ME. C, KNIGUT ON THE STICTEl IN TlIK KEW MUSEUM. 243 



deducted as doubtful natives. In addition a few other species 



have been gathered as strays from garden cultivation. li. cin- 



namomea^ L., found by Mr. Sabine long ago near Pontetract, is 



frequent in gardens, and widely dispersed as a native plant in 



continental Europe. B. liicida, Elirh., found by Mr. Borrer near 



Keswick (Phyt. ii. p. 437), and by Mr. Eecves near Tunbridge 



Wells, is a common North-American rose, also frequent in gardens. 



The same plant has been gathered in a subspontaneous state 



in France and Germany, and is B. laltica^ Eoth (Enum. ii. p. 4G4 ; 



Koch, Syn. p. 444). The subspontaneous Yorkshire and Sussex 



Eoses, mentioned by Mr. Borrer in the ' British Flora,' 3rd edit. 



p. 245, do not appear to be essentially different from U. provin- 



cialisy Ait. ; and the R. arvensis, var. Andersoni, mentioned by 



Smith, ^ Eug. Flora,' ii, p. 398, I believe to be 11. austriaca, 



Crantz. The two latter are both members of the GaUicanw 

 group. 



Notes on the Stictei iu^he Kew Museum. 

 By Chakles Knight, Esq., F.L.S. 



[Head AprU 15, 18G9.] 



Du. KxLA^fDER arranges the Stictei under three genera — Stictina, 

 Sticta, lt»casolia. An examination of these lichens in the Kew 

 collections shows that this distinguished licheuologist, in his 

 ' Synopsis Methodica Lichenum/ has not in every case arranged 

 the species in accordance with his own scheme of classification. 



The essential distinctive characters which separate Stictina 

 from Sticta depend on differences in the colour and structure of 

 the gonidial cells. In the genus Sticta the gonidial layer con- 

 sists of free cells and hyaline filaments; and each cell contains 

 bright green protoplasm. In Stictina, on the other hand, we find 

 in the gonidial layer irregular-shaped cellular "nodules," in the 

 cells of which are imbedded two or more bluish granules (granula 

 gonima). 



Stictina faveoJata Qs}\^ Syn. p. 337). 



The numerous specimens in the Kew Collections, wliether 

 named by Babington or Nylauder, belong to the genus Sticta, 



with the 



St 



fi.atrovirens,^\ot.;' mA another from the Paris Museum ticketed 

 '' Sticta faveoJata :'' these two plants being identical, it would 



