DENDROLOGY

Detailed explanation-1: -Plants which do not have roots, stems, and leaves are called thalloid or foliose plants.

Detailed explanation-2: -Nonvascular plants include liverworts, hornworts, and mosses. They lack roots, stems, and leaves. Nonvascular plants are low-growing, reproduce with spores, and need a moist habitat.

Detailed explanation-3: -Plants have different parts, each with its own job to do. They must have roots, stems and leaves. Each part of the plant must do its job so the plant can stay healthy and grow. A plant’s roots grow under the ground.