(358) 



diameter, basal cells .008 or .009 mm. wide and from nearly 

 square to twice longer than wide (163). 



Barbula cylindrica (Tayl.) Schimp. Columbia Falls, 3,100 

 ft., on rock. These specimens have an excurrent costa, upper 

 leaf-cells distinct, .008 mm. in diameter and lower cells up to 

 .012 mm. wide. The stem leaves decrease in size downward 

 much more than in the preceding (325). 



Barbula gracilis (Schleich.) Schwaegr. Tenderfoot Cr., 

 Belt Mts., on rock. Sterile specimens probably this (143). 



Barbula perannulata n. sp. (Plate 36.) 



Dioicous. Plants small, %-i cm. high. Upper leaves 

 mostly linear with broad, obtuse or slightly acute point. 

 Outer perichaetial leaves very similar with slightly enlarged 

 base, the middle with a more or less distinct limb and the 2 

 or 3 inner, convolute with a distinct, narrowed point usually 

 Y± or more the length of the clasping part, the outer peri- 

 chaetial leaves extending to or above the tips of the inner. 

 Upper leaves up to 2 mm. long, deeply channeled and crenu- 

 late-papillose on margin above, lower leaves 1 mm. or less, 

 all with flat borders and costa vanishing below the apex. 

 Leaf-cells distinct, roundish above, .006-. 008 mm. in diam- 

 eter with 1 or 2 papillae to each cell. Lower cells hyaline, 

 somewhat irregular, 2-4 times longer than wide. Capsule 

 ovate-oblong, with lid up to 23^ mm. long, the lid often nearly 

 as long as capsule. Annulus large, of 3 rows of cells. The 

 twisted, papillose teeth from a solid basal membrane about 

 yi the height of the teeth. Mouth of capsule with 5 or 6 

 rows of small roundish cells with groups of 4 or 5 twice 

 larger cells interspersed here and there. Smooth spores up 

 to about .008 mm. 



This species is near convoluta but may be distinguished at 

 once by the perichaetium. In convoluta the sheathing leaves 

 project one-half or more above the tips of the next surround- 

 ing leaves and are mostly truncate-crenulate or with a very 

 short point. On earth, June 18, 1894, Columbia Falls (292). 

 Also collected by J. B. Leiberg, Traille River Basin, Idaho 

 (190). 



Barbula tor tuosa (L.) Web. & Mohr. Belt Mts., June; 

 Columbia Falls, Oct. (25). 



