Volunteers took advantage of the sunny weather this morning to weed wild radish, Raphanus raphanistrum, on the southern facing slope in front of the cell house. This annual weed, a member of the mustard family – Brassicaceae – has naturalized in North America from its native Eurasia.
This overgrown section of the slope was stabilized in 2007 with waddles and jute netting but has since become overgrown with radish, Lavatera and oxalis. This is the first year that we are attempting to control the radish. Our intent is to reduce the number the weed seeds so that in future years, this slope will be planted with the Persian carpet, Drosanthemum floribundum that was historically planted on this slope during the 1920s.
The radish is just beginning to establish itself for the summer by sending its long taproot deep into the soil to find moisture. Volunteers took on the challenge of pulling the entire root, otherwise the plant will continue to grow. Either it was the hard work or the scent of fresh radish but like other radishes, these roots are edible and soon the volunteers were nibbling at the roots. The flowers are also edible and are easily identifiable with four petals ranging in color of pale yellow, apricot, pink and white. When considering consuming any plant from the wild, it is vital to be confident that you have positively identified the plant.