Peristome Definition

Peristome Sentence Examples

• The mouth of the pitcher has a corrugated rim (peristome) formed by incurving of the margin, the convex surface of which is firm and shining.

• Insects are attracted to the mouth of the pitcher by a series of glands, yielding a sweet excretion, which occurs on the stem and also on the leaf from the base of the leaf-stalk to the lid and peristome.

• On the upper face of the hydranth the crown of tentacles (t) surrounds the peristome, from which rises the conical hypostome, bearing the mouth at its extremity.

• They surround a region which is termed the peristome, and which contains in the centre the blastopore, which becomes the adult mouth.

• The peristome is relatively small and the mouth is generally raised on a projecting spout or hypostome.