— 153 — 



Fam. 15. SchJstostegacegB. 



66. Scliistostega Mohr. 

 l.S.OSinundacea Dickson. — Mnium Dicks., Schistostega Mohr. 

 Lobes of tlie frons (»leavesi>) suboblong short-acuminate acute 

 entire; cells large, Capsule minute globose; pedicel elongate. 

 Stem naked below, often with long basal shoots bearing a bud 

 of ovate-lanceolate leaves. Prothallium (protonema) eSulgent 

 as a smaragd. — Dark caverns of sandstone rocks or (in Can.) 

 on roots of stumps. Eur. not r. Swedenl Amer. Can.: Macoun. 



Fam. 16. EustichJacesB. 



67. Eustiehia Bridel. 

 l.E.imtoricata Desvaux. — Fissidens Desv.; Eustiehia Kindb.; 

 E. norvegica Brid. (incorrect name). 



Leaves entire: lower short truncate or apiculate, upper acu- 

 minate; costa not excurrent. Perichetial leaves very much lon- 

 ger, long-subulate distantly crenulate, often hyaline at apex. 

 Capsule globose chestnut- colored scarcely emergent above the 

 points of perichetial leaves; pedicel shortish arcuate when moi- 

 stened. Dioecious very r. fruit. — Shaded sandstone rocks r. 

 Amer. U. S.: Sullivant; Cheney, fruit.; RoeU; Mrs Britton. Eur. 

 >- Iceland: Vahl»: Schimper. 



Fam. 17. PolytrichaceEB. 



68. Catharinea Ehrhart. 



1. Lepidophyllae. Leaves undulate, furnished with trans- 

 verse rows of scales at back. Mostly paroecious. 



2. Leiophyllae. Leaves not distinctly undulate, without 

 scales. Dioecious. 



1. Lepidophj'llae. 



A. Leaves broader at base. Capsule strangulate; calyptra 

 smooth. 



l.C.Selwyni Austin. — Atrichum Aust.; Catharinea Kindb. 

 revue bryol. 1894. 



Leaves broad oblong-lanceolate obtusate subobtuse, dentate 

 to below middle, very chlorophyllose above, pellucid and some- 

 times rufescent below, spreading when moistened; lamella us. 

 6; costa dentate at back. Capsule nearly straight. Paroecious. 

 — On earth or stumps r. Amer. Can.: Macoun. U. S.: Howell, 

 com. Cardot; Leiberg, com. Mrs Britton. 



B. Leaves narrowed at base. Capsule not or slightly stran- 

 gulate; calyptra scabrous at apex. 



11 



