They vary widely in appearance and and typically live in deserts and tropical rain forests. All angiosperms reproduce by means of covered seeds. Once fertilization, the ovary grows into a fruit that encloses the seeds. Angiosperms, the most diverse group of plants can be found growing from the tropics to the polar regions and are divided into two subclasses, Monocotyledonae and Dicotyledonae. The main veins in the leaves of these plants usually run parallel to each other and usually occur in multiples of three.
Dicots have seeds with two cotyledons.
Their leaves have a complex system of veins. The dicot's flower parts usually occur in multiples of four, sometimes five. Nonvascular plants Division Bryophyta Mosses, liverworts, hornworts make up this division of plants. These plants reproduce by means of spores and lack true leaves, stems, or roots. Most live in moist areas.