PHYSIOLOGICAL DIFFERENTIATION IN OVERWINTERING INDIVIDUAL OF CERTAIN MUSICAL ORTHOPTERA

Extract

It is well known that many of the crickets and katydids are not as uniform in their mass population as external morphological characters such as the systematist deals with would make them appear. The sequences of the seasons have made possible certain physiological segregations and expressions both in plants and animals. The winter annual among plants is well known, for it is the survival of a plant over the winter in the vegetative condition, usually in the immature rosette stage. As soon as the spring opens these chilled and sluggish plants start into growth and mature their seed in advance of seed sown in the springtime. The Annual Larkspur is a notable example of one of these. Not all plants normally produce winter annuals, for it is evident a plant must possess a high degree of cold resistance.