From the category archives:

Terminology

Petiole

Terminology

pet·i·ole   [pet-ee-ohl]
The stalk of a leaf, attaching the blade to the stem.

Swiss Chard – Petiole source: eflon (Flickr)

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Pistil (pis·til)

Terminology

Female reproductive structure of a flower, composed of an ovule-containing ovary at the base, one or more pollen-receiving stigmas at the tip.

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Leaf Scar

Terminology

The mark left on the twig at the point of attachment of a leaf petiole when the leaf falls.

Tree of Heaven (Ailanthus altissima) – Leaf Scar

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Glabrous

Terminology

gla·brous (glā’brəs)
Smooth without hairiness or roughness.
gla·brous   (glā’brəs)
Glabrous. Smooth without hairiness or roughness.

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Lanceolate

Terminology

lan·ce·o·late   (lăn’sē-ə-lāt’)
lan·ce·o·late   (lăn’sē-ə-lāt’)
Lance-shaped, broadest above the base, gradually narrowing to the apex.

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Fertile

Terminology

fer·tile (fûr’tl)
Capable of producing fruit; or productive, as a flower having a pistil or an anther having pollen.

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Pinnately Compound Leaves

Terminology

Pinnately compound leaves have the leaflets arranged along the main or mid-vein.

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Aggregate Fruit

Terminology

ag·gre·gate fruit (ăg’rĭ-gĭt frūt)
A fruit that develops from the fusion of more than one carpel within a single flower. (examples: raspberry, blackberry)

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Crenate

Terminology

cre·nate   (krē’nāt’)
Having a margin with low, rounded or scalloped projections: a crenate leaf

Katsura – image source flickr user: Schnittke

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Globose

Terminology

glo·bose (glō’bōs’)
Spherical; globular.

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