86 ON THE DISTRIBUTION OF HYPNUM SALEBROSUM. 



Schimper's specimens, and in both" cases the later fructification - 

 appears to be due to a higher elevation and colder atmosphere. 

 Hoffmann, in his original description, also mentions spring as the 

 time of fruiting. " H. salebrosum caule reptante, ramis confertis 

 pinnato-depressis, foliis ovatis acutis 3-striatis ; striis oppositis 

 insequalibus capsula e seta laevi cernua operculo conico. Locis 

 saxosis. Vere."— (G. F. Hoffmann, 'Deutschland Mora,' ii., 74). 

 Mr. Lees' specimen, from between Tealby, near Market Rasen, 

 corresponds closely to the var. y . 1, tab. 16, in ' Bryol. Eur.' 



H. Mildeanum is probably a much more widely distributed 

 plant in this country, and often overlooked as a form of rutabulum. 

 In the British Museum there occur specimens in Wilson's her- 

 barium, from Ainsdale Sands, Southport; Bidston Marsh; near 

 Newton Viaduct; Birkdale ; Crosby; Cheshire, F. P. Marrat; 

 St. Andrews, C. Howie; Glasnevin, Dublin, D. Orr ; LeWi 

 Woods, Somersetshire, W. Wilson; Hayle and Falmouth, Corn- 

 JJ^J Curnow; Cork, I. Carroll; and Hurstpierpoint, Mr. 

 \V . Mitten ; all, without exception, labelled " H. salebrosum." Mr. 

 Boswell records it from Oxfordshire ; Mr. Lees from Lincolnshire ; 

 and I have seen it growing at Plymouth, in Devonshire; and 

 Biddenden, in Kent. 



. .. r o — ~- v ■ ■ ■■Mm m ««uic» ui me ivvo pianis, inere 



is little to be added to the excellent descriptions given by Dr. 

 bpruce and Mr. Lees from their own observation and that of M. 

 tfenauld. I may add, however, that in examining under the micro- 

 scope the specimens in the British Museum I found much greater 

 difficulty m distinguishing between forms of H. ylareosum and H. 

 salebwsumthan between the latter and H. .Mildeanum. Apart from 

 the fructifica ion, H salebrosum differs chiefly from H. Mildeanum 

 in the leaves i being distinctly serrate in- the former, the upper edge 



^1 ?6 lT i m ' e b f D ! s T ewhat convex - so M t0 g^ an almost 

 denticulate character to the serration. In H. Mildeanum the leaves 



mlZ^I V n °n 0ne W i 10 has com P^ed the two under the 

 hnoXT C °M d I? 11 f° nf0mid them ^in. As regards the 



CheSS^ Mamt ^ a Very Careful observer ' ™ tea °» the 



Cheshire specimen "inflorescence sometimes synoicous." It 



SoTco! °s T d0Ubtful h ° W far the fact of the -florescence being 

 Tie, nthi Tr S \° r T° 1COllS Sh0uld form a s P eci Ac difference, 

 unlolt^v , dlSt + mC + tlVe characters ^cur. In some species it is 

 SttS^* ' f otl ^rs exceedingly variable. So far as 

 RjiA 110 ? and «»»g ***>* go, H. salebrosum seems to 

 which t L £ V , im A? rCeptlbly ^ H ' 0^-eosum, specimens of 



Dr Spruce L lft4r « ^i - St ° Ckt ° U F ° rGSt ' °° Uected b * 



imbricate tZ Af w ! eXaCtly mterme <^te, having the densely 



Sate ai ex nf fl ^f^T"' with the shortei '- ™™ distinctly 

 M?LXnJlt\ lGaf *? f *-"**»**. The possibility of 

 tins luce MrfoiTr 'T, *¥** *"*' boweve ^ account for 

 dkfci T H m,X eS that he has found tlie *"o plants in one 

 to vel on o^ZT^^ a ?/ egards *W of growth, appears 



owlrds luLZ n, m Wards *-.£****' an<1 <* the other 

 towards lutescens or H. campestre. The latter, which anr^lv B hnnM 



