;[92 BEYACE^. [Tetraplodon. 



or lanceolate-subulate at the apex; reticulation more dense. 

 Flowers monoecious ; male flowers gemmaceous, capituliform, 

 sessile in the axils of the leaves or terminal on separate branches. 

 Calyptra conical, cucullate, inclined. Capsule thick, with a 

 solid thick generally long apophysis covered with stomata. 

 Teeth of the peristome shorter, bigeminate, solid, dark purple, 

 reflexed when dry. Spores very small. 



1. T. angUStatus, Bruch & Schimp. Tufts compact, 

 green outside, ferruginous within; stems slender, varying in 

 length, much divided : leaves soft, passing from the oblong base 

 into a very long yellowish flexuous subulate point, serrate- 

 dentate from below the middle ; costa excurrent into the point : 

 capsule short-pedicellate, small, with larger pyriform apophysis ; 

 lid highly convex or obtusely conical; teeth ai^proximate in 

 pairs. — Bryol. Eur. t. 288; Schimp. Syn. 303. Sj^lachnum 

 angnstatum, Linn. fil. Meth. Muse. 33 ; Iledw. Muse. Frond, ii. 

 37, t. 12. S. setaceitm, Michx. Fl. ii. 287. 



Hab. White Mountains; Adirondacks ; Lalce Superior; Rocky Moun- 

 tains ; not rare. 



2. T. mnioides, Bruch & Schimp. Plants more robust: 



leaves close, imbricate, obovate-oblong, very concave, more or 



less abruptly narrowed into a flexuous yellowish acumen; 



borders entire, yellow ; costa ])ercurrent : pedicel longer, solid, 



dark orange, purple when old, enlarging above into an obconical- 



oblong dark puri)le apophysis longer than tlie fawn-colored oval 



capsule, which when empty is cylindrical and narrower than the 



apophysis; teeth linear-lanceolate, first joined in foiti's, then bifid, 



orange-colored. — Bryol. Eur. t. 289 ; Schimp. Syn. 304. /Splac/i- 



mim mnioides, Linn. fil. 1, c. 16; Iledw. Muse. Frond, ii. 35, 



t. 11. iS. vrceolatum, Iledw. 1. c. 39, t. 13. 



Hab. Catskill and Adirondack Mountains ( Olney, Lesquerenx) ; Wliite 

 Mountains {Jaines); Rocky Mountains (Drtnu'HOJuZ); S'lti^a, {TTarrinr/ ton). 



3. T. australis, Sulliv. & Lesq. Tufts more or less compact ; 

 jDlants soft, slender, green above, brownish and radiculose below, 

 sim2:>le or sparingly fastigiate-ramose : leaves soft, distant, erect, 

 long-lanceolate, gradually narrowly acuminate, distantly and 

 coarsely dentate, sometimes nearly pinnatifid, rarely entire ; 

 costa ending with the apex ; areolation very loose, oblong- 

 hexagonal : flowers moncecious and dioecious ; male flowers 



