It divides cells to create new tissues. The organ on a gametophyte plant which produces the egg cell, and nurtures the young sporophyte . The angle formed between a leaf stalk and the stem to which it is attached. In flowering plants, buds develop in the axils of leaves. When a flower or cone produces both megaspores and microspores , it is said to be bisporangiate.
Most flowers are bisporangiate.
Any broad and flattened region of a plant or alga, which allows for increased photosynthetic surface area. Any reduced leaf-like structure associated with a cone or flower. In cycads , a scale-like modified leaf which protects the developing true leaves. Any tough layer which surrounds a cell and its cell membrane. In plants, this wall is composed of cellulose .