border, where probably only accidentally imported from 
Sweden (with hay for travelling horses?).. On the outer 
western coast rarer. Northwards and in alpine localities only 
the form E. tenuis occurs, whilst a distinctly differentiated 
late flowering form, subsp. eubrevipila, answering to the de- 
scription of the type by Wettstein and Gremli, is well 
represented only in regions with a higher summer-tempera- — 
ture, the south-eastern part of the country and the inner 
regions of the western firths. Wettstein’s species E. tenuis 
should only be considered a subspecies, for, as a rule, no 
limit between the two seasonal forms exists with us. 
8. E. stricta Host. Frequent in Southern Norway, rather con- 
tinuously distributed in the south-eastern part of our country. 
Also near the Trondhjemsfjord, in several places. Seems to 
have immigrated to South-eastern Norway — where it gene-. 
rally prefers dry, sunny localities and shows a more or less 
distinct xerophile adaptation — from Sweden comparatively 
late, in a milder age before the present climate set in, there- 
fore probably in the mild subboreal age of Blytt and Ser- 
nander, preceding the subatlantic age. 
The species very willingly forms hybrids with the common 
E. brevipila. On the whole, these two species are usually 
so mingled together by transitional forms that a distinction 
by the only reliable separating character which is left, viz. 
the glandular hairs, generally becomes quite unnatural and 
arbitrary (the glandular hairs being present in any number, 
varying from a great many to none at all). In very many. 
cases it seems most natural to consider the plant in question 
which is without the glandular hairs as a form of E. brevi-. 
pila. If one admits that this latter plant may be without 
the glandular hairs — H. Lindberg, for instance, has di- 
stributed an E. brevipila forma eglandulosa — the rest of 
the distinguishing marks between this species and E. stricta 
prove quite unreliable and indicate that this latter species 
may only be a xerophile form of the former. 
In the inner valleys early flowering forms, answering to 
the Swedish E. suecica Wettst., are found, but only rarely 
and less differentiated than in Sweden. Such forms do not 
occur in the south-eastern region of distribution, where the 
plant is much more common. This seems to show that the 
= 
E. Jorgensen. 
