Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Jostaberry, Ribes x nidigrolaria , growing on the plant.

Jostaberry, Ribes x nidigrolaria , growing on the plant.

Gooseberry, Ribes uva-crispa 'Black velvet', growing outdoor on the plant.

Gooseberry, Ribes uva-crispa 'Black velvet', growing outdoor on the plant.

Currant, Blackcurrant:Ribes nigrum 'Ben Nevis', Growing outdoor on the bush.

Swiss chard, Beta vulgaris 'Bright Lights', close up of the colourful stems.

Mountain blechnum, Blechnum tabulare. A close up of fronds showing pattern and detail of curled tips.

Golden male fern, Dryopteris affinis growing in a dry stone wall in Cornwall, UK.