compare the ovule of cycas ,pinus and ephedra
Cycas and Pinus are evergreen perennials while Ephedra is perennial with scaly leaves. Cycas and Ephedra are dioecious while Pinus is a monoecious plant. Cycas is 5-15 feet in height (C. media 20’), resembling in habit with palms on the one hand and tree ferns on the other. Pinus is about 15-45 metres in height while Ephedra is a straggling shrub with few species as lianes.