(4)

China rose, mustard, brinjal, potato, onion, and tulip are the plants that have a superior ovary, whereas in guava and cucumber, the ovary is inferior.

(4)

Axile placentation occurs in syncarpous pistils. The ovary is partitioned into two or more chambers. Placentae occur in the central region where the septa meet so that an axile column bearing ovules is formed, e.g., shoe flower (pentalocular), lemon (multilocular), etc.

(4)

The flowers of Family Papilionaceae have butterfly-shaped corolla (papilionaceous corolla). The posterior or outermost petal is the largest and is called the standard or vexillum, two lateral petals are similar and generally clawed, called wings or alae, and the two anterior petals called keel are fused, enclosing stamens and carpels. This type of petal arrangement is found in bean, gram, pea, Indigofera, etc.

(2)

Aestivation is the arrangement of accessory floral organs (sepals or petals) in relation to one another in the floral bud. It may be of open, valvate, twisted, or imbricate type. In imbricate aestivation, there is an irregular overlapping of petals or sepals by one another. Cassia, Gulmohar, etc., show imbricate aestivation.