853 



f R. acetosella L. 

 t R. crispus L. 



138. R. domesticus Hartm. 



R. domesticus Hartm. X obtusifolius L. 



139. R. obtusifolius L., f. agrestis Fr. 



Fam. XXXV. PORTULACACEAE. 



140. Montia lampposperma Cham.; Syn. M.rivularis auctt.,nonGmel. 

 In my list (I. c. p. 73) I have mentioned, that all the Montias 



from the Færoes belong to the form with finely netted and shiny 

 seeds, and that this form is more northern than M. minor Gmel. 

 I have foUowed most of the botanists in naming this form »Montia 

 rivularis Gmel.«, but this name is not correct according to the opi- 

 nion of H. Lindberg. He has pointed out (Medd. af Soc. pro 

 F'auna et Flora Fenn., vol. 27, 1901, pp. 18—21), that the differences 

 between the tw^o species described by G. G. G mel in in his Flora 

 Badensis (1806) are based only upon the vegetative parts of the 

 piants, and the characters taken from the testa of the seeds are 

 not at all mentioned. Upon this last character Ad. de Chamisso 

 has first laid emphasis, when he in Linnæa (1831, p. 565) described 

 his new species M. lamprospenna; this author says, that the seeds 

 of M. minor and M. rwiilaris have just the like structure, and piaces 

 his new species as a contrast to them. This view is after H. Lind- 

 berg — with the opinion of whom I agree — the correct one, and 

 consequently the Montia which occurs in Greenland, Iceland, the 

 Færoes, Scandinavia etc. must bear the name M. lamprosperma Cham. 

 It consists of a smaller (annual?) form — the typical — and a larger 

 perennial water-form : var. horeo-rivularis Lindb. fd., both found in 

 the Færoes^. 



Fam. XXXVL RANUNCULACEAE. 



141. Caltha palustris L., and var. radicans (Forst.). 



142. Ranunculus acer L., and f. pumila (Whbg.). 



This species varies very much after its much varying habitats. 

 In luxuriant rock-ledges a tall and robust form with the stem pa- 

 tently stiff-hairy beneath (f. velutina Lindbl.) is met with. In bare 

 gravelly piaces in the hills the f. pumila Whbg. is the substitute. 

 This last form is — after the description — probably the same as 



^ The more southern species, M. minor Gmel., with smaller, tuberculate-netted, 

 somewhat opaque seed-testa has a parallel development, the water form of which 

 must be named M. minor Gmel., var. rivularis (Gmel.) Lindb. fil. 



55* 



