226 



nized. It suggests Evemiopsis TruUa (Ach.) Nyl., and 

 its prostrate habit is more evernioid than cetrarian. 

 Nylander even placed it in the genus Evernia in 1858, and 

 in Parmelia in i860, and its inclusion in this genus must 

 be considered only tentative, as it may find a more 

 logical resting place in the genus Evemiopsis. It is 

 quite clear that its radial structure is doubtful in view of 

 its almost decorticate concave side and 3^et if sections for 

 study are taken in corticate areas the plant is allied here 

 rather than with the strictly dorsiventral Evernias. 



Fi: 



Range of Celraria Richardsonii Hook. 



It is interesting to note that this plant was first dis- 

 covered by J. Ammann in Siberia and sent to Dillenius 

 prior to 1741 as was pointed out by Tuckerman in i860 

 and confirmed by Crombie in 1880. It was therefore 

 figured and described by Dillenius eighty-two years 

 before Hooker gave it his binomial name. Through the 

 kindness of Dr. S. H. Vines of the Oxford Botanic Gardens 

 I am reproducing on page 227 a photograph of the original 

 Dillenian plant. 

 ExsiCCATi: No. 8. Canadian Lich., Macoun. Dome, Yukon, 

 Aug. 15, 1902. 



Cetraria cucullata (Bell.) Ach. 



Synonymy: Lichen cuciiUatus Bellardi, Osserwazione 54. 1788. 

 Lichen cucullata Bell., App. Floram Pedemontanam, Act. 



Acad. Turin 10: 209. 1790-91. 

 Lichen cucullatiis Smith, Act. Soc. Linn. 5: 84. 1791- 

 Cetraria cucullata Ach., Meth. Lich. 293. 1803. 

 Type: In the Bellardi herbarium, R. Instituto Botanico, 



Turin, Italy. 

 Type locality: "montis Cenisii," Italy. 



