ABSTRACT
Angiospermae are plants with the seed completely enclosed within an ovary until ripe. They are divided into two classes, the Dicotyledons developing from two 'seed-leaves', already present in the embryo, and the Monocotyledons from one. The plants in Urticaceae family range from dull to frankly unattractive; the flowers are small and greenish, often unisexual, and the leaves are simple, often covered in stinging hairs, which produce a characteristic skin rash called Urticaria. Rafflesiaceae plants are parasitic on the roots of other plants. Cytinus is the only genus here; the two species are parasitic on species of Cistus and Halimium. The flowers are subtended by two brightly coloured bracts, and have a tubular perianth with 5 lobes. Another family of parasitic plants without chlorophyll, represented here by one species only, Cynomorium coccineum, a thick, fleshy pinkish-red plant with thousands of tiny flowers with 1–5 perianth segments arranged on a thick spathe-like stem.
