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Glossary of plant terms

Search our dictionary of 3,300 botanical and plant-related terms – the largest online.
Or browse the descriptions and definitions using the A-Z.

quadrangularis

Means "four angled" in Latin.

quadrat

This is a small square area of vegetation marked out to count and assess the diversity of plants during an ecological study.

quagmire

A name for a "swampy" area.

quassia

The term for a pest repellent made from the wood of the tropical tree Picrasma excelsa. Wood chips are boiled in water and the liquid is then sprayed on vegetation.

quatrefoil

A term for a leaf with 4 leaflets or a flower with 4 petals.

queach

A term for a dense hedge or thicket.

quercetum

A name given to an arboretum devoted to oak trees.

quercifolius

Means "oak leaf-like" in Latin.

quicklime

Sometimes called lump lime, it is calcium oxide which when mixed with water may be applied to increase the pH reading of soils. Care needs to be taken with quicklime since it is caustic, and hence lime is easier to use.

quilled

Refers to leaves or petals which are more or less tubular in form.

quinatus

Means "with 5 divisions" in Latin.

Quince leaf blight

Irregular dark red, (later turning black) small spots appear on foliage. Leaves turn yellow-brown and fall prematurely.

Quince powdery mildew

Powdery white deposits on both leaf surfaces.

Quintozene

An organic fungicide that is often used for soil-borne fungal diseases such as damping off and some root rots.

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