Question

Gynobasic style is a feature of
A. Labiatae
B. Umbelliferae
C. Solanaceae
D. Papilionaceae

Answer 1

Hint: Gynobasic style is the style of the flower which arises from parts other than the apical part of the ovary. The appearance of the style is related to the infolding of the ovary wall.

Complete answer:
Gynobasic style is when the style originates from the mid basal part of the ovary. The style arises from a central depressed part or cavity of the ovary. It is seen in Salvia, Ocimum. Gynobasic style is the feature of the Labiatae family or mint family.
The gynobasic style can be of two types:
1. The style may be inserted laterally at the base of a syncarpous ovary.
2. The style may arise from the center of an apocarpous ovary.

Additional Information:
1. Features of family Labiatae are as follows:
2. They contain mostly aromatic herbs, shrubs, and few trees. They possess the taproot system.
3. Stems are herbaceous and erect.
4. Leaf phyllotaxy is the opposite. Leaves are simple, decussate, exstipulate.
5. They possess special glands that secrete volatile oils.
6. The inflorescence is a verticillaster type.
7. The flower is bisexual, irregular, zygomorphic, and hypogynous.
8. The calyx is gamosepalous.
9. Androecium epipetalous.
10. The gynoecium is bicarpellary, a syncarpous, ovary is superior and bilocular.
11. Axile placentation is seen and fruits are schizocarpic and seeds are non-endospermic.
12. Flower showing similarity is different parts of each series in size, shape, color, etc is known as a regular flower.
13. Flowers showing dissimilarity are different parts of each series in size, shape, color, etc is known as an irregular flower.
14. The longest style is present in maize.
15. Based on origin style can be further divided into terminal and lateral style.
16. Terminal style arises from the tip of the ovary.
17. Lateral style arises from the side of the ovary.

So, the correct answer is, ‘ Gynobasic style is a feature of Labiatae family’

Note: Gynobasic style is also seen in Chrysobalanaceae, Rhabdodendraceae, and Lamiaceae. The style in Chrysobalanaceae and Rhabdo Dendraceae is inserted laterally at the base of the ovary and the style in Lamiaceae or Labiatae arises from the center of an apocarpous ovary.