musci. (mosses.) 677 



irregularly pinnate and, like the branchlets, subjulaceous ; leaves patent-in- 

 curved, widely cordate-ovate, with a short abrupt point, decurrent, very concave, 

 slightly striate, serrulate, the costa vanishing beyond the middle ; capsule ob- 

 long, oblique, slightly incurved, narrowly annulate ; operculum elongated-conic, 

 scarcely rostrate ; pedicels 6" -7" long; perichcetial leaves filiformly attenuated. 

 — Mountains of New England, Oakes, Frost, James, Eaton. — Approaches the 

 last species ; but that is twice as large, and has more elongated, spreading, 

 membranous, plicate, distant, and less concave leaves, with a more glossy sur- 

 face. The growth, ramification, and operculum separate it from H. hians. 



$18. CAMPYLIUM, Sulli v. — Stems prostrate, with an irregular, crowded rami- 

 fication, or ascending and fastigiately branched: leaves suddenly long-acuminate 

 from a broadly ovate base, subsquarrose, scarcely costate, scarious ; areolation minute, 

 linear, flexuous: capsule subcylindrical, erect -cernuous : operculum convex-conic. 



67. H. Stellfitum, Schreb. Dioecious ; stems ascending, fastigiately 

 branched, 3' -4' high, rather stout; leaves deltoid-ovate, long-acuminate, entire, 

 ecostate, the margins reflexed below, the basal angles excavated and furnished 

 with large diaphanous cellules. — Bogs and marshes : grows in compact turfs. 

 — Fruit rare : foliage yellowish, shining. (Eu.) 



68. H. polymdrpJium, Bryol. Europ. Dioecious ; a more slender 

 species than the preceding ; steins procumbent, subpinnatcly ramulose ; leaves 

 cordate-ovate at the base, entire, less squarrosc, unicostate half-way ; without 

 diaphanous cellules at the basal angles. — Moist and shaded clayey banks. (Eu.) 



69. If. liispidulum, Brid. Monoecious, much smaller than the last ; 

 stems prostrate ; leaves not so crowded, nor so long-acuminate, obscurely bicos- 

 tate at the base; the margins minutely dentate. — Dry places, at the base of 

 trees, or on the ground ; rocky hill-sides : forming close bright-green mats. 



§ 19. HETEllOCLADIUM. Bryol. Europ. — Stems prostrate, divided, radicu- 

 lose, sparingly villous, irregularly and subpinnattly ramulose : leaves of two forms ; 

 the cauline larger, ovate-lanceolate, squarrose ; the ramuline roundish-ovate, obtuse, 

 suberect; cdl denticulate and obscurely bicostate at the base, more or less papillose; 

 central areoUe larger, oblong-hexagonal, the marginal subquadrate : capsule oblong, 

 cernuous : operculum conic, obtuse or slightly rostellate. 



70. H. dia?l6i'phasEaa, Brid. Dioecious; stems l'-2' long, filiform, 

 rigid, fragile, with minute, opaque, dark green and lustreless leaves. — Dry 

 shaded rocks, Ellis River, White Mountains of New Hampshire, James. (Eu.) 



§ 20. AMBLYSTEGIUM, Bryol. Europ. — Stems creeping, much and irregu- 

 larly branched : leaves erect-patent, rarely bifariously directed, ovate and ovate-lan- 

 ceolate, mostly entire; areolation hcxagonal-rhomboidal ; costa variable: capsule 

 oblong or cylindrical, more or less curved : operculum convex-conic. 



71. H. SBBblile, Hoffm. Monoecious; branches crowded, erect; leaves 

 distant, ovate-lanceolate, acuminate, ecostate, spreading or slightly secund, with 

 a loose areolation ; capsule oblong, suberect or slightly cernuous ; operculum 

 large, apiculate ; the basal membrane of the internal peristome narrow ; ciliolsa 

 absent. — Trees, New England. — A very minute species. (Eu.) 



57* 



