Question

Family Fabaceae belongs to series
(a) Inferae
(b) Thalamiflorae
(c) Calyciflorae
(d) Disciflorae

Answer 1

Hint: The seeded plants are classified into three different classes and they are Dicotyledonae, Gymnospermae, and Monocotyledonae. The English botanists Sir Joseph Dalton Hooker (1817 to 1911) and George Bentham (1800 to 1884) proposed this classification.

Complete answer:
The first class Dicotyledonae has seeds containing two cotyledons and the leaves appear to have reticulate venation. The flowers may be tetramerous (having four members in various floral whorls) or pentamerous (having five members in various floral whorls) . This is further subdivided into Polypetalae, Gamopetalae, and Monochlamydeae. The Polypetalae have flowers with free petals and the calyx and corolla are distinct. This includes three series and they are Thalamiflorae, Disciflorae, and Calyciflorae. The Thalamiflorae plant flowers have a dome or conical thalamus and the ovary is superior. This has 6 orders and 34 families. The Disciflorae has plants with the flowers having prominent disc-shaped thalamus placed below the ovary. This includes 4 orders and 23 families. The Calyciflorae has plants with flowers that have cup-shaped thalamus and the ovary can be superior, inferior, or sometimes half inferior. This is divided into 5 orders and 27 families with the family Fabaceae being included in the order Rosales.

So, the correct answer is ‘(c) Calyciflorae'.

Note: Fabaceae is also known as the Leguminosae is a pea family of flowering plants and is the third-largest family among the angiosperms. It includes more than 700 genera and 20,000 species of vines, trees, herbs, and shrubs distributed worldwide. They are mostly tropical and some occur in temperate regions. Some commercial species are soybeans, peanuts, and garden peas. The leaves of these plants are pinnately compound and sometimes trifoliate or palmate.