Question

The spike of spikelets inflorescences commonly occurs in
a. Cruciferae
b. Papilionaceae
c. Poaceae
d. Solanaceae

Answer 1

Hint: Inflorescence is described as a cluster of flowers present on a branch or a system of branches. Further, an inflorescence is categorized based on the arrangement of the flowers on the central axis is called a peduncle, and its timing of flowering, which may be determinate and indeterminate.

Complete answer:
- The spikes of spikelets inflorescences commonly occur in the family Poaceae. The flowers of Poaceae are arranged in spikelets, and this is a characteristic of the family Poaceae.
- Each spikelet contains one or more florets. The spikelets are further categorized into panicles or spikes. Moreover, a spikelet contains two bracts at the base, which are known as glumes. One or more florets follow these florets.
- A floret contains a flower that is surrounded by two bracts, one is external the lemma, and the other is an internal palea.

Hence, the correct answer is option (C).

Additional information:
The cymose inflorescence is a type of arrangement in such a way that the first flower is placed on the stalk, and the central axis does not allow it to grow continuously. For example, drosera shows cymose inflorescence in which one lateral branch is present.

Note: Poaceae is a large and ubiquitous family of monocotyledons flowering plants known as grasses. This family includes the grasses, bamboos, as well as the grasses of the natural grasslands. This family also contains the species that are cultivated in the lawns and pasture. They are collectively known as the grasses.