1 60 F. W. C. Areschoug. 



foliorum inferiorum inciso-duplicato-serratis; inflorescentia ramorum breviorum 

 simplici, racemosa, aphylla, illa ramorum longiorum composita, ramis inferioribus 

 axillaribus, racemos vel corymbos gerentibus, foliis floralibus summis haud raro 

 ovatis vel oblongis (in inflorescentia simpliciori); pedicellis longe productis, 

 glandulis sessilibus, rubria munitis; sepalis ovatis, acutis vel rarius lanceolatis, 

 longe acuminatis, subtus virescentibus & pubescen tibus, albo-marginatis, in fructu 

 reflex is; petalis maximis, extus pubesceutibus, albis, late obovatis, in unguem 

 longum attenuafcis; filamentis albis, divaricatis, stylos albo-virescentes longe super- 

 an tibus; germinibus glabris vel in apice pilo uno alterove obsitis; receptaculo 

 glabro; fructu subcylindraceo. 



This species grows on open sunny places, among busbes in the crevices 

 of rocks, or upon stony ground, and is most spread over the east coast of Sweden, 

 between 57° 45' n. lar. and 59° 20' n. lat. It is not to be found on the west 

 coast of Sweden, but is growing in many places on the south coast of Norway, 

 between 58° and 59° n. lat It grows generally near the sea-coast. But, 

 according to the information of Lektor Kindberg, in Östergötland it goes further 

 inland. Arrhenius (1. c. page 26) says that this species aho appears in the 

 northwest of Skåne, but this statement is owing to its being mistaken for a. 

 form of R. fruticosus. Outside the Scandinavian peninsula, R. sulcatus is 

 to be found in Denmaik, on the islands, as well as on the Jutlandic peninsula, 

 and on a large part of the European continent, at least the more western part. 

 It seems, however, to be most common in the mountainous träets of southern 

 Europé. From England 1 have not seen this species. The Scandinavian form 

 seems, in all points, to corréspond with the Continental. 



In the introduetion (page 27), I have expressed the opinion, that R. sul- 

 catus here sprung from R. fruticosus (plicatus), because intermediate 

 forms between these two species are not entirely wanting. The altered opinion, 

 in regard to intermediate forms, to which I have now come, makes it, however, 

 more likriv thai this species immigrated here. As it is found in Denmark 

 and North Germany, ii could easily have come over here. That it is not to 

 be nid with in the most southern part of Sweden, can also be accidental. 

 The intermediate forras between this species and R. fruticosus, which are to 

 be found here, in mountainous träets, for example at Kullen in the northwest 

 ( 'l Skåne (the form growing rhere, Arrhenius refers to his R, affinis), and 

 al Fiskebåcksfcil in Bohuslän, and at many places in Norway, are to be 

 regarded as parallel forms which were produced by R. fruticosus, by the 



