582 Bicknell : Studies in Sisyrinchium 



Arizona, occurring perhaps exclusively at high elevations on the 

 mountains, and ascending to at least 7,500 ft.; flowering from early- 

 July to after the middle of August 



Arizona : Rincon Mts., 7, 500 alt 1891, G. C. Neally, no, 153 ; 

 type, U. S. Nat. Mus.; San Francisco Mtn., August 18, 1889, J. 

 H. Knowlton, no. 32; Harts Little Spring, July 8, 1892, J. W. 

 Tourney, no. 430c; E. O. Wooton, July 15, 1892 ; Flagstaff, July, 

 1 89 1, Dr. D. T. MacDougal, July 2, 1892, J. W. Tourney, no. 

 4203 ; Mormon Lake, July 17, 1892, J. W. Tourney, no. 4300; 

 Bill William's Mtn., alt. 7,000 ft, July 22, 1898, Dr. D. T. Mac- 

 Dougal, no. 321. 



This is mostly a taller and stouter plant than S. demissum, the 

 broader leaves and stem less discolored in drying, and with much 

 larger flowers on more exserted pedicels, larger seeds and more 

 slender roots. The flowering period is about one month later. 



Some specimens bear a close resemblance to specimens of S. 

 ensigeriwi. The two plants are, however, perfectly distinct, the 

 present species differing among other characters in more narrowly 

 margined stem, longer peduncles, decidedly longer stamineal col- 

 umn, and larger capsules, the valves showing no traces of lateral 



nerves. 



13. Sisyrinchium demissum Greene 



Growing in narrow erect tufts 1 5-30 cm. or more high, vary- 

 ing from very pale and glaucous to merely glaucescent, pale 

 yellow or brownish green when dry ; roots simple, becoming 

 elongated and somewhat thickened, leaves about half the height 

 of the tufts, sometimes longer, narrow, 1-2.5 mm - wide, mostly 

 attenuate, the acute tip becoming cartilaginous, strongly close 

 nerved or striate, the edges smooth or, toward the tip, cartilagi- 

 nous-ciliolate : stems slender, often twisted and flexuously curved, 

 narrowly margined, the edges smooth to denticulate or, near the 

 node, cartilaginous-ciliolate ; nodes often swollen, mostly only one, 

 when two the lowest one remote and bearing an erect leaf and 

 peduncle ; terminal peduncles usually two, very slender, subequal 

 or very unequal, erectly diverging, mostly 4-9 cm. long, usually 

 much surpassing the bracteal leaf; spathes narrow, the bracts 

 stiff and closely striate-nerved, attenuate and often slenderly acute, 

 frequently ciliolate above, subequal, or either one the longer, 

 13-25 mm. long; outer bract closely united-clasping for 3-9 

 mm., the lower edges rather broadly firm-hyaline ; interior scales 

 silvery white, from half to three-quarters the length of the bracts ; 



