128 THE JOUENAL OP BOTANY 



calyptra was quite distinctly papillose ! However, specimens 

 sent a few weeks later with normally developed hair-points and 

 good mature capsules set any doubts at rest ; and I think it is worth 

 while putting on record this strange form. The calyptra varied 

 considerably, but was, I believe, fairly constant within each tuft ; 

 in some quite smooth, in others slightly scaberulous, while in a 

 few tufts it was quite as rough as in, e.g., Pottia Wilsoni. I find 

 the calyptra markedly scabrous also in specimens gathered at 

 Stanner Eock, Eadnor, by Eev. C. H. Binstead. The fact is the 

 more interesting because a smooth calyptra is usually given as a 

 generic character of Tortula, as contrasted with Pottia, in which 

 it is not unfrequently rough. The rather peculiar structure of the 

 nerve in this species may be here referred to, as I have not seen 

 it noticed elsewhere. Viewed from in front the nerve appears 

 slightly thickened and spongy in the upper half of the leaf; and 

 not unfrequently richly chlorophyllose cells in two or three rows 

 give it a dotted appearance somewhat as in certain exotic species 

 of Gatharinea. The explanation is seen on cutting a section. The 

 ventral cells of the surface of the nerve are large, elongate (two 

 or three times as high as wide), frequently appearing (in section) 

 subcylindric and often detached from one another except at the 

 base, and crowned with a beautiful fringe or crest of papillae. It 

 thus shows a distinct approach to the structure of the nerve in 

 T. atrovirens (Sm.) Lindb. (c/. Limpricht, Laubm. I. fig. 183), but 

 the ventral cells are less numerous (in 3-4 rows), and less elongate 

 in section ; while, on the other hand, when almost free from one 

 another they are even more striking, and give an almost lamel- 

 liferous appearance, as noted above, to the nerve. — H. N. Dixon. 



JuNcus Leersii Mars, in Berks. — Eecently a herbarium which 

 was made by Mr. W. H. Holliday, a friend of Henry Boswell, of 

 Oxford, came into my possession. Holliday was in the fifties a 

 very enthusiastic bryologist, as his herbarium testifies, while his 

 collection of local plants consisted of most carefully selected, well 

 dried, and accurately named specimens. These were chiefly 

 obtained from the neighbourhood of Oxford and of Great Marlow 

 in Bucks, many of his specimens being the earliest evidence of 

 their occurrence in the latter county. These include Lythrwn 

 Hyssopifolia L., which Gotobed recorded from near Windsor — a 

 locality which may be in Berkshire. The Oxford plants include 

 the earliest voucher for Agrimonia odorata, and," from Berkshire, 

 the Eush named above, which is a hybrid of /. conglovieratus 

 witli /. inflexus. This he gathered near South Hinksey, in 1860, 

 in the vicinity of /. diffusus, itself a hybrid (/. effusus x inflexus). 

 — G. Claeidge Deuce. 



Deaba muealis L. in Berks.— Last September, Mr. Herbert 

 Napier, who has been diligently studying the mosses near Oxford, 

 brought me a specimen of the above plant which he had found in 

 Wytham Woods, in Berkshire. I visited the spot and found that 

 it was plentifully scattered over a small planting of young ash 

 trees which had been recently cut, but with the exception of 



