obtuse or short-pointed. Capsule erect symmetric; segments 

 rimose. Tufts bro-^vn gen. eradiculose. — Alp. rocks r. Eur. 

 Switzerl. near Churwalden in Graubuenden 1888! 

 9.P.affliiis Limpricht. — Ptychodium Lpr.; Pseudoleskea Kindb. 



Differs from P. plicaia: »Leaves long-decurrent narrower and 

 narrowly reflexed, those of branches costate to middle. Para- 

 phyllia few. Capsules unknown. ■ — Alp. rocks r. Eur. Austria: 

 Breidler»: Limpricht. 



lO.P.hyperborea C. Mueller. — Ptychodium C. M. in litt.; 

 Pseudoleskea Kindb. 



Differs from P. plicata: Leaves shorter and broader, all en- 

 tire; those of stem ovate short-acuminate, those of branches 

 from ovate base long-acuminate or ovate-lanceolate. Branches 

 simple julaceous. Capsules not seen. — Arctic district r. Eur. 

 Norway near Nord-Cap 1892: W. Baur, com. C. Mueller. 

 11 .P.sciuroides Kindb. bull. Tor. club XVII. 



Leaves from ovate base narrowed to a shorter (subulate or 

 fiUform) nearly entire acumen, not decurrent; cells hyaline, 

 only at insertion yellow, upper lanceolate, middle oblong-lanceo- 

 late. Perichetial leaves more attenuate to the subdenticulate 

 acumen; costa none or indistinct. Capsule oblong suberect or 

 inclined; peristome orange; teeth hyaline-bordered without di- 

 stinct longitudinal line; segments scarcely lower; their basal 

 membrane very low; cilia not appendiculate; pedicel 1,5 c. m. 

 long; lid not seen. Tufts loose sparingly radiculose pale green. 

 Branches few curved irregularly divided. — Rocks r. Amer. 

 Can. Rocky mts: Macoun. 

 * P.denudata Kindb. (cat. Can. m. as var.) n. subsp. 



Stems very long about 10 c. m., nearly simple, naked below 

 without rhizoids. Capsules unknown. — Rocks in higher alp. 

 region r. Amer. Can. Brit. Col.: !Macoun. 



B. Leaves not large, nearly appressed when dry, not or 

 slightly curved, us. denticulate at acumen. Habit of Lescurcea. 



a. Leaves distinctly papillose; copta sometimes excurrent. 

 12.P.rigescens "Wilson. — Leskea WUs.; Pseudoleskea Lindb.; 

 Hypuum radicosum Lesq. et Jam. 



Leaves ovate-lanceolate or from broad base long-acuminate, 

 often long-decurrent; upper cells .^ublinear, middle suboblong; 

 costa not excurrent. Perichetial leave.> abruptly filiform-pointed 

 smooth nearlj' entire; costa .•^hort faint. Capsule narrowly 

 oblong curved; peristome pale or pale yellow; cilia none; lid 

 short obtuse; pedicel 1 — 2 c. m. long. Tufts green very 



