MUSCL (mosses.) (75) 675 



branches sparingly ramulosej cauline leaves subcomplanate, decurved at the 

 apex (those of the branches secund-falcate), ovate-lanceolate, minutely seiTulate 

 above ; capsule cernuous, incurved-oblong ; operculum convex-conic. — Wet 

 rocks on the ground, forming, loose spongy masses, New York : rare. — Resem- 

 bles No. .50, and large forms of No. 47 ; but its ramification and mode of growth 

 are quite different. (Eu.) 



§ 16. EHYTfDIUM, Sulliv. — Stems prostrate; the main divisions robust, rigid, 

 arcuate-ascending, irregularly pinnate, with short subuncinate branchlets: leaves 

 ovate-lanceolate, attenuated, often secund and sub/alcate, undulate-rugose, semicos- 

 tate ; areolation compact, linear, Jlexuous : capsule cylindrical, arcuate-horizontal : 

 operculum conic, shortly rostellate : calyptra large. 



54. H. mgdsillll, Ehrh. Dioecious; stems erect, 2' -3' high; foliage 

 yellow or fulvous. — Grows in large elastic cushions, mostly in exposed places, 

 on limestone rocks : not uncommon j but extremely rare in fruit. (Eu.) 



§17. BRACHYTHECIUM, Bryol. 'Evccoj). — Stems prostrate, rarely suberect; 

 ramification profuse, irregular, occasionally subpinnate : leaves ei-ect-patent, usually 

 ovate or ovate-lanceolate, more or less acuminate, the margins below recurved; areo- 

 lation rhomboidal, more oi- less elongated; costa ceasing half-way, or continuous: 

 capsule ovate or oblong, cernuous or suberect : operculum convex-conic : pedicel 

 smooth or scabrous. 



* Pedicels smooth. 



55. H. uitens, Schreb. Monoecious; stems tomentose, suberect, 3' -5' 

 long, interruptedly and subpinnately ramulose ; leaves yellowish-green, shining, 

 elongated-lanceolate, attenuated, strongly sulcate-plicate ; costa light, subcontin- 

 uous ; capsule oblong, cernuous ; operculum short, convex-conic, apiculate ; an- 

 nulus large; pedicels l'-2' long. — Sphagnous swamps. Northern and Middle 

 States. (Eu.) 



56. H. saleltrosum, Hoffm. Monoecious; stems 3' -4' long, prostrate, 

 irregularly branched ; leaves moderately acuminated from a rounded base, sub- 

 seiTulate, slightly striate ; areolation broader and more lax near the base ; costa 

 slender, vanishing about midway ; capsule gibbose-ovate, turgid, cernuous ; an- 

 nulus small ; pedicels 6" - 10" long ; pei-ichsetial leaves subsquarrose. — On the 

 ground, decayed logs, rocks, &c. ; common and variable. — Foliage yellowish- 

 green and shining. (Tab. V.) (Eu.) 



57. H. Isetum, Brid. Very like (and often confounded with) No. 56 ; 

 but more slender, with an erect-cemuous oblong-cylindrical capsule and dioecious 

 inflorescence. — Similar situations. 



58. H. a.cuniiiia,tlllii, Beauv. Dioecious ; resembles the last species ; 

 but is every way smaller ; stems prostrate, closely entangled ; the branches 

 crowded, ascending ; leaves slightly spreading, ovate-lanceolate, serrulate near 

 the point, costate beyond the middle, the margins broadly recurved ; capsule 

 cylindrical, nearly regular, erect, or slightly curved ; anmdusnone; ciliola of 

 the inner peristome present or absent. (Leskea acuminata, J7e6?w.) — On the 

 ground and decayed logs, in moist, shady places. — Prominent among its many 

 varieties are var. RUPiNCOLUM : leaves shorter ; branches subjulaceous ; capsule 



