266 BOTANY. 



be especially a rendezvous of our more northern forms of Orchids. It is not 

 unlikely that the summits of the White Mountains of Arizona still further 

 north woidd show even a greater number. 



IRIDE2E. 



Iris Tolmieana, Herb. Bot. Beechey. — South Park, Colorado, com- 

 mon (967). Dr. Loew also collected an imperfect specimen from further 

 south, probably New Mexico. 



Sisyrinchium mucronatum, Michx. (S. Bermudiana, L., of Preliminary 

 Report, 1874). — Regarded by Mr. Watson as distinguished from 8. Bermu- 

 diana, L, "by its low and usually very slender habit, the scape always 

 terminated by a single spathe sessile within the terminal longer bract, and 

 the flowers small, with segments setosely mucronate and capsides globose" 

 (Proc. Amer. Acad, xii, p. 277). My specimen (945) from Colorado has 

 larger flowers, and is probably somewhat out of range ; still I regard it as 

 belonging to this form. 



Sisyrinchium bellum Watson (Proc. Amer. Acad. I. a). — 6-18' high; 

 leaves narrow, smooth, shorter than the smooth stems ; terminal bracts 

 1-3' long, not longer than the peduncle ; spathes 2, enclosing 4-7 flowers 

 and maturing 2-4 capsules, which are somewhat obovate and transyersely 

 wrinkled when mature ; seeds obtusely angled and distinctly roughened, 

 about 10 to the cell, light purple ; petals 4-6" long, toothed or slightly 

 mucronate ; stamineal column nearly 3" long and pubescent at the base. 

 The stem is narrowly margined. — Zuni, New Mexico, 6,500 feet eleva- 

 tion (171). 



Sisyrinchium Arizonicum, Rothrock, Bot, Gazette, vol. 2, p. 125. — 1-2 

 feet high; stem proper smooth, ancipital; leaves 6-12 inches long, 2-6 

 lines wide, gradually attenuate into an acute point, 2—4 distinct white ribs 

 in centre, and one or more less distinct toward either margin, minutely 

 pruinose- glandular, slightly roughened on the margin ; spathe of two 

 lanceolate leaves regularly tapering to the top, somewhat shorter than the 

 peduncles, of which each branch bears from 2-5 (most frequently 2); flowers 

 yellow, 1-1 J' in diameter, bright yellow segments of the perianth broadly 

 lanceolate ; anthers 6 lines long, linear, twice as long as the dilated fila- 



