This remarkable genus is technically distinguished from Utricularia, as
I hear from Prof. Oliver, by having a five-partite calyx. Species are
found in several parts of the world, and are said to be herbae annuae
paludosae.
Genlisea ornata (Brazil). This species has been described and figured
by Dr. Warming,* who states that it bears two kinds of leaves, called
by him spathulate and utriculiferous. The latter include cavities; and
as these differ much from the bladders of the foregoing species, it
will be convenient to speak of them as utricles. The accompanying
figure (fig. 29) of one of the utriculiferous leaves, about thrice
enlarged, will illustrate the following description by my son, which
agrees in all essential points with that given by Dr. Warming. The
utricle (b) is formed by a slight enlargement of the narrow blade of
the leaf. A hollow neck (n), no less than fifteen times as long as the
utricle itself, forms a passage from the transverse slit-like orifice
(o) into the cavity of the utricle. A utricle which measured 1/36 of an
inch (.705 mm.,) in its longer diameter had a neck 15/36 (10.583 mm.)
in length, and 1/100 of an inch (.254 mm.) in breadth. On each side of
the orifice there is a long spiral arm or tube (a); the structure of
which will be best understood by the following illustration. Take a
narrow ribbon and wind it spirally round a thin cylinder, so that the
edges come into contact along its whole length; then pinch up the two
edges so as to form a little crest, which will of course wind spirally
* Bidrag til Kundskaben om Lentibulariaceae, Copenhagen 1874. [page
447]
round the cylinder like a thread round a screw. If the cylinder is now
removed, we shall have a tube like one of the spiral arms. The two
projecting edges are not actually united, and a needle can be pushed in
easily between them. They are indeed in many places a little separated,
forming narrow entrances into the tube; but this may be the result of
the drying of the specimens. The lamina of which the tube is formed
seems to be a lateral prolongation of the lip of the orifice; and the
spiral line between the two projecting edges is continuous with the
corner of the orifice. If a fine bristle is pushed down one of the
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