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Stipules have various functions. Some stipules are not well understood or may be vestigial. It is known that foliaceous stipules are used like leaves to make energy for the plants. Sometimes stipules protect the next leaf or bud as it grows in then falls off after the leaf unfolds, as with Tulip Poplars. [4]
A multicellular, glandular hair that usually produces a mucilaginous substance and is located on sepal s, stipules, or petioles, or on nearby parts of stem s; commonly found on plants in the order Gentianales. columella In flowering plants, the central axis of the cone or fruit, e.g. in Callitris. column 1.
An ochrea (Latin ocrea, greave or protective legging), also spelled ocrea, is a plant structure formed of stipules fused into a sheath surrounding the stem, and is typically found in the Polygonaceae. In palms it denotes an extension of the leaf sheath beyond the petiole insertion.
The petiole is a stalk that attaches a leaf to the plant stem. In petiolate leaves the leaf stalk may be long (as in the leaves of celery and rhubarb), or short (for example basil). When completely absent, the blade attaches directly to the stem and is said to be sessile. Subpetiolate leaves have an extremely short petiole, and may appear sessile.
1 Function of the stipule. 1 comment. 2 Widely-used definition. 2 comments. 3 Why isn't this drawing used in this article. 2 comments. Toggle the table of contents ...
In flowering plants, the term is often used in reference to a stalk that sometimes supports a flower's ovary. In orchids , the stipe or caudicle is the stalk-like support of the pollinia . It is a non-viscid band or strap connecting the pollinia with the viscidium (the viscid part of the rostellum or beak).
Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
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 .