616 Gliick . — The Species of Utricularia of Great Britain. 
organs, which become o*5-2*5 mm. long ; the latter are identical witk meta- 
morphic leaves (PL XLVII, Figs. 7 and 8); they are pinnatifid in 3-1 
large and linear segments, which are twisted in a claw-like manner, their 
surface nearly vertical to the rhizoid axis. The apices of the lobes are 
obtuse, furnished with a little spine and densely covered with globose 
papillae. I observed a great many intermediate forms between the ‘ rhizoids ’ 
and the underground shoots. The underground shoot s 2 in Fig. 1 
(PI. XLVII) is originating from a former rhizoid, and the two little segments 
(/, l) are former rhizoid segments. 
The rhizoids of U. intermedia are not very different from those of 
U. ochroleuca , but they have mostly more delicate lateral segments, which 
are without little spines on the apex of the segments. 1 
Propagation and Hibernation. 
Similarly to the other U tricularia species, U. ochroleuca produces also 
in autumn winter-buds, which serve for the vegetative propagation and 
hibernation. I found these in August, but only scantily, in two Scotch 
localities (near Boat of Garten and in the Loch nan Mathair Etive of the 
Rannoch Moor). On the other hand, formerly I was able to study it 
minutely with German specimens. 2 I will only mention the most important 
points here. 
The formation of the buds takes place chiefly in September and 
October, and can occur as well on the green floating shoots as on the under- 
ground shoots. Some intermediate leaves lead over to the development of 
the winter-bud. In comparison to the vegetative leaves the intermediate 
leaves grow smaller and smaller, and the edges show a numerous formation 
of little teeth covered with fasciculated spines. 
The buds themselves are globose, 3-5 mm. thick ; 3 they are similar to 
those of U. intermedia , with a covering of hair, which, however, is not so 
dense as that of U. intermedia. 
In the germination, 4 which commences in May or at the beginning of 
June, the axis-bud expands three to five times its original length, whilst with 
U. intermedia the axis-bud does not experience a secondary prolongation. 
The typical bud-leaves are in the outline semicircular to reniform, and are 
divided similarly to the vegetative leaves, but they have terminal lobes 
greatly shortened and enlarged, of which there may be 7-20. The edge of 
1 Compare H. Gliick, l.c., vol. ii, pp. 73 and 74. 
2 Compare ibid., pp. 125-127. 
3 In land forms the winter-buds are only i*2-2 mm. thick. 
4 The germinating winter-buds are not very rare among the herbarium material. I have seen 
them in Mr. Bennett’s herbarium, originating from the following places : from Ben Lawers ; from 
Moidart (Senn Bowald) ; from Inverness (Loch an Feidh a Maadaith) ; in the herbarium of the 
British Museum from W. Sutherland (Sennie) and from Perthshire (Coninish Valley) ; in the 
herbarium of the Nat. Hist. Museum of Perth from the Loch na Craige. 
