Contributions to the Study of 



Japanese Bryophyta: 



I. On two new Genera of Musci. 



By 

 S. Okainura. 



Kochi-ken First Middle School. Tosa. " 



{Continued from p. 31.) 



With Plates I and II. 



Okamuraea cristata Broth n. gen. 



Jap. Name. Tosakaha-Okatnuragoke. 



On bark, densely caesptose, green, glossj% Rhizoid fascicled 

 on the stem here and there, pale-brown, usually simple but some- 

 times branched, 0.6 to 1.0 mm. long, 0.014 mm. wide. Stem long, 

 arcuate-repent, and stoloniferous at the apex, brown, cylindrical, 

 6.— 10. cm. long, sometimes attaining to 20. cm., 0.43 mm. in 

 diameter ; transparent roundish-elliptical cells in the middle, 

 0.017 mm. in diameter, brownish-yellow sclerenchymatous cells 

 at the periphery, epidermis roundish-elliptical ; branches numer- 

 ous, irregularly pinnate, subfascicled, erect or oblique and often 

 curved, densely foliose, cylindrical, attenuate, 1.-3. cm. long, 

 larger branches often with 2—4 branchlets, rhizoid almost absent. 

 Leaves clear green, glossy, densely convering the young stem 

 and branches, pluriseriate, but almost absent from older stem, 

 connivent at stem when dry, erect-patent when moist, elliptical- 

 ovate or ovate-lanceolate, sublato-acuminate, broadly concame- 

 rate at surface in the margin, two-plaited at the base, short 

 decurrent, entire, stem-leaf 1.5—1.7 mm. long, 0.5 mm. wide, 

 branch-leaf 2. mm. long, 0.8 mm. wide, but the superior leaves 

 being smaller than these ; costa green, slightly prominent at 



