Question

Involucre forms a cup around the inflorescence of?
A. Euphorbia
B. Composite
C. Fig
D. Cobra plant

Answer 1

A group or cluster of flowers formed on a stem made of a primary branch or a sophisticated arrangement of branches is known as an inflorescence. It is the modified section of the seed plant's stalk where flowers are generated morphologically. A plant's reproductive part that bears a cluster of flowers in a certain arrangement is also known as an inflorescence. Simple (single) or complex (many) inflorescences exist (panicle).

Complete explanation:
Option A: Cyathium has the appearance of a solitary flower. Bracts produce a cup-shaped involucre that encloses a single female bloom and several male blooms. A single stamen represents each male flower, whereas a single pistil represents each female blossom. It's a cymose inflorescence of some sort. Poinsettia, for example (Euphorbia pulcherrima).
So, option A is correct.
Option B: The capitulum, or head, has a large number of sessile and tiny florets. The primary axis flattens out and is referred to as a receptacle. It's a racemose inflorescence of some sort. Composites and sunflowers are two examples.
So, option B is incorrect.
Option C: Hypanthodium is a fleshy receptacle that forms a hollow chamber with an ostiole at the apex. The blooms grow on the inside of the hollow cavity's inner wall. It's a cymose inflorescence of some sort. Fig is one example.
So, option C is incorrect.
Option D: Pitcher plant is also known as the cobra plant.
So, option d is incorrect.

Hence, Option A is the correct answer.

Note:
Flowers can appear as a single bloom or as a bunch on a plant. The inflorescence is described as a cluster of flowers arranged on a floral axis. There are two forms of inflorescence: Racemose and Cymose. The arrangement of flowers on a main axis (peduncle) and the period of blossoming are used to classify it (determinate and indeterminate). It has a direct impact on a plant's reproductive performance by strategically placing blooms in space and time.