The leaf of Nepenthes (Fig. 175) combines three structures and uses.
Among the botanical productions Nepenthes destillatoria, the famous pitcher-plant of the East, deserves mention.
Dr. Hooker shows that the pitcher of Nepenthes is due to a modification of a gland placed at the extremity of the midrib.
Theodore Zwinger, Sprengel, and others have supposed that the nepenthes of Homer was opium.
One of the broad sort, Nepenthes rajah, will hold two quarts of water in its pitcher.
Another, Nepenthes Edwardsiania, has a narrow pitcher twenty inches long; while the plant itself grows to a length of twenty feet.
The wonderful Pitcher-plants, forming the genus Nepenthes of botanists, here reach their greatest development.
Others are surprising without qualification, like Nepenthes, which dangle a water jug at the tip of every leaf.
He also found quantities of a pitcher plant, Nepenthes (which lives mainly on insects caught in its pitchers).
But certain insects have somehow managed to educate their larv to resist the gastric juices of Nepenthes.