NEW AND RARE SCOTTISH MOSSES 109 



relatives. In this the areolation of the base agrees with 

 that shown in the Broadford specimen. 



Grimmia Jicuiipolia. Tufts small, convex, very dense 

 and compact ; stems mostly fastigiate, at times merely 

 clichotomously branched ; lower leaves ovate, small, often 

 hairless, enlarging and elongating upwards, and ultimately 

 forming a comal tuft with long denticulate hair-points, 

 margin plane ; nerve bulging behind, narrowly concave in 

 front, showing, in cross -section, 3 rows of cells below, 

 generally 2 above, narrow, about 45 p in breadth below, 

 widening a little upwards and then narrowing towards the 

 apex ; cells at central base nearly colourless, 30 to 45 by 

 6 to 8 p, outwards much shorter, r 3 to i 8 ^ in length, with 

 from 3 to 6 marginal rows of cells, longer and hyaline, 

 upwards shortly sinuose, 14 to I 8 /^, quickly ending in the 

 dark, obscure upper areolation, 7 to 9 ^ in diameter ; 

 pagina unistratose below and about 14 ^ in thickness, with 

 occasionally one marginal transverse couple of cells, in upper 

 third or thereby, with several transverse couples (2 to 5), and 

 near apex almost entirely bistratose ; capsule pale, elliptical 

 on a longish pale seta extruded a little beyond the tips of 

 the leaves, lid reddish with a longish paler, slender apiculus, 

 calyptra mitraeform scarcely extending beyond the base of 

 the lid. Inflorescence monoicous, perigonia generally on a 

 lateral branch, inner perigonial leaves blunter, hairless, and 

 much more laxly and transparently areolated. 



I am under the impression that Limprecht's description 

 of the leaf-base of Gr. Doniana accords more with this than 

 with the genuine plant, while Dr. Braithvvaite's description 

 of the same follows much on the same lines. 



A recent closer investigation of the Grimmi;e from 

 Tarbert in Harris has shown one which I had previously 

 associated (doubtfully, I must confess) with Grimmia sub- 

 lurida (Strn.) from the same locality. It has the general 

 appearance of a rather coarse form of the latter, but a 

 microscopic investigation of the leaves has revealed the 

 presence of a finely and closely papillose condition of the 

 upper third or even half of the leaf, while the hyaline acumen 

 is also papillose, at least in its lower half. The papilla; are 

 very minute, not more than 2 to 2.5 //, in height, and thus 



