Additions and Corrections. 



Piige 22. States that It. Aresehougii is found exelusively in Norway. In page 107, 



however. it is stat ed, that afterwards it has also been met with in Sweden, 

 viz, in Skåne. 

 Pages 26 — 27. Furt her examinations have led me to the opinion that R. suberectus arose 



in central Asia, from some form of R. corylifolius. 

 Pagi 27. Since the printing of the introduktion, my opinion in regard to iutermediatc 



forms has somewhat changed. I have also come to the conclusion, that K. 

 insularis and fissus bad not tbeir origin ou the Scandinavian peninsula, 

 hut immigrated hither; compare pages 146, 1(>8. 



„ 28. For me same reason I consider now, that R. cordifoiias did not originate 



in our couutry, hut immigrated hither, and that R. relatus here arose from 

 R. fruticosus (R. plicatus). 



,, „ The opinion that a new form can arise gradually, has undergone some 



modification, compare page 111. It is this altered view, that has led meto 

 change my opinion regarding the origin of R. sulcatus, fissus and cordi- 

 folius, in this couutry. 



,. •!'_'. I have set forth I{. pyramidalis and villicaulis as very nearly related 



to R. Lindebergii, insularis and polyanthemos. Afterwards I have, 

 bowever, come to the conclusion that they belong to another groups, viz, 1!. 

 pyramidalis, perhaps, to Vestiti, and It. villicaulis to Cordifolii. 



„ 35. II. fissus, sulcatus and cordifolius have been referrcd to the species 



wbich have arisen in this country. Further observations have led me to the 

 opinion, that they immigrated from the continent and. therefore, are to be 

 referréd to A, g, 2. 



„ 38. The form of It. arcticus which bas been mentioned arid which is cultivated 



in the Hotanical gardens in Lund, has white fiowers and should, perhaps, 

 more properly be referréd to R. saxatilis or triflorus. 



„ 43. It. Areschougii was found by Dr. II. Nilsson in many places on the dried 



beach of Ringsjön, in central Skåne (Juue 1885). Afterwards, when I 

 bad the opportunity of examining this extraordinary form alive and in flower 

 (.Inne 1886), I was aide in one and another point to correct my description 

 13 & 44), which was made from a small numbei- of dried speeimeiis, 

 collected in Norway, liy Mr. A. Blytt. 



The conditions under which this form grows at Ringsjön, bäring alreadj 

 d noticed (pågs 107 & 108), I shall here only add, that it also appears 

 iu one and another place on the edges of woods bounding the beach. It 

 grow- mixed with It. cassius and pseudo-idaeus, in several places, but 

 every where keeps itscll', as regarde the shape of the flowers, well distinguish- 



