j cones MUSCOKUM. 57 



ORTHOTRICHUM STRANGULATUM, Beam. 



Tab. 36. 



Plants pusillae, fastigiato-ramosae, in pulvinulis laxiusculis 

 luteo-viridibus inferne fuscis degentes. 



Cajjlis 4-7 lineas altus, crassus, dense foliosus. 



Folia patula, lineali-lanceolata, obtusiuscula, carinato-costata, 

 tota longitudine margine revoluta, superne e cellulis papillulosis 

 rotundis densius areolata, inferne laxius texta; perichaetialia 

 longiora, erecta, subvaginantia. 



Flores monoici : masculi axillares ; antheridiis longe pedicel- 

 latis parapliy satis. 



Capsula emergens, oblongo-obovata vel subelliptica, sicca et 

 vacua prominenter 8-costata, angustissima, sub ore coarctata, 

 vetusta sordide rubescens ; pedicello capsula quintuplo breviore ; 

 vaginulae pilosas tubo adauctrice amplo pedicellum totum capsu- 

 lrcque basin investiente ; calyptra glabra vel raripila fusca ; oper- 

 culo conico-apiculato ; peristomii dentibu* 8 bigeminatis pallide 

 rufescentibus granulatis, siccis reflexis ; ciliis 8 filiforniibus e 

 duplici (nee simplici ut in icone) serie cellularum exstructis. 



Orthotrichum strangulatum, Boauv. Prodr. p. 81 ; Schwaegr. Suppl. 

 t. 34 ; Sulliv. Muse. Alleghan. No. 128; Mosses U. States, p. 33 ; Sulliv. 

 & Lesqx. Muse. Bor.-Amer. Exsicc. (ed. 1), No. 120. 



Hab. Trees, rarely on rocks : common. 



A small species, with short and thick stems, and densely 

 crowded greenish-yellow foliage ; the empty capsule when dry 

 very narrow, the dark-red costoe being in contact throughout 

 its entire length. It is often confounded with another closely 

 related and common species, probably O. Canadense, Br. 8c Sch. 

 (London Jour. Bot. 1843, p. 007), not of Mailer ; whi|h is dis- 



