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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.
A stipule is "adnate" if it's fused together on part of the petiole length, but the anterior is still free. A stipule is "interpetiolar" if it is located in between the petioles, as opposed to being attached to the petioles, and generally one stipule from each leaf is fused together, so it appears that there's just one stipule between each leaf.
A structure on the stem node of a cactus, morphologically a specialised branch; the region of a cactus upon which spine s, glochid s, and flowers are borne. aril A membranous or fleshy appendage formed by expansion of the funicle which partly or wholly covers a seed , e.g. the fleshy outer layer of lychee fruit, or that found in members of the ...
[1] [6] The flower stem is known as a pedicel, and those flowers with such a stem are called pedicellate, while those without are called sessile. [7] In the angiosperms, the flowers are arranged on a flower stem as an inflorescence. Just beneath (subtended) the flower there may be a modified, and usually reduced, leaf, called a bract.
Chart illustrating leaf morphology terms. The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets). [1]
It can be the main stem of a compound leaf, such as in Acacia or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle. Where it subdivides into further branches, these are known as rachillae (singular rachilla). The central spine that remains when an Abies seed cone disintegrates is also called the rachis.
Ischial spine, part of the posterior border of the body of the ischium bone of the pelvis; Mental spine, on the mandible; Anterior nasal spine, a bony projection in the skull; Posterior nasal spine, for the attachment of the musculus uvulae; Spine of scapula, a prominent plate of bone; Spine of sphenoid bone (spina angulari) and ethmoidal spine
Euphorbia tithymaloides has a large number of household names used by gardeners and the public. Among them are redbird flower, [7] devil's-backbone, [8] redbird cactus, Jewbush, buck-thorn, cimora misha, Christmas candle, fiddle flower, ipecacuahana, Jacob's ladder, Japanese poinsettia, Jew's slipper, milk-hedge, myrtle-leaved spurge, Padus-leaved clipper plant, red slipper spurge, slipper ...