Question

Which inflorescence has biparous cyme ending in uniparous cymes?
A) Cyathium
B) Verticillaster
C) Hypanthodium
D) Strobile

Answer 1

Hint:An inflorescence is a group or cluster of flowers clustered on a stem consisting of a main branch or a complicated branch arrangement. Morphologically, it is the modified part of the seedling shoot where flowers are produced. Modifications can include the duration and design of the internals and the phyllotaxis, as well as variations in proportion, compression, swelling, adnation, connotation and reduction of the main and secondary axes.

Complete answer:
Verticillaster is a cluster of sessile or subsessile flowers borne on a biparous cyme (dichasial) that ends in a uniparous cyme (monochasial) in the shape of a condensed whorl on either side of the node. It's a form of cymose inflorescence. Tulsi is an example.
This type of inflorescence is found in the labiate\lamiaceae family.
In this sort of inflorescence, the leaves on the stem are arranged in the opposite direction. Any leaf inflorescence grows from the axil. The lateral axis emerges from the main axis on which the flower is found. Now lateral branches grow from these branches, which also carry flowers. Each dichasial cyme switches to a monochasial(scorpioid)cyme in this form of inflorescence.
Uniparous or single-chasing cyme:-A single lateral branch emerges from an old flower peduncle, which ends in a flower. The lateral branch also ends in the vine. Ex-Tecoma, Ranunculus, Heliotropium
Biparous or said cyme:-The main axis ends in the vine. A pair of lateral branches are produced below the terminal flower, which ends in a flower. The method has been replicated many times. Ex-Ixor, Saponaria, Dianthus, Jasmine.
Cyathium appears like a flower. A cup-shaped involucre produced by bracts contains a single female flower and a number of male flowers. Each male flower is represented by a single stamen, while the female flower is represented by a single pistil. It's a form of cymose inflorescence. The illustration is that of Poinsettia.
Hypanthodium is a fleshy receptacle that forms a hollow cavity with an apical opening called ostiole. The flowers are produced on the inner wall of the hollow cavity. It's a form of cymose inflorescence. Example:Banyan

Thus the correct answer is option(B).

Note:An Inflorescence is a set or grouping of flowers on a single plant.This is the
The stalk of the inflorescence is known as the peduncle and the main axis of the inflorescence.Inflorescence flowers are called rachis. Each flower can be attached to it
The primary axis is called the pedicel, and the flowers are called as a pedicellate