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External leaf characteristics, such as shape, margin, hairs, the petiole, and the presence of stipules and glands, are frequently important for identifying plants to family, genus or species levels, and botanists have developed a rich terminology for describing leaf characteristics. Leaves almost always have determinate growth.
Leaf Parts: – A complete leaf is composed of a blade, petiole, and stipules, but in many plants one or more might be lacking or highly modified. Blade – see lamina. Lamina – the flat and laterally-expanded portion of a leaf blade. Leaflet – a separate blade, among others, of a compound leaf
whole leaf: Cleft into many parts or lobes obcordate: obcordatus: whole leaf: Heart-shaped, stem attaches at the tapering end oblanceolate: oblanceolatus: whole leaf: Much longer than wide and with the widest portion near the tip; reversed lanceolate oblique: leaf base: Asymmetrical leaf base, with one side lower than the other oblong: oblongus ...
Phytomorphology is the study of the physical form and external structure of plants. [1] This is usually considered distinct from plant anatomy, [1] which is the study of the internal structure of plants, especially at the microscopic level. [2] Plant morphology is useful in the visual identification of plants.
Chloroplasts in leaf cells of the moss Mnium stellare. Plant anatomy or phytotomy is the general term for the study of the internal structure of plants.Originally, it included plant morphology, the description of the physical form and external structure of plants, but since the mid-20th century, plant anatomy has been considered a separate field referring only to internal plant structure.
In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole).Stipules are considered part of the anatomy of the leaf of a typical flowering plant, although in many species they may be inconspicuous —or sometimes entirely absent, and the leaf is then termed exstipulate.
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1. The external part of a cone scale. 2. An outgrowth of an organ or an enlargement of a stem. appendage A secondary part attached to a main structure; an external growth that seldom has any obvious function, hence appendiculate. appendiculate Having the nature of or bearing appendage s. appressed
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