Arboretum Botanical Glossary

A botanical reference guide of morphological terms, plant structures, propagation techniques, and campus flora definitions.

368 Botanical Definitions 10 Categories A–Z Alphabetical Index Illustrated Growth Forms

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Explore terms organized by botanical structure, morphology, and arboricultural concepts.

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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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Synonyms: Biserrate, Biserrates, saw toothed, saw-toothed, Serrates, Serrulate, Serrulates, toothed edge

Serrate With a saw-toothed edge. Botanists use this feature to describe leaf shape, surface, edge, or arrangement, which helps with plant identification.

Synonyms: Simples

Simple Not divided into leaflets. Botanists use this feature to describe leaf shape, surface, edge, or arrangement, which helps with plant identification.

Synonyms: Sinuates, strongly wavy

Sinuate With a strongly wavy margin. In mushrooms, referring to a type of gill attachment, specifically gills that are notched at their point of attachment to the stipe (stem)

Synonyms: Spathes

Spathe A bract or leaf encasing a flower cluster. This feature helps explain how flowers are arranged, how pollination happens, or how seeds begin to form. Did you know? The colorful part of a peace lily is a spathe, a modified bract, not a true petal.

Synonyms: Spathulate, spathulate, Spathulates, Spatulates

Spatulate Shaped like a spatula, with a rounded tapering blade. Botanists use this feature to describe leaf shape, surface, edge, or arrangement, which helps with plant identification.

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