Prickle
/ˈprɪkəl/
Definition
Prickle refers to a small, sharp outgrowth on a plant’s surface, usually from the epidermis or outer tissues of a stem or leaf. Unlike a thorn or spine, it is not a modified stem, branch, leaf, or stipule, and it usually breaks off more easily. Roses are a common example. In horticulture, this distinction matters for correct plant identification and description.
Botanical Significance
- Defense against browsing: On many plants, prickle can make stems less appealing to mammals and other animals, which may reduce feeding damage on young shoots and canes.
- Useful for plant identification: The presence, density, size, and placement of prickle are often noted in plant descriptions and identification keys, especially in groups such as roses and brambles.
- Different from thorns and spines: Because prickle does not develop from deep internal tissues, it can often be snapped or scraped off more easily than true thorns or spines, which helps separate similar-looking structures in botany.
- Handling and pruning implications: In gardening, stems with prickle need careful handling during pruning, training, and propagation, since they can catch on skin, gloves, and clothing.
Related Terms
Thorn
Thorn refers to a sharp, rigid, pointed plant structure formed from a modified stem or branch. Unlike prickles, which…
Spine
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Stem
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Branch
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Leaf
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Areole
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Trichome
Trichome refers to a small hair-like or scale-like outgrowth from a plant’s epidermis, the outer cell layer. It may be…
Bark
Bark is the protective outer covering of woody stems, trunks, and roots in trees and shrubs. In botanical use, it…