13 



upper leaf sheaths, closely-flowered. Empty glumes 4, subulate or one of the 

 lateral ones often lanceolate and 2-uerved, bifid from above the middle, scabrous, 

 25 to 32 mm. long. Spikelets 2-liowered, both florets of one of them sterile, 

 reduced to subulate awns. Lower floret of the other hermaphrodite, the flower- 

 ing glume 5 mm. long, lanceolate, strongly nervctl and scabrous above the 

 middle, smooth below, entire, tii»ped by a slender scaltrous, subflexuous awn 

 about 3 cm. long. Palea as long as the flowering glume, bicuspidate. Second 

 floret rudimentary, awned. luternodes of the rachis 2 to 3 mm. long, siiatulate, 

 glabrous. 



Type collected by L. Schoenefeldt, No. 3277, International Boundary Commission, 

 Jacumba Hot Springs, near monument 23.3, altitude 900 m., May 24, 1894. 



Related to Sitanion multisetum. 



7. StTANION RIGIDUM ,J. G. Smith, sp. nov. 



Culms 1 to 2 dm. high, terete, striate. Nodes glabrous. Sheaths longer than the 

 internodes, smooth and glaucous, or the lower ones hirsute, open at the throat. 

 Ligule cartilaginous, 1 ram. long. Blades 3 to 8 cm. long, 2 to 3 mm. wide, rigid, 

 involute, smooth and glaucous on the back, obtuse or acute at the apex, scab- 

 rous along the margins aud nerves above. Spike 2 to 8 cm. long, ascending, 

 exserted its own length, or the base included in the uppermost leaf-sheath; 

 empty glumes 4 and entire, or 6 (/. e., the two lateral ones at each node divided 

 to the very base) awned, strongly divaricate, 2 to 3 cm. long. Lowest floret 

 sometimes sterile, like the empty glumes. Spikelets few-flowered. Flowering 

 glume 7 to 9 mm. long, linear-lanceolate, tritid, smooth and glaucous below, 

 scabrous above, tipped with a stout, divergent awn 3 to 4 mm. long. Internodes 

 of the rachis 3 to 4 mm. long, compressed, scabrous on the margins. 



Type collected by O. D. Allen, No. 178, Cascade Mountains, Washington, 1896. Other 

 specimens examined are Elmer, No. 1145, Washington, 1898; and G. K. Vasey, 

 Washington, 1889; H. E. Brown, No. 372, north side of Mount Shasta, California, 

 1897; R.M.Horner, No. 579, Blue Mountains, Washington, July 29, 1897; A. Nel- 

 son, No. 1021, Union Pass, Wyoming, August 13, 1895; J. N. Rose, No. 271, Timber 

 Reserve, northwest Wyoming, August 28, 1893; Frank Tweedy, No. 79, Teton 

 Forest Reserve, Wyoming, July, 1897; aud S.Watson, No. 1337, E. Humboldt 

 Mountains, Nevada, August, 1868. 



This grass is related to S. glahntm, diftering in the dwarf habit of growth and rigid 

 glaucous leaves. 



8. SITANION CALIFORNICUM J. G. Smith, sp. nov. 



Culms low, ascending, 1.5 to 2.5 dm. high, terete, striate, densely pubescent above, 

 geniculate at the nodes. Sheaths longer than the internodes, the lower ones 

 densely hirsute, the upper minutely puberulent, the uppermost many times 

 longer than the blade. Ligule obsolete. Blade 2 to 8 cm. long, 3 to 4 mm. wide, 

 rigid, divaricate or ascending, prominently striate, linear-lanceolate, abruptly 

 contracted at the base, attenuate toward tlie obtuse or subacute apex, scabrous 

 above and on the margins, densely puberulent on the back. Spike subflexuouS, 

 erect or ascending, loosely few-flowered, 5 to 8 cm. long, barely exserted or the 

 base inclosed in the uppermost leaf-sheaths. Lowest floret of one of each pair 

 of spikelets sterile. Empty glumes 4, entire, subulate-setaceous, divaricate, 3 

 to 5 cm. long. Flowering glume linear, acute, abruptly rounded at the base, 10 

 to 12 mm. long, finely scabrous, terminating in a stout, divaricate, scabrous 

 awn about 4 cm. long, arising from between two minute lateral seta-. Palea 2 

 mm. shorter than the flowering glume, truncate or obtuse, scabrous on the 

 nerves above. luternodes of the rachis compressed, 4 to 5 mm. long, scabrous 

 throughout. 



Type collected by S. B. Parish, No. 3295, San Bernardino Mountains, California, alti- 

 tude 2,1.50 m., June 23, 1894. Closely related to S. rUfidum, but with leaves 

 pubescent throughout and longer flowering glumes. 



