C08 MUSCI. (MOSSES.) 



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

 the shape of the operculum. Var. KAVENiiLii, 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, home on a strikingly cygncua 

 pedicel : perhaps a distinct species. 



7. II. :il>i'f isiUBii, L. Dioecious ; stems erect, sparingly and dichoto- 

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

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



2. EL6DIUM, Sulliv. Stems villous, ascending, 1 - 2-divided, distantly pin- 

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

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

 culum convex-conic. 



8. H. pa I IB <l OS 11 ill, 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. HYLOC6MIUM, Bryol. Europ. Stems villous, arcuate-ascending; divis- 

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

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

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



9. H. sqiisirrosiiHi, 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. Ifi. triquetrum, 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. H* l>revil'6strc, 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, Allegh any Mountains. 

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



4. PLEUR6ZIUM, Sulliv. Stems villous, arcuate-prostrate, increasing by an- 

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

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

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

 or conic-acuminate. 



12. H. SpleiftdeilS, Hedw. Dioecious; stems 3' -6' long, composed of 

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

 broadly ovate-oblong, cirrhose-acuminate, shortly 2-costate, serrulate ; opercn- 

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



13. H. UlllbrutUIII, Ehrh. Dioecious; stems fasciculatcly and bipin- 

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



