853 
+ R. acetosella L. 
7 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 lamprosperma Cham.; Syn. M. rivularis auctt.,non Gmel. 
In my list (l. c. p. 73) I have mentioned, that all the Montias 
from the Ferées belong to the form with finely netted and shiny 
seeds, and that this form is more northern than M. minor Gmel. 
I have followed 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 
Fauna et Flora Fenn., vol. 27, 1901, pp. 18—21), that the differences 
between the two species described by G. C. Gmelin in his Flora 
Badensis (1806) are based only upon the vegetative parts of the 
plants, 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 Linneea (1831, p. 565) described 
his new species M. lamprosperma; this author says, that the seeds 
of M. minor and M. rivularis have just the like structure, and places 
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 
Feerées , 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. boreo-rivularis Lindb. fil., both found in 
the Faeröes!. 
Fam. XXXVI. 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 places in the hills the f. pumila Whbg. is the substitute. 
This last form is — after the description — probably the same as 
1 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* 
