670 musci. (mosses.) 



somewhat obtuse, serrulate ; costa ceasing near the apex. — "Wooded hill-sides, 

 on the ground. (Eu.) 



20. II. divei'SifdliMBBS, Bryol. Europ. Dioecious; very near the pre- 

 ceding, but has a more simple ramification, obtuse turgid branchlets, and leaves 

 more densely imbricating; those of the stem and branches deltoid-ovate, acumi- 

 nate, sulcate; (hose of the branchlets ovate-obtuse. — Sandy soil; hilly por- 

 tions of Southern Ohio, Lesquereux, (Eu.) 



21. SI. 13<3scbs, Schwaegr. Dioecious ; stems prostrate, with a somewhat 

 fasciculate ramification; brandies elongated, turgid, terete, obtuse, flaccid; 

 leaves densely imbricated, ovate from a broad auriculate base, apiculate, very 

 concave, serrate ; costa extending more than half-way. — On the ground, mostly 

 in hilly and wooded districts. — A large species, with golden yellow foliage: 

 does not well associate with the four preceding species in a natural arrange- 

 ment. 



§ 8. RHYNCOSTEGIUM, Bryol. Europ. — Stems prostrate, irregularly branched, 

 more or less compressed: leaves orate and ovate-lanceolate, unicostale or shortly bi- 

 costate; areolation somewhat loose, elongated-rhomboidal : capsule oval and inclined, 

 or oblong and cernuous : operculum rostrate. 



22. IS. scrrialatimi, Hedw. Monoecious; leaves pale green, membra- 

 nous, lax, hilariously directed, spreading, ovate-lanceolate, acuminate, serrulate, 

 costate beyond the middle; capsule oblong, cernuous. — On the ground, in dry 

 woods, forming thin strata ; occasionally condensed, the branches becoming 

 cylindrical. 



23. SI. dcpIsiBGfgtllBBB, W. P. Sch. Dioecious; stems and obtuse branch- 

 es very flat, profusely rooting underneath their whole length ; leaves bright 

 green, shining, crowded, distichously imbricating, broadly ovate-lanceolate, ser- 

 rulate, shortly bicostate ; capsule gibbose-oblong ; annulus narrow. (H. depres- 

 sum, James, in Proceed. Amer. Acad. 1855.) — Dry woods, in close, thin mats, 

 near the ground, on stones and roots of trees. — Fruit rare. 



24. SS. rsiscif&B'asec, Weis. Monoecious; branches somewhat arcuate, 

 fasciculate, elongated, very slightly compressed ; leaves oblong-ovate, shortly 

 acuminate, sharply serrate, sometimes subsecund, costate nearly to the apex; 

 capsule oval, rather incurved ; annulus large. — Mountain rivulets : frequent. — 

 A rather rigid species, with lurid green foliage of a firm texture. (Eu.) 



§9. RAPHIDOSTEG1UM, Bryol. Europ. — Stems prostrate, subcompressed ; 



ramification irregular : leaves subsecund, oblong-lanceolate, ecostate or shortly bicos- 

 tate ; the margins reflexed ; areolation minute, linear, flexuous ; the 3-5 cellules 

 at each of the basal angles large, oblong, inflated: capsule oblong, suberect or cer- 

 nuous : operculum subulate : small species. 



25. SI. <ICiial§S83B'Sa, Wils. Monoecious ; stems filiform, elongated, spar- 

 ingly branched ; leaves yellowish, shining, rather lax, narrowly acuminate, 

 ecostate; capsule narrowly elliptical, horizontal, cernuous. (H. Bugelianum, 

 Brijol. Europ.) — Mountainous districts. — Usually grows in thin flakes, on the 

 inclined faces of moist exposed rocks : variable. When much shaded, and on 



