MOSSES FROM TARBERT IN HARRIS 113 



the apex being green, the thickening of the leaf in an upward 

 direction, the breadth of the nerve, the size and habit of the 

 plant, etc. 



It is allied to Gr. obtusa, which, however, has the pagina 

 unistratose throughout as well as the margin, and the nerve 

 near the base is only about one-ninth the breadth of the leaf. 

 It has also rather close relationships to Gr. elliptica, but as 

 the differences are obvious they need not be enumerated. 



In the clefts of rocks and on the ground near Tarbert. 



I have lately ascertained that in the moss described as 

 Campylopus brevipilus, var. attenuates, in the " Annals " for 

 April 1897 there is a group of cells which I have elsewhere 

 named the central basal group, composed, in this instance, 

 of long, undulating cells with osculating pores, occasionally 

 seen connected by very slender tubes, and that the anterior 

 of the three rows of cells, seen in a cross-section of the nerve, 

 is nearly entirely suppressed. Accordingly, this moss should 

 have specific distinction, more especially as it is closely 

 allied to C. (Trachypogon} aurescens. 



In my botanical rambles I now seldom direct much 

 attention to flowering plants. Still, I cannot refrain from 

 picking up any specimen presenting appearances unfamiliar 

 to me. I cannot recall any such, nor indeed any that 

 arrested my attention except Scutellaria minor. The extra- 

 ordinary size and peculiar appearance of Potentilla anserina 

 give an almost distinctive feature to the roadside botany of 

 this queer division of the British Islands, a part of which, 

 viz. South Harris, is destitute of Bracken, and, as is alleged, 

 has neither moles nor frogs nor, presumably, toads. 



Since writing the above I have discovered, in the collec- 

 tions from Tarbert, a tuft of Grimmia microcarpa (Bridel) ; 

 the first, to my knowledge, I have ever picked up, and 

 probably the second ever secured in Great Britain. This 

 is a very characteristic moss when viewed under the micro- 

 scope, but, as I now know, very apt to be mistaken for 

 others of this section of the Grimmiae. 



Grimmia halophila (Strn.), described in a recent number 

 of the " Annals," has also turned up in Tarbert ; and, on 

 the other hand, Campylopus pclidnus (Strn.), originally 

 38 E 



