. A revision of the North American Isotheciaceae and Brachythecia [microform]. Mosses; Mousses. I'K'. 178 Bor. Am. (Ed. i) 331, (Ed. 2) 494 and 495 ; Austin, Muse. Appal. 318 ; Ren. & Card. Muse, Am. Sept. Exsie. 243. Quite variable in size and shape of leaves and in gross appcar- anee. Maeoun's Can. Muse. 591 on whieh B. leucoglaucum C. Muell & Kindb. was founded has the seta very rough and cannot be distinguished from this speeies. loa. Brachythecium rutabulum flavescens (Brid.) Br. and Sch. Bryol. Eur. fasc. 52-54. //. j^^. Hypnum flavescens Brid. Spee. Muse. h. f 185. 1812. Brachyt
. A revision of the North American Isotheciaceae and Brachythecia [microform]. Mosses; Mousses. I'K'. 178 Bor. Am. (Ed. i) 331, (Ed. 2) 494 and 495 ; Austin, Muse. Appal. 318 ; Ren. & Card. Muse, Am. Sept. Exsie. 243. Quite variable in size and shape of leaves and in gross appcar- anee. Maeoun's Can. Muse. 591 on whieh B. leucoglaucum C. Muell & Kindb. was founded has the seta very rough and cannot be distinguished from this speeies. loa. Brachythecium rutabulum flavescens (Brid.) Br. and Sch. Bryol. Eur. fasc. 52-54. //. j^^. Hypnum flavescens Brid. Spee. Muse. h. f 185. 1812. Brachythecium platycladum C. Muell. & Kindb. Maeoun, Cat. Can. PI. 6: 195. 1892. Can. Muse. 287, in part. Plants straw-eolored, very stout; stem and branches loosely foliate, turgid ; stem leaves very broadly ovate, eoneave, abruptly short-aeuminate. With the typical form. Montana (R. S. Will- iams) ; Jamaica Plains, Mass. (E. Faxon). At first sight this form seems distinct from B. rutabulum but there is a complete gradation of forms from the typical plant to the variety. The stem leaves often resemble those of B. rivularc but they are longer acuminate and some of the branch leaves arc not much different from those of typical B. rutabulum. This variety seems imperfectly dioicous, as both Kindberg and R. S. Williams describe it as dioicous. The Columbia specimen of Maeoun's 287 (which is undoubtedly the same as that described by Kindberg) contained plants whieh bore both male and female branches. II. Brachythecium ASPERRiMUM Mitt. Journ. Linn. Soe. 8: 33. 1865. Hypmim valliiim Sull. & Lesq. Muse. Bor. Am. Ed, 2, 506. 1865. Brachythecium Villardi'.L. &C. Bot. Centralbl. 44: 442. 1890. ., , Brachythecium gemmascens C. Muell. & Kindb. Maeoun, Cat. Can. PI. 195. 1892. Brachythecium spurio-rutabulum C M. & Kindb. 1. e. 197. Brachythecium Columbico-rutabulum Kindb. 1. e. 198. - Brachythecium subititricatum YAndh.^&v. ^ryoX. 22'â 86. 1895. Gametophyte in wide loose ma
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