Gluck . — The Species of Utricularia of Great Britain. 611 
of Switzerland U. intermedia and U. minor are often to be found together 
and flowering at the same time; but in spite of this U. ochroleuca is never 
found in Switzerland. The most marked differences are illustrated by the 
terminal lobes of the leaves (PL XLVIII, Figs. 16-19). In U. ochroleuca 
the terminal lobes gradually taper into a point and bear a small spine 
(see PI. XLVIII, Figs. 16-18, and Text-figs. 1 a, b ) ; but in U. intermedia 
the terminal lobes are more or less obtuse and bear also a small spine 
(see PI. XLVIII, Fig. 19, and Text-figs. 2 a-c ). In U. ochroleuca the 
Text-figs. 2 a-d. Terminal leaf - segments of Utricularia intermedia. Fig. 2 a shows 
a terminal segment belonging to an example from Switzerland (Wallisellen near Zurich), which was 
growing in shallow water, x io. Fig. 2 b shows a terminal segment belonging to an example from 
Norfolk. The leaf-apex is more acute than in Fig. 2 a. x 20. Fig. 2 c shows a terminal segment 
belonging to an example from Scotland (Perthshire). Fig. 2 d shows a terminal segment belonging 
to an intermediate leaf originating from Norfolk (Barton Turf), x 20. 
terminal lobes on each side are furnished with 1-6 little spines. In 
U. intermedia the terminal lobes on each side are furnished with from 
2-10 spines. In U, ochroleuca the little spines are placed in very little 
and small teeth, but in U. intermedia the little spines are placed almost 
directly on the leaf-edges. In U. ochroleuca the little spines are often in 
pairs, but in U. intermedia they are mostly isolated. 
It is also not well possible to confuse the typical water-leaves of 
U. ochroleuca with those of U. intermedia ; they exist through the whole 
T-t 2 
