370 BEYACEyE. [Hypnum. 



* * * Leaves open or snhsecund. 



111. H. Muhlenbeckii, Spruce. Monoecious: more or 

 less densely cespitose ; stems prostrate or ascending ; branches 

 and branchlets crowded, erect : leaves densely crowded, sub- 

 complanate, secund on the branchlets, ovate-lanceolate, grad- 

 ually narrowed into a long filiform point, decurrent, minutely 

 and distantly serrulate, plano-convex ; costa very short and 

 obsolete, double ; cells loose, those of the decurrent angles very 

 large, inflated, dark orange ; inner perichoetial leaves half- 

 sheathing, narrowed into a long flexuous or recurved filiform 

 point : capsule suberect, cernuous, oblong-cylindrical, long- 

 necked, more or less incurved, substriate, irregularly furrowed 

 when dry, often two-colored ; operculum long-conical, obtuse ; 

 peristome small, the segments entire ; membrane large ; cilia 

 three, slender, a little shorter than the segments ; annulus 

 large, compound. — Ann. Mag. Nat. Hist. ser. 2, iii. 275. IL 

 striatellum, Brid. ; Muell. Syn. ii. 282. Plagiothecium Mahlen- 

 hecldi^ Bruch & Schimp. Bryol. Eur. t. 499. P. striatellutv., 

 Lindb. 1. c. 32. 



IIab. On rocks in subalphie regions, and grassy places in mountains; 

 frequent and variable. 



112. H. Fitzgeraldi, Renauld, in litt. Closely allied to the 

 last, differing in its shorter and stouter stems, the branches 

 short, intricate (not erect), the leaves not glossy, narrower, 

 nearly entire, and the areolation more opaque, with longer nar- 

 rower and very chlorophyllose cells. 



Hab. Decayed trunks, Florida (Fitzgerald). 



Though the characters are not very marked, the great difference in 

 habitat authorizes a separation of this peculiar form. 



113. H. pseudo-Silesiacum. Monoecious : the branches 

 somewhat piano-foliate : upper leaves appressed, the lateral and 

 lower spreading, crowded, oval, narrowly acuminate, ecostate ; 

 areolation very narrowly rhomboidal ; j^erichaetial leaves imbri- 

 cate, ovate-lanceolate : capsule oblique or inclined, oval-oblong, 

 thin, pale brown, sulcata the whole length when dry ; i)edicel 

 short (1 cm.), straight ; operculum broadly conical, short ; 

 annulus double, revoluble. — JI. Silesiacum, Hook. & Wils. in 

 Drumm. Muse. Amer. (Coll. H.), n. 111. Plagiothecium pseudo- 

 Silesiacv.m^ Schimp. Proc. Amer. Acad. xiv. 140. 



Hab. Near St. Louis [Brummond). 



