The Scottish Naturalist. 



*59 



Before concluding with Skye, it may be noticed that both Mr 

 Duff and myself were struck by the unusual breadth and short- 

 ness of the fronds of Polypodium vulgare, growing on walls by 

 the roadside, and by the unusual breadth of their pinnae. 



We now proceed to give lists of some of the cryptogamic 

 plants noticed in Mull. It is almost unnecessary to remark 

 that lists made during a visit of a few days cannot pretend 

 to anything like completeness ; and the object in publishing 

 them is simply to show in what "lines" the cryptogamic flora 

 runs, and what perhaps may be expected from a more exhaus- 

 tive investigation. 



Ferns and their Billies. 



Hymenophyllum unilaterale Willd. ( = Wilson i Hook.) Com- 

 mon. H. tunbridgense occurs, but we did not see it. 

 Pteris aquilina P. 

 Lomaria spicant Desv. 

 Asplenium trichomanes L. 



ii adiantum-nigrum L. Common on walls, 



ii filix-fcemina Bernh. 



Cystopteris fragilis Bernh. 

 Aspidium aculeatum Sw. 



Nephrodium filix-mas Rich. In addition to the ordinary form, 

 a curious dwarf and very rigid form was observed at low alti- 

 tudes. In some plants the fronds were only seven or eight 

 inches Ions;, and vet with abundant fructification. We saw the 

 same form in Skye, but at a higher altitude. 

 Nephrodium spinulosum Desv. 

 M dilatatum Desv. 



ii aemulum Baker. Very local but luxuriant. 



ii oreopteris Desv. 



Polypodium vulgare L. 



-i phegopteris L. 



n dryopteris P. 



Equisetum arvense L. 



H sylvaticum L. 

 ii palustre L. 

 ii limosum P. 

 Pycopodium selago P. 

 Isoetes lacustris P. Very local or rare. 



ii echinospora Dur. Very local. 

 Mr Ross informed us that, in addition to these, Asplenium 



