ig2 YORKSHIRE NATURALISTS UNION, 



1330. Puccinia saniculse Grev. {Aicidimn. Carm.] . 

 Mid. W. — Bolton Woods ('Nat.', Aug. '81), Harewood 



(F.F., '98). Grass Woods, Grassington (Fl. Skipt.). 

 S.W. — Shireoaks (Lees' FL). Campsall (F.F., '99). 

 N.E.— Staithes (*' Nat.', Ap. '98). Rievaulx (F.F., '03). 

 N.W.— Rokeby (F.F., '03). 

 On Sanicula eiiropcea. 



1331. Puccinia vincae DC. 

 N.E. — Scarboro'. On Vinca minor. 



Puccinia glumapum Eriks. and Henn. 

 N.E. — Scarboro'. Uredospores and teleutospores on 

 Tntictmi vepens. ^cidiospores unknown. 



1332. Puccinia dispopa Eriks. and Henn. 



N.E. — Scarboro'. Uredospores and teleutospores on Bro;««s 

 mollis, ^cidiospores on A nchusa officinalis. This form hitherto 

 unrecorded for Yorkshire. 



1333- Puccinia graminis (Pers. in part). [JScidiuni 

 berberidis. Pers.] . 



S.W.— Saltaire (Tr. ii.). Went Vale ('Nat.', Aug. '81). 

 Roche Abbey Valley ; Anston Crags ; Pontefract (Lees' Fl.). 



Mid W.— Thorner ('Nat.', Aug. '8ij. Church Fenton 

 (Lees' Fl.). Wetherby (J. E. Sutclifife, Bdf.). 



N.E. — Scarboro' (Tr. iv.). Stokesley (Exc. '99). 



This fungus, as understood by Persoon, has now been 

 proved to include several distinct species, mostly through 

 the researches of Eriksson, who has studied the subject 

 thoroughly for many years. Many such are called by him 

 " biological species," that is, species without any morpho- 

 logical differences, but which can only inoculate one particular 

 species of grass or cereal, or at most, a few very closely allied 

 species. In some instances this specialisation has gone so 

 far as to limit some biological species of fungi to a single 

 variety of a species. This interesting specialisation on the part 

 of some of the Uredines, and also other groups of fungi 

 cannot be entered into in detail in this work, nevertheless the 



Trans. Y.N.U., 1904 (pub. 1904) Bot. Series, Vol. 6. 



