Meanwhile, pencils, brushes and paints require attention. We are not Van Gogh, throwing paint around or chopping off our ears. Lucy’s equipment is a model of neatness, while mine is not. I quickly learn the difference this makes to the delicacy of a brushstroke or the accuracy of pencil marks, and how effectively a nice clean rubber erases mistakes. The group gathers round an electron microscope, a magical instrument not available when I was working for biologist Miriam Rothschild on a book about gardening for butterflies.

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The artist’s studio at the end of the garden has a stable below it.

Lavinia Cernau

With electronic magnification, the sweetest of blossoms becomes a prehistoric monster worthy of Jurassic Park. Plants, as with dinosaurs, are programmed for survival. There are tiny globules of stickiness on stems and leaves that allow insect-eaters – sundews or butterwort – to trap and digest their prey. My own choice is a ghost orchid, a plant that, lacking the ability to process sunlight, sucks colour as well as nourishment from its quarry. Botanical artists study surface – the number of petals, the distribution and shape of leaves, the way a flower sits on the stalk – in much the same way that a portrait painter considers the colour of skin, texture of hair or the set of a head on shoulders. The challenge is not to show that each plant is identical, as can happen with photographs, but to tell the truth – provide a record of life rather than an image frozen in time.

Every evening, we all – tutor, guests and host – gather in the book-lined comfort of the drawing room, while our hostess works with tranquil confidence in the open kitchen beyond. Rachel has a strong sense of place and is an instinctive cook who does not follow recipes, though tradition and inspiration are both evident in the beautiful dishes she sets on the table.

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Tomatoes are among the homegrown produce showcased in Rachel’s recipes.

Lavinia Cernau

She grinds her own cornmeal from dried maize kernels for naturally yeasted bread. Eggs, butter, honey and fresh white cheese are laid out in the kitchen for breakfast. Beautiful salads – with young beetroot, new potatoes, fresh herbs – appear like magic on a long wooden table for lunch outside. At the end of the day, there are delicious stews made with just-dug vegetables and newly cut greens, washed down with local wine, to be savoured with a view of the rose arbour that leads to the studio. If it sounds idyllic, indeed it is. And a lesson, too, in how to walk lightly on the earth that’s all too easily forgotten.

Ways and means

Transylvania School of Botanic Art & Illustration offers eight, week-long residential masterclasses a year, €2,700 each per person, full board, including five days’ tuition, transfers and excursions. Wizz Air flies from London Luton to Sibiu Airport, a 90-minute drive from Copsa Mare.