BARNES — NORTH AMERICAN MOSSES. 187 



In the Revision of N. A. species of Fissidens,i FF. inconstans, cxigwis 

 and minutulus were reduced to F. incurvus, the latter two forming va- 

 rieties. FF. hryoides ccespitans, crassipes, HaUii and Texanus are 

 relegated to the list of doubtful species. FF. Bambergeri Schimp. I 

 regard as a form of F. incurvus; F. viridulus is a form, possibly a sub- 

 species, of the same. It may be known by its thin-walled capsule, with 

 the peristome inserted below the mouth. Neither are worthy of a distinct 

 place in the key. "i^. tamarindifollus Don" (Mac. Cat. 36), seems to 

 be F. tamarindifoUus Brid. which is a variety of F. incurvus. 



LEUC0BRYUM,2 p. 90. 



Capsule apparently lateral (by innovations), leaves ovate lanceolate. 



Robust, tufts 4-6 cm. deep . . . L. glaucnm (L.) Sch.,^ 90. 



Smaller tufts scarcely 2 cm. deep . L. glancum albidura,* 91. 



Capsule exactly terminal, leaves squarrose, very short 



and very broad L. minus, '^ 91. 



CERATODON, p. 92. 



Costa percurrent or vanishing below apex. 

 Capsule distinctly strumose, articulations of teeth 



few C. heterophyllus, 101. 



Capsule not distinctly strumose, articulations of 



teeth many C purpareus, 92. 



Costa long excurrent, teeth articulate to the middle. 



Leaf margin entire C. conicns, 100. 



Leaf margin serrulate toward apex . . . . C. minor, 92. 



TRICHODON, p. 92. 



Cells of the leaf base linear, above rectangular or in- 

 distinct T. cylindricus, 93. 



Cells of leaf base rectangular (1 : 2-4), above quadrate T. flexifolius, 102. 



DISTICHIUM, p. 93. 

 Costa long excurrent. 



Capsule erect, spores 17-20// . . . . D. capiilaceum, 93. 



Capsule cernuous, spores 30-44/i . . . D. inclinatum, 94. 



Costa percurrent or vanishing below the apex . D. Macounii, 106. 



1 See Barnes : Bot. Gaz. 12: 1. 1889. 



2 See E. G. Britton, BuU. Torr. Bot. Club 19: 189. 1892. 

 8 L. vulgare L. & J. Man. 90. 



■* L. albidum (Brid.) Lindb. L. minus Sulliv. non Hampe. 

 6 L. sediforme L, & J . Man. 91. 



