— 283 — 



— Calcareous stones and walls or (in Amer.) on earth, not 

 common. Eur. Switzerl.l Austria: Breidier. Norway; Zetter- 

 stedt. Amer. Can.: Macoun; Drummond 114. 

 *D.xanthopus Kindb. — Desmatodon Kindb. cat. Can. m. 



Leaves less chlorophyllose; costa greenish. Capsule larger; 

 teeth more united; pedicel yellow not red. — On earth r. Amer. 

 Can.: Macoun. 



2.D.eainptothecins Kindb. — Desmatodon cat. Oanad. m. 



Differs from D. cernuus: Leaves narrower and longer, sub- 

 obtuse gen. entire, nearly smooth, reflexed only near base; 

 costa greenish. Capsule arcuate pale brown or pale red; teeth 

 short cut in 2 — 4 partly cohering segments; lid with oblique 

 beak; pedicel flexuous arcuate when young, reddish yellow. — 

 Rocks near Atlantic sea r. Amer. Can.: Macoun; Waghorne. 

 118. Weisia Ehrhart. 



A. Leaves long narrow, serrate at the broad base, at least 

 the perichetial. Dioecious. Stem us. high. 



I. Eucladium. Capsule long-exserted; lid deciduous; teeth 

 more or less cleft; annulus persistent or indistinct. Leaves not 

 recurved, gen. faintly crisped when dry; cells pellucid; costa 

 excurrent. 



B. Leaves broad entire crisped. Monoecious or paroecious. 



II. Pseudo-Pottia. Capsule long-exserted; teeth often present; 

 lid deciduous. Leaves concave often recurved; upper cells 

 small; costa sometimes excurrent Habit of Pottia. Stem low. 



C. Leaves entire narrow gen. sublinear. 



a. Leaves often involute us. crisped; costa often excurrent. 

 Stem low. Often monoecious. 



III. Astoinnni. Capsule not emerging above upper leaves; 

 lid persistent or loosed with difficulty; teeth none. Stem very 

 short. 



IV. Hymenostomuni. Capsule long-exserted; lid deciduous; 

 teeth none. Leaves crowded; costa excurrent. Monoecious. 



V. Eu-Weisia. Capsule long-exserted; lid deciduous; teeth 

 present at least rudimentary, us. entire. Leaves crowded; costa 

 sometimes not excurrent. 



b. Leaves not involute and not or slightly crisped; costa 

 not excurrent. Dioecious. Stem often high. 



VI. Hymenostylium. Capsule without peristome; lid systylic; 

 annulus none. Leaves partly recurved; upper cells more or 

 less pellucid. 



