SHORT NOTES 427 



41 diagrams, by K. Morgan; 20 photographs of trees and 16 of 

 tree-stems, by Henry Irving ; 7 botanical diagrams, by Miss M. 0. 

 Mitchell ; 17 water-colour drawings of cryptogams and other plants^ 

 by Highley ; 4 sheets of water-colour drawings of fun^i, by W g' 

 Smith. o J • . 



The following additions have been made by purchase to the 

 British Herbarium :— 40 North EngUsh lichens, by Johnson; 54 

 hchen-types, by Crombie ; 60 CharacecB, by Groves ; 314 slides of 

 fresh-water alg^, by West ; 250 Irish hepatics, by McArdle • 

 25 algae, by Holmes. 



SHORT NOTES. 



New Variety of Fontinalis antipyretica L. — During the 

 drought of the summer of 1900, when the little river Ouse about 

 a mile and a half above Lewes was running very low, I noticed 

 several long floating masses of a Fontinalh growing on the hard 

 chalk forming the bed of the river, which has been diverted into an 

 artificial channel at this point. The short rather distant concave 

 leaves suggested a robust form of F. squamosa, but the slightly 

 triquetrous points of the growing shoots and general habit Indi- 

 cated it as a form of F. antipyretica L. I was, however, unable to 

 identify it with any of the described varieties. On my referrino- 

 the matter to Mr. H. N. Dixon, he told me that he had found the 

 same form growing in a canal near Northampton; and M. J. Car- 

 dot, to whom I also referred it, said that he had in his herbarium 

 an identical form from the Thames. The latter also kindly referred 

 me to his Monorjrajjhie ties Fontinalacees, p. 52, where he speaks of 

 the Thames plant as "a specimen of the forma ^////)/sa " ; but he 

 adds m his letter that a distinct variety might be made of the 

 present plant, "characterized by the soft, shortly oval scarcely 

 carinate leaves with shorter cells"; and I gather from his letter 

 that by these characters the present plant may be distinguished not 

 only from the type, but from the ordinary forms of M. Cardot's forma 

 diffusa and the var. laxa Milde, to which he is inclined to refer his 

 forma diffusa. The description of the var. laxa Milde given by 

 Limpricht {Die Laubmoose, p. 655) must relate to a very different 

 form from the present plant, as he speaks of it as a smaller more 

 slender form with widely decurrent leaves, which are orange' alono- 

 the base, and have numerous auricular cells— features which are bv 

 no means characteristic of the present plant. 



Fontinalis antipyretica L. var. nov. cymbifolia. Robust with 

 long floating stems, blackish below, hardly shining, with the tri- 

 quetrous arrangement of the leaves of the type very indistinct, and 

 only visible m the tips of the growing shoots. Leaves soft, rather 

 distant, shorter than in the type, oval, concave, not or very fainthi 

 carinate, usually distinctly serrate at the obtuse points, with no 

 distinguishable auricles, margins erect ; cells wider (to 0-025 mm ) 

 and much shorter than in the type, only three to four times as lon'o- 

 as broad m the upper part of the leaf, where they are rhomboidal 



