Country diary: Fifty shades of green | Nic Wilson

Hexton, Hertfordshire: On the chalk hills in early summer, green is dominant - but only until the yellows take overThe rain-soaked chalk hills are a celebration of green: the green of crimped agrimony leaves and glaucous sedge blades; of horsetail, hogweed and unripe wayfaring berries. Greenery everywhere, energising everything. I hear it in the whitethroat's scratchy bursts, see it in sunlight on spent cowslips and feel it in the pull of my breath as I climb the hill. I wonder if it's the heightened sensitivity of the human eye to green light that has brought on this verdant synaesthesia. Whatever the reason, the intensity of colour fuses and confuses my senses, making it hard to spot the green orchids I've come here to see.But as the path narrows, the abundance of orchids - all of them common twayblades (Neottia ovata) - is such that I almost tread on one. Kneeling in the grass for a closer look, I can see inflorescences rising from pairs of egg-shaped leaves, each with a slender downy stem and green flowers held aloft on short stalks. Every year I'm astonished by the huge personalities of these miniature blooms. The labellum (the lower modified petal) is deeply forked like a pair of legs, and banded with two dark green stripes that mark a nectar-bearing groove. Continue reading...