6io G liick. —The Species of Utricularia of Great Britain. 
We will now go into the specific differences between U. ochroleuca and 
U. intermedia. At first we will consider the vegetative organs. 
U. ochroleuca usually grows in the shallow water of small pools with 
a boggy bottom (PL XLVII, Figs, i and 2, also the forms B, C, D in the 
table on p. 613). The green water-shoots may grow up to 42 cm. in length. 
With the exception of the underground shoots, which in the first place serve 
as bearers of bladders in U. ochroleuca , the green water-shoots may produce 
isolated bladders ; one or several bladders may be on one shoot (compare 
Fig. 1). On U. intermedia I never found 
bladders in the specimens of continental 
Europe ; but through the kindness of 
Mr. W. H. Burrell I recently obtained 
some dried specimens originating from 
Norfolk, of which a small number show 
water-shoots with isolated bladders; 
and, indeed, in this case 1-4 bladders 
are to be found on one water-shoot 
(PL LXVIII, Fig. 19). Perhaps we 
have here the case of a variety, which 
should be more accurately investigated. 
The green assimilating leaves of 
U. ochroleuca are somewhat variable 
(PL XLVIII, Figs. 16-18); they are 
semicircular to reniform in outline and 
repeatedly furcated in small linear 
terminal segments. Sometimes they 
are divided into a small number of seg- 
ments (as in the case of the specimens 
from Boat of Garten in Scotland and 
also of those from the Black Forest), 
and are therefore similar to the leaves of 
a terminal segment belonging to a Scotch JJ. intermedia (PL XLVIII, Fig. 16) ; 
example from deeper water, from the Loch . , - . . . , . . , 
nan Mathair Etive. x 20. sometimes they are divided into more 
terminal segments (as in the case of 
the specimens from Loch nan Mathair Etive in Scotland and also of those 
from Holland), and remind us of the magnificent leaves of U. minor 
(Pl. XLVIII, Figs. 17 and 18). Consequently U. ochroleuca is sometimes con- 
fused with U. intermedia and sometimes interpreted as a hybrid between 
U. intermedia and U ’. minor ; 1 which interpretation as hybrid cannot well 
be defended. We see, on the one hand, that U. ochroleuca is normally not 
associated with U. intermedia ; on the other hand, we see that in the moors 
1 Compare L. M. Neuman, Utricularia intermedia , Hayne, x U. 7ninor, L. Botaniska Notiser, 
1900, p. 65. 
V 
li 
i a. 1 b. 
Text-figs, i a, b. Terminal leaf-seg- 
ments of Utricularia ochroleiica. Fig. 1 a 
shows a terminal segment belonging to a 
Scotch example taken from shallow water, 
from Boat of Garten, x 20. Fig. 1 b shows 
