In this article we will discuss about the description of pea plant with diagram.
Pea plant is a common annual herb grown for its seeds in the winter. It is a fragile plant that uses tendrils to climb. The roots develop distinctive nodules as a result of nitrogen-fixing bacterial infection.
Pinnately complex (imparipinnate) leaves have modified terminal leaflets that resemble tendrils. The leaf-base is swollen, forming pulvinus. A pair of foliaceous stipules is present. Flowers are lateral, solitary or in racemes.
Figure 1: Pea Description
They are fully developed, irregular, zygomorphic, bisexual, and slightly perigynous. The calyx is made up of five joined sepals. The corolla is papilionaceous, with five free petals. The standard or vexillum is the largest and outermost petal, two lateral petals are wings or alae, and the innermost two, called keel or carina, join to form a boat-shaped body. Aestivation is a vexillary.
Androecium is made up of ten stamens, nine of which are joined together to form a bundle and one of which is free, diadelphous. Gynoecium is monocarpellary, one-chambered, and has two series of ovules. Placentation is insignificant. The ovary is lengthy and superior.
Fruit is a legume that divides along both sutures. The seeds are exalbuminous, and the germination process is hypogeal. The sporophyte is the plant; the gametophytes, represented by the pollen tube and embryo-sac, are extremely reduced and reliant on the sporophyte.