Trimerous flower, superior ovary and axile placentation is characteristics of
Liliaceae
Cucurbitaceae
Solanaceae
Compositae
Clinging roots are found in
orchids
Trapa
Podostemon
screwpine
A.
orchids
Clinging roots are found in orchids. They grow as epiphytes upon the trunks or branches of trees. They hang freely in the air and absorb atmospheric moisture using velaman (modification of epidermis).
Most of the economically important fibre yielding plants belong to family
Malvaceae
Solanaceae
Cruciferae
Paceae
Ginger is an underground stem. It is distinguished from root because
it lacks chlorophyll
it stores food
it has nodes and internodes
it has xylem and vessels
Floral formula of k5 C5 A5+5 G1 is characteristic of the family
Papilionaceae
Caesalpinoideae
Cruciferae
Mimosoideae