Glossary: Stem / root structures

Purdue Arboretum botanical terminology reference and learning database.

368 Botanical Definitions 10 Categories A–Z Alphabetical Index Illustrated Growth Forms
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Stem / root structures

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Illustrated Growth Forms & Tree Silhouettes

Compare visual architectures: fastigiate, columnar, weeping, spreading, and more.

Fastigiate Columnar Pendulous / Weeping
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Letter: P Showing definitions beginning with this letter.
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Showing 4 definitions
Synonyms: Armed, Armeds, Echinate, Echinates, Echinulate, Echinulates, Prickles, Spine, Spines, Spinose, Spinoses, Spinule, Spinules, Spinulose, Spinuloses, Thorn, Thorns, Unarmed, Unarmeds

Prickle A sharp outgrowth of the epidermis or bark, different from a thorn or spine. Did you know? Rose “thorns” are prickles, which arise from the outer stem tissue rather than being modified branches.

Synonyms: Pseudobulbs

Pseudobulb A thickened above-ground modified stem of some orchids. This feature helps describe plant support, storage, water movement, or vegetative spread. Did you know? Orchid pseudobulbs store water and nutrients, helping the plant survive dry periods between rains.

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