230 Best : North American Pseudoleskea 



cilia 1-3, papillose: annulus narrow: operculum short conic: 

 spores rough, .016— .020 mm. : ripens in spring. 



On the ground at high altitudes ; collected by J. M. Holzinger 

 and J. B. Blake near Lake McDonald, northwestern Mont., July 28, 

 1898, and by R. S. Williams in fruit near Columbia Falls, Mont., 

 Oct. 10, 1895. A smaller form of what appears to be the same 

 by Dr. Bell at Cape Chudleigh, Hudsons Strait ; in Professor 

 Macoun's collection. Biyoth. Mont. no. 343, R. S. Williams/ 



P % denndata, the largest of our species of Pseudoleskea, is 

 easily recognized by its being nearly destitute of branches. It is 

 probable, however, that it will be but rarely found in this form, 

 but that transitional forms will be the more common. Var. 

 Holzingeri is distinguished from P. radicosa by its larger leaves, 

 longer leaf cells and its freedom from radicles. 



5. Pseudoleskea radicosa (Mitt.) Lesq. & James. [PL 7] 



Hypnum radicosum Mitten Jour. Linn. Soc. 8:31. 1864. 



Hypnum (Pseudoleskea) radicosum Lesq. & James, N. A. Mosses. 

 320. 1884. 



Macoania sciuroides Kindb. Enum. Bryin. Exot. 1888. 



Pseudoleskea sciuroides Kindb. Bull. Torr. Club, 17 : 276. 

 1890. 



Hypnum congestum Wils. Ms. 



Hypnum congestum Hook. & Wils. in Drumm. N. A. Mosses, 



no. 225, in part. 



In soft subsericeous tufts, yellow-green to dark green : stems 

 3-5 cm. long, somewhat densely radiculose, irregularly branched : 

 branches usually recurved, simple : paraphyllia numerous, multi- 

 form : stem leaves loosely appressed when dry, spreading when 

 moist, secund, subdecurrent, biplicate, margins narrowly recurved 

 to base of acumen : costa stout, usually toothed, disappearing in 

 the acumen, from an ovate to oval-oblong base gradually or ab- 

 ruptly contracted to a narrow, oblique, serrulate or entire acumen, 

 1. 2- 1. 6 mm. long, . 3 5 — . 5 mm. wide : cells of stem leaves some- 

 what loose, smooth on lower surface, lightly papillose on upper, 

 not rarely smooth on both : primordial utricle usually distinct : 

 basal cells oblong-quadrate, in several rows ; medial oval-oblong 

 to linear-rhomboidal, .oo8-.oiomm. wide, 2-4 times as long : alar 

 cells quadrate ; apical linear ; branch leaves falcate-secund, serrate. 

 Dioicous : perichetial bracts erect, thin, whitish, finely acuminate, 



