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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Showing 368 definitions
Synonyms: Dextrinoids

Dextrinoid A type of chemical staining reaction in which the tissues of certain fungi (spore wall ornamentation, etc.) stains reddish to reddish-brown in Melzer's reagent.

Synonyms: Dicot, Dicots, Dicotyledons

Dicotyledon A dicotyledon (commonly known as a dicot) is a flowering plant that begins life with two seed leaves, called cotyledons. Dicots typically have broad leaves with branching veins, flower parts in multiples of four or five, and a taproot system. Many trees, shrubs, wildflowers, and garden plants are dicots, including oaks, maples, roses, and sunflowers. Did You Know? Most of the trees found in…

Synonyms: Dimorphics

Dimorphic Having two different forms, often a juvenile form and an adult form. Did you know? English ivy has different juvenile and adult leaf forms; the adult flowering form has unlobed leaves.

Synonyms: Dissecteds

Dissected Deeply divided into many narrow segments. This feature helps describe plant form, function, or identification. Did you know? Finely dissected leaves, such as some Japanese maples, create a delicate texture valued in garden design.

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