Question

What is true for canna flowers? A. irregular and bilateral symmetry B. irregular and zygomorphic C. irregular and radial symmetry D. irregular and asymmetric E. actinomorphic and radial symmetry

Answer 1

Hint: Canna belongs to the family Cannaceae. Both the calyx (a group of sepals) and corolla (a group of petals) have three sepals and petals respectively and these are arranged spirally. So, these cannot be divided equally by the vertical section passing through any plane.

Complete answer:Canna or canna lily is the only genus of flowering plants in the family Cannaceae, consisting of 10 species. These flowers are not true lilies. These plants have large foliage and the horticulturists have developed selected forms as large-flowered garden plants. Cannas are also used in agriculture because they are a rich source of starch for human and animal consumption. Cannas also have high fiber content. Although plants of the tropics, most cultivars have been developed in temperate climates and are easy to grow in most countries of the world as long as they receive at least 6–8 hours average sunlight during the summer, and are moved to a warm location for the winter. It is commercially cultivated in Australia for a product called “ Queensland arrowroot “ and in the Caribbean for a thickening agent called “tous-les mois”. Thus, in the canna flower, there are three sepals in the calyx and three petals in the corolla. Both of these are arranged spirally. So we cannot divide this flower equally by the vertical section which is passing through any plane.
Hence, the correct option is D. irregular and asymmetric

Note: The rhizomes and bulbs of canna are similar in taste to the potatoes but they are not as palatable because they have high fiber content in them. The green leaves and stalks of this plant are used as food for cattle.