﻿222 Grout : A Revision of the 



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CIRRIPHYLLUM gen. nov. 



Gametophyte very robust, glossy, growing on earth and rocks, 

 occasionally on roots of trees ; stems possessing a well differentiated 

 central strand, prostrate or creeping, irregularly or subpinnately 

 branching, branches julaceous, terete-foliate. Leaves imbricate, 

 very concave, spoon-shaped, rounded and often cucullate at apex, 

 abruptly drawn out into a long filiform acuminatum, costate to 

 the middle or beyond; median leaf-cells linear, 10-15 : 1 ; basal 

 broader and shorter ; alar often quadrate. Sporophyie as in Brachy- 

 thecium except that the operculum is usually long-rostrate. 



The plants referred to this genus certainly have no closer 

 genetic relationship with those retained to represent Eurhynchunn 

 than with several other genera. The rostrate operculum is the 

 only character which would link the two in one genus. Lindberg 

 transferred the European representatives of this genus to the divi- 

 sion Rliynchostegium of the genus Hypniun, while Kindberg places 

 them all in Brachythccium. The gametophyte characters of sev- 

 eral species are certainly more like Brachythecium than Enrliyn- 

 chiuvi. The resemblance between C. Tommastmi and Brachythe- 

 cium albicans is certainly very striking, and robust forms of the 

 latter have been taken for the former. Consequently it seems 

 far more satisfactory to constitute the following species a sepa- 

 rate genus, far better characterized than many of the allied genera, 

 also more distinct and more homogeneous. Some of the species 



here referred to Cirriphylluin have been referred to Mynruim, but 

 the fact that the leaves of the species upon which the genus was 

 founded, M. hebridariiun Schimp, are ecostate seems to be sufficient 

 proof that it is not congeneric with any of the following species. 



Leaves with a very long filiform acuminatum. 



Apex of branch leaves strongly cucullate at base of the acumination. 



High alpine mosses growing on stones ; costa of stem leaves very short. 



1. C. cirrosiitn. 



Lowland mosses growing on the ground and roots of trees ; costa of stem 

 leaves extending % their length. 3. C. piliferutn. 



Apex of branch leaves not cucullate at base of acumination. 



Acumination 0.3-0.4 mm. long; median leaf-cells 3-4: I. 



2. C. Brandegei. 

 Acumination 0.5-0.8 mm. long ; median leaf-cells 8-12 : I 



ia. C. cirrosum Colorado**** 



Leaves shorter acuminate, apex twisted. 4. C. Boscii. 



