668 (68) Musci. (mosses.) 



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

 the shape of the operciilum. — Var. Eavekelii, which occurs in South Caro- 

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

 slender, and Avith a longer conic, acute operculum, home on a strikingly cygneus 

 pedicel : perhaps a distinct species. 



7. H* abietinuni, L. Dioecious ; stems erect, spaiingly and dichoto- 

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

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



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

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

 areolation dongated-rhomboidal : costa continuous : capsule oblong, cernuous : oper- 

 culum convex-conic. 



8. H. paluddsum, Sulliv. Dioecious; stems 3' -4' long; leaves yel- 

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

 Swamps, Northern and Lliddle States. 



§3. HYLOCOMITIM, Bryol. Europ. — Stems villous, arcuate-ascending; divis- 

 ions few, irregularly pinnate ; leaves broadly lanceolate, viore 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. H. squarrdsum, 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. H. triqiietrnin, L. Dioecious ; divisions of the stem somewhat 

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

 ing, from a broadly triangular-lanceolate naiTow base, sulcate, sparsely papQlu- 

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

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



11. H. brevirostrc, 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. — Eocks, and base of trees, Alleghany Mountains. 

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



^ 4. PLETJE6ZIUM, 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-Jlexuous : capsule roundish-ovate : operculum conic, 

 or conic-acuminate. 



12. H. splendens, 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, sen-ulate; opercu- 

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



13. H. umbratum, Ehrh. Dioecious; stems fasciculately and bipin- 

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



