ON SOME BRITISH VIOLA FORMS. 67 



plantae gestatricis pulvinar celltilosum efficientibus, constituta; 

 parte altera (in qua fructus evoluti) libera, plana, oblonga, sub- 

 rotundata aut plus minusve lobata, cellulis angulatis areolata, 

 avenia; fructus ut in Nitophyllo sed soris totam paginain lami- 

 narum occupantibus. 



G. Buffhami, species unica. 



Hab. In littore prope Deal in Nitophyllo lacerato inter limites 

 aestus derelicto. 



Explanation of Plate 319.— Figs. 1-8 and 10—14, Gonimophyllum Buff- 

 hand. Fig. 9, NitophyUum laceratum. 1 & 2, Portions of the frond of Nito- 

 phyUum laceratum with GonimophyUum Buffhami parasitic on them, natural 

 size ; 3, portion of the surface of a basal cushion of G. Buffhami, x 50 ; 4 & 5, 

 vertical section through basal cushion in two stages of development, x 50; 

 6, vertical section through procarp, X 50 ; 7, frondlet with cystocarps, 

 slightly magnified ; 8, transverse section of same, x 50 ; 9, transverse section 

 through cystocarp of Nitoplujllum laceratum, showing elongated cells from which 

 the nucleus arises, x 50; 10, tetrasporic leaflet of GonimophyUum, slightly 

 magnified; 11, portion of same, x 50; 12, antheridio leaflet, slightly magni- 

 fied ; 13, portion of same, x 50 ; 14, transverse section through same, x 100. 



ON SOME BRITISH VIOLA FORMS. 



By William H. Beeby. 



Since my previous paper on this subject (Jonrn. Bot. 1889, 

 p. 226), attention has been given to the hirta-odorata section, and 

 I now propose to offer some remarks on this group. Although a 

 good many forms have been cultivated, the result has been less 

 interesting than was anticipated, the most important feature being 

 the determination of the plant hitherto known as M Viola sciaphila 

 Koch?" It seems probable that our British F. hirta is a more 

 variable plant than that of either Germany or Scandinavia; and 

 although several forms have been thought to differ from F. hirta in 

 the direction of V. col Una, &c, I have not yet been able to separate 

 them satisfactorily. 



Viola odorata L. — A Surrey plant, gathered by the Rev. E. S. 

 Marshall, is reported on by Prof. Wiesbaur as being apparently 

 V. tenerrima Wiesb. Mr. Marshall's plant differs from ordinary 

 odorata in having more rounded and very thin leaves. Nyman 

 places V. tenerrima as a variety of V. pennixta, which is evidently 

 an error. 



Var. alba Auct. — As has been pointed out already by Mr. 

 Daydon Jackson, F. alba Besser is a distinct species, and not our 

 white flowered variety of the sweet violet. It is not known as a 

 British plant, nor does it seem very probable that it will be found 



as a native. 



V. odorata is a very variable species with us ; some of its forms 

 or states are only doubtfully separable from F. multicaulis Jord. 



Whether the latter is really distinct or not seems to me very 



uncertain, 



f2 



