The valve is attached on all sides to the bladder, excepting by its posterior margin, which is very thin, and rests on a collar or rim, which dips deeply into the bladder. The valve can only open inward;
Fig. 9.—Utricularia neglecta.—Branch with the divided leaves bearing bladders; about twice enlarged.
there are on its surface numerous glands, which have the power of absorption, but are not known to secrete.
The whole inner surface of the bladder is covered with a serried mass of processes, consisting each of four divergent arms, whence they
Fig. 10.—Utricularia neglecta.—Bladder, much enlarged.
are called quadrifid processes. Each arm generally contains a minute, faintly-brown particle, either rounded or elongated, which shows incessant Brownian movements.
Whenever found in stagnant water the bladders swarm with in-
