MUSCI. (MOSSES.) 675 



branches sparingly ramulose; cauline leaves subconiplanate, decurved at the 

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

 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 

 ure quite different. (Eu.) 



H6. RHYTfDIUM, Sulliv. Steins prostrate,- the main divisions robust, rigid, 

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

 ocate-lanceolate, attenuated, often secund and subfakate, undulate-rugose, semicos- 

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

 operculum conic, shortly rostellate : calyptra large. 



54. H. rugosuili, 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 ; but extremely rare in fruit. (Eu.) 



417. BRACHYTHECIUM, Bryol. Europ. Stems prostrate, rarely suberect; 

 ramification profuse, irregular, occasionally subpinnate : leaves erect-patent, usually 

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

 lation rhomboidal, more or 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. iiitens, 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- 

 nultis large; pedicels l'-2' long. Sphagnous swamps, Northern and Middle 

 States. (Eu.) 



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

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

 serralate, 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; perichaetial leaves subsquarrose. On the 

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

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



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

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

 inflorescence. Similar situations. 



08. H. aciiBiiiiifttlliii, 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 ; annulus none ; ciliolse of 

 the inner peristome present or absent. (Leskea acuminata, Hedw.} On the 

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

 varieties are var. surfxcoLUX : leaves shorter ; branches subjala^.eous ; capsule 



