ascidium

Pitch′er-plant, a plant with leaves shaped like a pitcher or ascidium—Nepenthes, &c.—Pitchers have ears, there may be listeners.

Ascidium, a pitcher-shaped body, like leaves of Sarracenia.

It is not in all cases easy to trace the origin and true nature of the ascidium, as the venation is sometimes obscure.

It appeared from some transitional forms that the adventitious leaflet, just mentioned, was due to the exaggerated development of this gland, but no clue was afforded as to the origin of the ascidium.

Interrupted leaves, with an ascidium on a naked prolongation of the midvein, are by no means limited to the Croton varieties.