron. 

 As in the other SHanioit species the rachis breaks u]) into segments at maturity. 



11. SITANION CINEREUM .1. G. Smith, sp. nov. 



Slendtr, :iseen<ling, lealV iterennial. 2 to 3 dm. high, the entire plant ashy-gray with 

 a close, dense pubescence. Innovations as long as the culms. Culms slender, 

 terete, jmbescent. Nodes glabrous. Shejiths closely enveloping the iuternodes 

 and shorter than them, densely ciliate-pubescent. Ligule almost obsolete. 

 Blades linear, rigid, involute, the ui)])erniost 5 to 7, the lower 15 to 20 cm. long, 

 densely strigose-pubescent on the nerves above, 8oft-pubes(;ent or hirsute below. 

 S])ike slender, 4 to 5 em. long. ICmpty glumes very scabrous, bifid, 2-awned, 

 the strongly divergent scabrous awns 2 to 3 em. long. Flowering glumes 7 to 8 

 nun. long, roundi'd on tlie back, scabrous throughout, 3-nerved toward the apex, 

 3-awned, the lateral awns very slender, 2 to 4 mm. long, the middle one stout, 



