aestivation

Characteristics and economic importance of family Papilionaceae (Leguminosae)

by

1. Diagnostic features : Mostly herbs, rarely shrubs or trees, often climbing. Leaves alternate, stipulate, simple, or imparipinnately compound. Flowers bisexual, zygomorphic, corolla papilionaceous, aestivation descending- imbricate, posterior petals outermost, stamens 10 or 9, monadelphous or diadelphous, rarely free. Gynoecium monocarpellary, unilocular with marginal placentation. Fruit a legume or pod.  2. Distribution : Includes about 482 … Read more

Classification and characteristics of Superclass: Tetrapoda

by

Tetra-four, podos-feet Primarily terrestrial, some are secondarily aquatic. Two pairs of pentadactyl limbs. Body covered by an exoskeleton of epidermal hair, feathers or scales. Lungs are main respiratory organs. Amphibian may respire by gills, skin or lungs. 3 or 4 chambered heart present. They are divided into 4 classes: Class 2: Amphibia Amphi-dual; bios-life. Dual … Read more