Botanical illustration: how to read an old plate

Plants · 4 September 2026

A botanical plate is not decoration but a key. It has to let you recognise the plant, so next to the flower the artist drew the leaf, the fruit, the seeds, sometimes the root and a section of the bloom. If the sheet shows only a pretty bouquet, that is a different genre.

Three genres that get confused

• Florilegium – a book of flower studies, often commissioned by a garden's owner. Plants appear in bloom; the sheet leans towards art rather than science.
• Herbal – a practical book about medicinal plants: recognisability and use matter more than beauty, and the drawing is simpler.
• Scientific plate – a sheet from a botanical work with a Latin name, enlarged details and labelled parts.

What a plate shows

1. Habit. Stem, leaves and flower at one scale – the basis of identification.
2. Fruit and seeds. Often placed separately: they separate close species.
3. Root or bulb. For many plants a key character, so it was drawn whole.
4. Section and magnification. The inside of the flower marks a scientific rather than decorative plate.
5. Caption. A Latin name and plate number tie the sheet to the text of the edition.

What carries value

Completeness of the edition and original hand colouring. A single plate from a broken book is worth noticeably less than the same plate inside a complete copy. Then comes condition: trimmed margins, water staining and fading all lower the grade. Paper of the seventeenth and eighteenth centuries is heavy and watermarked – the watermark helps verify the edition.

What the archive holds

The collectioner.art collection holds 87 botanical plates from 1608 to 1885: 60 flower studies, 13 other plates, 9 of fruits and seeds, 4 of trees and one herb. The densest stretch is the early seventeenth century with 71 sheets. Sources: the open collections of the Cleveland Museum of Art and the Smithsonian Institution.

Open it: the Plants collection. Nearby: scientific instruments and clocks from the same collections.