396 BRYACE.^. [nijpnum. 



Var. longirostre, Bmcli & Schimp. Loosely intricate- 

 cesi)itose, drooping; stems slender, much branched and ramu- 

 lose: leaves subsecuiid : capsule slender, erect; operculum 

 subulate-rostrate. 



ll.vu. Trunks, roots of trees, stones, etc.; very common in mountain 

 regions, and very variable. BesLles the more important varieties described 

 and figured by 13rudi & Scliimper, as above, tliere are numerous more or 

 less marked intermediate forms wliicli render tlie determination of tlie 

 species dillieuit and often uncertain. 



159. H. curvifolium, Hedw. Plants large, intricate, ces- 

 pitose, yellowish green, glossy ; stems prostrate, with few 

 branches, i)innately ramulose ; branchlets short, unequal, com- 

 pressed : leaves crowded, imbricate in two rows, falcate-secund 

 sidewise, auricled-cordate at base, gradually long-acuminate, 

 coiu^ave, slightly serrulate above, ecostate or shortly and obso- 

 letely bicostate ; cells very narrow^ linear, flexuous, pale, at the 

 base and angles shorter, broader and golden yellow ; perichtetial 

 leaves whitish, numerous, erect, close, loosely areolate, the inner 

 sheathing: capsule long-pedicellate, large, oblong, turgid, in- 

 curved-cernuous, thin, arcuate and distinctly costate when dry; 

 operculum conical, a])iculate; teeth yellow, broadly lamellate 

 inside ; segments slightly cleft ; cilia two or three, nearly as long 

 as the segments ; annulus trii)le, revoluble. — Spec. Muse. 285, 

 t. 75; SuUiv. Mosses of U. States, 74, and Icon. Muse. 183, 

 t. 114. Stereodon cicrvifoUus, Brid. 1. c. G13. 



Hai?. Growing in large mats on decayed logs in shady woods; very 

 common. 



Sterile specimens of a peculiar aspect, generally considered as a variety 

 of this species, appear to be an intermediate form between it and //. 

 arcuatniii, Lindb., differing from IT. curvifolium in the base of the leaves 

 excavate, anricled or decurrent, with very long alar cells, and the borders 

 less generally denticulate. Renault, who has made a special study of this 

 group, considers this form as rather a species than a variety. It abounds 

 around Baltimore (commimicated by J. Donnell Smith, Fitzgerald, etc.), 

 but as yet only found sterile. 



160. H. complexum. Widely cespitose, pinnately ramu- 

 lose : leaves secund, larger at the base, ovate-lanceolate, hooked, 

 concave, sliortly bicostate; borders very entire; basal cells 

 numerous, short, sub(]uadrate, obscure, the npper long, narrow, 

 slightly prominent at the u])per end ; pericha?tial leaves long, 

 erect, oblong, subulate, the inner lanceolate, abruptly subulate, 

 subserrate, plicate : capsule cylindrical, unequal, inclined ; teeth 



