MOSSES FROM THE WESTERN HIGHLANDS 93 



plane, entire, havinjr two rows of cells less than half the 

 breadth of those of the rest of the pagina but longer ; cells 

 at base in two to four transverse rows (across base), oblong 

 or quadrate, with thickish, opaque walls, •025-"032 by "012- 

 *022 mm., those above for the rest of leaf acutely rhomboid, 

 large, close, •04-"o6 by •oi4--02 mm. Leaves almost destitute 

 of chlorophyll. 



This moss is certainly distinct from B. argenteuni in the 

 narrow border-cells of the leaf, in the nerve which reaches 

 the apex and, from the character of the cells in the lower 

 part of the acumen, probably extends a little into it, as well 

 as from the length and constitution of the acumen itself 

 which, in B. argentciim, is only represented by a bluntish 

 knob; lastly, from the differences in the shapes of the leaves 

 as well as from differences in the paginal cells in the two 

 mosses. 



In woods in Lovedale, near Gairloch. Only one long, strong 

 seta was observed in a tuft, but as it dropped off I could not 

 found an}^thing on it. 



At Onich, on Loch Linnhe, a tuft of PlagiotJiecimn Millleri 

 was picked up in fine fruit. The station is unusual, not 

 many feet above sea-level. This is the only specimen 

 which has been found in fruit in Great Britain. 



In 1909 at Onich, on Loch Linnhe, a moss was discovered 

 to which a proper place could not be assigned, but as the 

 same moss was secured in 191 1 at Gairloch, I feel constrained 

 to give an outline of its main characteristics. 



Barbula incavata, sp. nov. — Tufts large, very dense, green 

 above, changing in the herbarium to a dingy yellowish green, 

 brown below ; stems simple or slightly branching, slender, 

 about half an inch long ; leaves incurved when dry, spreading a 

 little and straight when moist, hollow throughout, elliptical or 

 narrowly so, length r5 mm. by "35 mm. in breadth near middle, 

 blunt and round at apex; margin plane, slightly incurved 

 towards the summit, faintly crenulated or nearly entire ; nerve 

 strong, pale, then fulvous, vanishing a little below apex ; 

 cells at inner base oblong or somewhat rhomboid, detached, 

 ultimately pellucid, variable, •022--04 by •oo8-'Oii mm., 

 outwards smaller, thinner, ultimately hyaline, latit. •006- 

 •008 mm. across, upwards changing transversely into others, 



