NEW AND RARE SCOTTISH MOSSES 119 



CAMPYLOPUS PELIDNUS (described 1887). Similar to 

 C. atrovirens, but with stems stronger, shorter, and the leaves 

 more closely set and somewhat spreading. Leaves not hair- 

 pointed, but with several pellucid teeth at apex. No auricles, 

 but only very rarely small spaces at base composed of cells 

 with thin walls such as may be seen in other non-auricled 

 species. A section of the leaf reveals three nearly equal 

 rows of cells with thick walls, here and there translucent in 

 the centre. Nerve about one-third the breadth of the leaf 

 near the base ; upper cells long, rhomboid, dark, containing 

 nuclei and much granular matter. Benbecula, 1885. 



CAMPYLOPUS SHAWII assumes many forms, and it has 

 as varied aspects. One specimen, on a large scale, with 

 abundance of red (not brown) tomentum giving the moss 

 the appearance of some aspects of C. flexuosus, I have named 

 the variety rufnlus. In the specimen before me the leaves 

 are denticulate at apex as well as considerably down the 

 margins. The nerve is about one-half the breadth of the 



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leaf near the base. Auricles in young leaves colourless, 

 large, and hollow ; in older leaves wine coloured, large, 

 extending right across to the nerve, suggesting in this 

 respect also C. flexuosus. Benbecula, 1885. 



CAMPYLOPUS BREVIPILUS, var. ATTENUATUS, differs from 

 the type in the long slender stems, two to four inches in 

 length, not showing the fasciculated innovations of the leaves, 



& *J 



but merely slight interruptions indicative of renewed growth, 

 quite as in the other species ; leaves not hair-pointed, with 

 involute margins (almost touching), and not reflexed so far 

 as can be seen ; no auricles, but merely here and there 

 small pellucid spaces composed of cells with thin walls ; 

 upper areolation longer and more slender, .035 .05 x .004 

 .006 mm. A section of the nerve shows two to three 

 rows of dark small points, at times irregularly disposed, 

 but without the intermediate pellucid cells. Unst, Shetland, 



1886. 



In deference to two botanical friends, I have agreed, 

 meanwhile, to allow this moss to remain as a variety, mainly 

 because neither they nor I have completed investigations 

 into the structure of the nerve. 



