Question

Spike of spikelets inflorescence commonly occurs in
A. Cruciferae
B. Papilionaceae
C. Poaceae
D. Solanaceae

Answer 1

Hint: A cluster of flowers present on a single branch or a system of branches is described as inflorescence. Based on the arrangement of the flowers on the central axis peduncle and the timing of flowering, inflorescence is classified as determinate and indeterminate.

Complete answer:
The spikes of spikelet inflorescences are commonly seen in the family poaceae. Flowers of the plants that are in the family poaceae are arranged in spikelets. Each of these spikelets contains one or more florets. These spikelets are further classified into spikes or panicles. Two bracts found at the base of a spikelet is known as glumes. A flower that is surrounded by two bracts in a floret is called a lemma, which is an external and internal palea.

Hence, the correct answer is option (C).

Additional information:
Development Of the inflorescence in the Poaceae family begins when the shoot apical meristem changes from its vegetative state, by producing leaves on its flanks, to an inflorescence meristem. Bracts also form like any other flowering plants, but their growth is suppressed, the mature inflorescence is called as ebracteate. Neither the branch meristems nor the inflorescence meristem are ever converted directly to floral meristems. Instead of all the higher-order meristems produced by these inflorescence meristems and its branches are converted to spikelet meristems, which first produce two bracts called as glumes, followed by one or more flowers in tiny spikes.

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