— 69 — 



with falcate filiform nearly entire point; costa gen. obsolete. 

 Branch-leaves broadly ovate-lanceolate; costa vanishing near or 

 above middle. Capsules unknown. Stem pinnate sparingly 

 radiculose. Tufts loose olive-green. Habit of Eurhynchium 

 Bolcenderi. — Wet places in woods r. Amer. Can. Vane, isl.: 

 Macoun. 



50. Taxithelium Mitten. 

 l.T.planum Bridel. — Hypnum Brid.; Taxithelium Mitt. 



Leaves from contracted base broadlj' suboval acute denticu- 

 late sometimes short-acuminate; alar cells subrectangular. Cap- 

 sule small piriform inclined; teeth yellow; segments as high; 

 cilia present; lid apiculate; pedicel reddish yellow very long. 

 Stem prostrate subpinnate; branches approached. — Amer. r. 

 »U. S.»: Lesq. et Jam. (Cuba: Wright, com. C. Mueller). 

 51. Plagiothecium Br. eur. 



A. Branches complanate. Often dioecious. 



a. Leaves undulate. 



!■ Pseudo-Neckera. Leaves decurrent large gen. quite entire. 

 Capsule large arcuate; lid rostrate. Branches long often simple. 

 Dioecious. 



b. Leaves not undulate. 



II. Eu-Plagiotliecium. Leaves decurrent gen. quite entire 

 often large. Capsule oblique or straight; lid r. rostrate. Plants 

 often robust. 



III. Isopterj'gium. Leaves not decurrent us. not large often den- 

 ticulate. Capsule mostly oblique or arcuate; lid obtuse or ro- 

 stellate. Plants not robust. Stem not long. 



B. Branches not or faintly compressed. Monoecious. 



IV. Pseud-Isopterygium. Leaves neither undulate nor de- 

 current nor large, gen. quite entire, sometimes curved when 

 dry. Capsule straight or faintly curved; lid obtuse or rostellate. 

 Stem sometimes long. 



I. Pseudo-Neckera Kindb. 

 l.P.undulatum L. — Hypnum L.; Plagiothecium Br. eur. 



Leaves subovate acute short-acuminate or obtusate, r. denti- 

 culate at acumen, short-decurrent, gen. crowded; upper cells 

 narrow linear, lower lanceolate exc. the not well-defined alar. 

 Leaves of the branchlets narrower, often long-acuminate. Capsule 

 striate when dry; pedicel long. Branches pale or whitish green 

 sometimes subturgid. Tufts gen. loose. — Earth and siliceous 

 rocks in woods. Eur. not r. Sweden, Norway, Germany, Francel 

 Amer. Can.: J. Macoun. Alaska: J. M. Macoun. 



