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Leaves of most plants include a flat structure called the blade or lamina supported by a network of veins, a petiole and a leaf base; [1] but not all leaves are flat, some are cylindrical. [ citation needed ] Leaves may be simple, with a single leaf blade, or compound, with several leaflets .
A plant that loses all of its leaves only briefly before growing new ones, so that it is leafless for only a short time, e.g. approximately two weeks. bristle A straight, stiff hair (smooth or with minute teeth); the upper part of an awn (when the latter is bent and has a lower, stouter, and usually twisted part, called the column ).
Leaves are approximately 6.5–15 centimetres (2 + 1 ⁄ 2 –6 inches) and of oval or elliptical shape that are either opposite or alternate across species, although most leaves are whole and simple with entire margins. [5] Amaranth has a primary root with deeper spreading secondary fibrous root structures. [13]
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Tillandsia is a genus of around 649 species of evergreen, perennial flowering plants in the family Bromeliaceae, native to the forests, mountains and deserts of the Neotropics, from northern Mexico and the southeastern United States to Mesoamerica and the Caribbean to central Argentina.
The plain green leaves of A. cylindraceum appear in early spring (late March–early May) followed by the flowers borne on a poker-shaped inflorescence called a spadix, which is partially enclosed in a grass-green spathe or leaf-like hood. The flowers are hidden from sight, clustered at the base of the spadix with a ring of female flowers at ...
The leaves and stems of the plant can be cooked as a leaf vegetable if gathered before the fruits harden. [9] However, the numerous small hooks which cover the plant and give it its clinging nature can make it less palatable if eaten raw. [27] [28] Cleavers are in the same family as coffee.
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