290 GOTE TURESSON 
| | 7 
| | ‘ee | 
| Field no. | 1 152 3 DEAE 
| | | | 
17820, SET AR) re tal AG 
| 1921 17. x. 245119 | 419 14951 
1.5.1922 2) 18 23 16 17202.) 721 
The region south of Stenshuvud is a sandy beach with scantily 
wooded epilittoral bluffs, rising about 20 m. List no. 22, collected 1 
km. north of Vik, comes from this region. This series does not con- 
tain any plant that attains the greath leaf width of the broadest Stens- 
huvud plants; it includes, on the contrary, a few individuals’ which are 
more narrow-leaved than any of the plants contained in the Stenshuvud 
collection. A small area of much fissured rock 1 km. south of Vik 
has been found to harbour a H. umbellatum chasmophyte which in 
culture (list no. 21) is found to be almost prostrate with rather broad 
leaves, although of less width than the broader leaved Stenshuvud 
plants. Farther to the south, between Baskemölla and Cimbrishamn 
and about 9 kilometres from Stenshuvud, closed dunes and beach flats 
covered with a low vegetation, mainly composed of an often continous 
turf of mosses and lichens, begin to appear. The prostrate dune variety 
from the closed dunes and arenacious fields north of Kivik reappears 
here in its most typical form. List no. 20 refers to a collection of this 
form brought home in 1920 from the locality in question. It is not 
to be distinguished from the variety found north of Kivik. It is there- 
fore a natural assumption that the indistinct A. umbellatum forms 
found on the coast strip between Stenshuvud and this point represent 
mongrels between the erect, broad-leaved Stenshuvud variety and the 
prostrate dune variety of the southern centre of distribution. 
The closed dunes and the beach flats continue southwards. List 
no. 19 refers to collection made at Skillinge. This series is made 
up of the typical prostrate dune form. At a point situated about 5 
kilometres to the south of Skillinge the large drift-sand region of 
Sandhammaren begins. This region was visited in 1919 and seeds from 
a number of plants of H. umbellatum growing in the drifting sand were 
brought home. A series of individuals raised from these seeds is 
tabulated in table 19. Important differences between these plants and 
the prostrate dune variety are at once seen. The variation in the 
magnitude of the angle of the stem is rather large, but the extreme 
prostrateness characteristic of the prostrate dune variety is not attained 
in any of the plants. The Sandhammar form shows greater similarity 
