1920-21.] BOTANICAL SOCIETY OF EDINBURGH 71 



1887-1889 ; at one time lecturer on Materia Medica in the 

 Royal College of Surgeons ; a member of the Scottish 

 Alpine Botanical Clul:) : and an enthusiastic student of the 

 flora of Scotland. 



EXPLANATION OF PLATE L 



1. Inflorescence, x^. 



2. Underside of leal', x 2. 



3. Hair on underside of leaf, liiylily magnified. 



4. Longitndinal section of flower bnd. 



5. Ovary, x 3. 



6. Cross-section of ovary, x 4. 



7. A staminal stipe opened up, x 3. 



8. Stamen. 



Pyrola rotundifolia, Linn., in Caithness, with Notes 

 ON the Genus. B}^ Arthur Bennett, A.L.S. 



(Read lOtli December 1920.) 



In June 1920 Mr. Bain sent me a specimen of a Pyrola 

 remarking that it seemed different from the P. media of 

 the Wick river banks. It was in poor condition, but I at 

 once thought it rotundifolia, writing Mr. Bain so with 

 a query. In a week he sent me G specimens, and 6 of 

 media, all in splendid order. There w^as now no doubt it 

 was not media, but the colour of the flowers — greenish-white 

 with green veins — suggested P. chloranfJia, though the calyx 

 segments and anther cells denied this. All other rotundi- 

 folia I had gathered (and that many) were white-flow^ered, 

 and all the books say white. Colonel Johnston writes me 

 that the Orkney plant has white flowers. On referring to the 

 Scandinavian Floras one finds Si v SiW chlor a ntho ides, ^orvlin 

 (Fl. Kareliae Onegensis, ex Faun. Flor. Fenn. Notiser, xiii, 

 1871-4, p. 160) and a f. chloranthiflora, Noto in herb. = var. 

 pumila, A. Bl. (Norges Flora, 1906, p. 550) (not of Hornem., 

 which is P. grandijiora, Radius, and has smaller leaves, 

 and a greenish flower, etc.). The forma occurs in Russian 

 Lapland (Lapponia ponojensis), c. 67"^ N. lat., and in the 

 province Kuusamo, and also at Seida ad Tenojoki in 

 E. Finmark, Norway, the type being found in the whole of 



