C08 MUSCI. (mosses.) 



On decayed logs, in deep woods. — Varies in the papilloseness of the leaves and 

 the shape of the operculum. — Var. Ravenelii, which occurs in South Caro- 

 lina on brick walls, is smaller in size ; leaves more papillose ; capsule more 

 slender, and with a longer conic, acute operculum, borne on a strikingly cygneus 

 pedicel : perhaps a distinct species. 



7. H. al»ietinillll, L. Dioecious ; stems erect, sparingly and diehoto- 

 mously divided, simply pinnate ; branchlets attenuated ; capsule cylindrical, 

 suberect, slightly incurved; operculum conic. — Mts. of New England. (Eu.) 



§2. ELODIUM, Sulliv. — Stems villous, ascending, 1 -2-divided, distantly pin- 

 nate : branchlets subcompressed : leaves lanceolate, acuminate, not papillose, striate ; 

 areolation elongated-rkomboidal : costa continuous : capsule oblong, cernuous : oper- 

 culum convex-conic. 



8. M. palusJdsuiBl, Sulliv. Dioecious; stems 3'-4'long; leaves yel- 

 lowish-green, with a cordate-concave base, the margins recurved, entire. — 

 Swamps, Northern and Middle States. 



$3. HYLOCOMIUM, Bryol. Europ. — Stems villous, arcuate-ascending; divis- 

 ions few, irregularly pinnate ; leaves broadly lanceolate, more or less acuminate, 

 squarrose or rejiexed, shortly bicostate; areolation linear: capsule short, turgid, hori- 

 zontal, annulate : operculum short-conic or conic-rostellate : large and robust species. 



9. II. sqiBUJTOSMSM, L. Dioecious; leaves pale green, shining, long- 

 lanceolate from an ovate concave loosely imbricating base, acuminate, subden- 

 ticulate; capsule ovate-globose; operculum convex-conic, apiculate. — Wet, 

 grassy places, woodlands of Pennsylvania. — Seldom fruits. (Eu.) 



10. II. ttiiffllBetriBSia, L. Dioecious ; divisions of the stem somewhat, 

 fastigiate ; the branchlets elongated, deflexed, acute ; leaves bright green, shin- 

 ing, from a broadly triangular-lanceolate narrow base, sulcate, sparsely papillu- 

 lose on the back, dentate at the apex ; capsule oval, gibbous ; operculum conic- 

 mammillate. — On the ground, in woods. — The largest of our Hypna. (Eu.) 



11. II. H»5'4»vii8'<}>Stre, Ehrh. Dioecious; the branches subfasciculately 

 arranged; stem-leaves broadly cordate, suddenly acuminate, decurrent, sul- 

 cate; branch-leaves ovate-lanceolate, not squarrose; capsule ventricose-ovate ; 

 operculum conic-rostellate. — Rocks, and base of trees, Alleghany Mountains. 

 — Foliage greenish-yellow : smaller than the last two species. (Eu.) 



§ 4. PLEUROZIUM, Sulliv. — Stems villous, arcuate-prostrate, increasing by an- 

 nual, lateral, simple or 2-3-pinnate prolijications : leaves concave, patent, broadly 

 ovate or oblong-ovate, more or less acuminate, membranous, shining, shortly bicostate, 

 or semicostute; areolation linear-flexuous: capsule roundish-ovate: operculum conic, 

 or conic-acuminate. 



12. H. spB^EBdeiBS, Hcdw. Dioecious; stems 3' -6' long, composed of 

 3-5 distinct, closely bipinnate, frond-like growths or innovations; stem-leaves 

 broadly ovate-oblong, cirrhosc-acuminate, shortly 2-costate, serrulate ; opercu- 

 lum rostrate. — On the ground, in woods. (Eu.) 



13. II. iflBBBbB-atBlBBB, Ehrh. Dioecious; stems fasciculately and bipin- 

 nately branched; branchlets incurved ; leaves cordate, acuminate, plicate, bicos- 



