290 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



194. Rhacomitrium alternatum C. M. & Kindb.— Allied to R. Ma- 

 counii: stem lower, more branched above: tufts loose, not naked at base, 

 brown with green tips: leaves not crisped, when moist sub-erect or sub- 

 patent, nearly straight, ovate lanceolate, acuminate-acute, often furnished 

 with a short dentate hair point, smooth, reflesed at the base at least on 

 one side; all cells erose, lower linear, upper short angular; costa greenish, 

 stout, percurrent: perigonial leaves sub-ovate or short acuminate, acute or 

 sub-obtuse: female plants not found. Mac. Cat. 73.— On boulders : Sel- 

 kirk Mountains, B. C. 



195. Rhaconiitrinm robustifolium Kindb,— Differs from R. Ma- 

 counii in leaves less crispate, pellucid, very squarrose when moist, more 

 reflexed on borders, often furnished with a short hair point: capsule oval, 

 striate or plicate when dry; teeth dark purple brown, deeper cleft, papillose; 

 beak oblique, needle shaped, very much shorter than capsule; pedicel 

 slightly curved. Mac. Cat. 73.— On rocks : Lake Griffin, B. C; Vancouver 

 Island. 



196. Rliacomitrinin obtusum (Lindb.) R. & C— Dioicous : short, 

 densely pulvinate: leaves quite hairless, ovate oblong, gradually acuminate, 

 obtuse at point, nerve lost far below apex, margin narrowly revolute: cap- 

 sule oblong, narrowed at mouth; lid acicular; peristome fugacious, irreg- 

 ular, teeth with two unequal legs. Mac. Cat. 74.— On rocks: Lake 

 Superior. 



197. Rhacomitrium heterosticlium alopecurum Hiib.— Dioicous: yel- 

 lowish green, scarcely hoary: stem slender, elongate, fasciculate branched: 

 leaves lanceolate acuminate, acute with a short or obsolete hair point: cap- 

 sule elliptic-oblong, narrow at mouth; lid conic rostrate; teeth short, pale, 

 cleft to base. Mac. Cat. 74.--On dry rocks: Halifax, N. S.; Selkirk 

 Mountains and McLeod's Lake, B. C. 



198. Rhacomitrium heterostichum occidentale R. & C— Stems often 

 nearly simple: pedicel very short; capsule small, pale, not shining; peri- 

 stome pale. Bot. Gaz. 15: 41. 1890.— On rocks: Lost Lake, Oregon. 



199. Rhacomitrium micropus Kindb.— Habit of R. heterostichum or 

 R. caneseens: plants dirty green, branches nodose with numerous short 

 branchlets: leaves very faintly papillose, ovate-lanceolate, long-acummate, 

 more or less revolute, hair point long and rough; cells yellow, upper short 

 or elongate, alar distinctly quadrate: capsule small, oblong-cylindric; beak 

 short, oblique; pedicel short. Mac. Cat. 77.— On rocks: Gold Range, 

 B. C; Hector, N. W. T. 



200. Rhacomitrium microcarpum Talmeri Kindb.— Leaves long 

 subulate, hairless, upper cells longer and more confluent, alar large and 

 rectangular: capsule shorter pedicellate. Differs from related R. Sudeti- 

 cuni in deeply cleft peristome teeth and narrow leaf cells. Mac. Cat. 

 267.— St. Paul Island, Behring Sea. 



