112 [CONES MUSCORUM; 



LEPTODON TRICHOMITRION (Hedw.% Brid. 



Tab. 71. 



Plants mediocres, rigidiusculae, caespites latos elasticos e 

 flavescente virides efficientes. 



Caulis primarius filiformis, defoliatus, arete repens, caules 

 secundarios 1-2 unciales subpinnatim brevi-ramulosos copiose 

 exserens. 



Folia conferta, erecto-patentia, ovato-lanceolata, longius acu- 

 minata, concava, margine recurva, plus minus plicato-implana, 

 ecostata, minute areolata ; areolis oblongis vel fusiformibus, mar- 

 ginalibus praicipue versus basin minoribus subquadratis : folia 

 perichsetii exserti laxius texta ; superiora elongata, vaginantia, 

 tenui-acuminata, ultra capsulae basin porrecta. 



Flores monoici : masculi gemmacei axillares ; antheridiis 

 paucis eparaphysatis. 



Capsula oblongo- vel ovato-cylindracea in pedicellum sui longi- 

 tudinis onmino perichastio occultum sensim defluens, leptoderma, 

 exannulata ; peristomii externi dentibus sedecies lanceolato-line- 

 aribus albidis remotius articulatis baud raro in linea divisuriali 

 hie illic pertusis, interne membrana tenuissima lata truncata 

 interdum libera ac integra pro more dilacerata dentiumque faciei 

 internae adhacrente ; opercnlo conico longius rostrato ; vaginala 

 pilis longissimis e perichaetio eminentibns obsita ; calyptra pilosa. 



Leptodon trichomitrion, Molir. Obs. ; Sulliv. Muse. Alleghan. No. 88 ; 



Mosses U. States, p. 5 7. 

 Lasia trichomitrion, Brid. Bryol. Univ. 2, p. 201. 

 Pterigynandrum trichomitrion, Hedw. Sp. Muse. p. 82, t. 16. 



Var. immersus ; statura minore ; foliis latioribus ; perichaetiali- 

 bus brevius acuminatis ; capsula subiramersa ; peristomii dentibus 

 densius articulatis, etc. 



Leptodon immersus, Sulliv. & Lesqx. Muse. Bor.-Amer. Exsicc. (ed. 1), 

 No. 234. 



