NOTE UPON HYPNUM SALEBROSUM. 359 



Dalz.), is interesting as furnishing the first unmistakable 

 instance of dedoublement I have found. The flowers are those 

 of TJichopsis (C 3 + 3, P 6, st 6 + 6, G 6) ; but the anti- 

 petalous stamens are usually re^Dlaced each by a pair. This is 

 not constant, even for the same flower, so that the number of 

 stamens varies from twelve to eighteen. Hence it will stand in 

 the genus where B. H. have j)laced it. Stipules are very frequent 

 m this group, but it is difficult to be sure of their presence, as they are 

 almost always deciduous, and can only be found on growing shoots 

 — even on these sometimes with difficulty. Their presence varies 

 from species to species in such natural genera as (Eu-) Miniusops 

 and Sideroxylun, as noticed by Baker. 



NOTE UPON HYPNUM SALEBROSUM, Hoffm., AND 



ITS BKITISH DISTEIBUTION. 



By F. Arnold Lees, F.L.S. 



As bearing upon the inference to be drawn from Mr. Spruce's 

 remark (p. 307) that there are " at least two reliable" stations in 

 Britain for H. salebrosum, Hoffm., I can confirm the refutation of 

 Mr. G. Davies' doubts as to the correct determination of the name 

 by Mr. Spruce. I know three wide-apart stations additional to 

 those mentioned in Mr. Spruce's paper ; possibly unknown to him, 

 since, during his long absence from England, British bryology has 

 acquired many new votaries. Further, I may assert that the 

 following particulars amply corroborate Mr. Spruce's prediction as 

 to a careful search revealing a wider distribution in Britain. 



I found B. salebrosum, Hoffm., in 1876, growing on fallen, 

 rottmg bark and sticks, by a rivulet, running eastward, at the 

 lower end of Ledsham Park, in the AVest Piiding of York. It was 

 gathered as B. riUahulum, the yellower-green of the foliage being 

 set down by me — then just beginning moss study — as due to 

 growth in shade. The differences so felicitously summed up by 

 Mr. Spruce, however, afterwards revealed the species. 



Again, in December, 1877, I gathered the same moss from off 

 decaying tree-stumps, and off' a bank composed mainly of rotten 

 vegetable matter, by the roadside a mile out of Market Easen 

 going towards Tealby. It was fruiting only sparingly where first 

 found, but later I detected it in several other thickets in the same 

 district, Claxby Wood, Wickenby Holt, &c. The Lincolnshire 

 moss, pronounced by Mr. H. Boswell, of Oxford, — surely no more 

 careful authority could be desired by Mr. Davies, — to be the 

 veritable B. salebrosum of Hoffmeister, was akcai/s found by me 

 upon decayed bark, humus, rotten fir-needles, &c., in shade, exactly 

 as Eenauld, quoted by Spruce, asserts it to occur in the Fyienees. 

 Singular to say, it is not the only sub-montane and Pyrenean moss 

 (occurring also near Castle Howard, yet almost unknown elsewhere 

 in England) which I have found upon the extensively fir-wooded 

 greensand tract near Easen, for Eurhyiichium striatulum, Spruce 

 (for instance), grows not two miles from where I first noticed 

 B. salebrosum. 



