Addo ppc trail
For Adrian Hardy Haworth (1768–1833), English botanist, entomologist, carcinologist and an authority on succulents and lepidoptera. He did pioneering work in North America, Canada and Mexico focusing on cacti, and published Synopsis Plantarum Succulentarum (1819) with subsequent supplements. In England he collected and studied butterflies, publishing Lepidoptera Britannica (1803–1828). During his life he amassed a collection of over 40 000 insects. He was a Fellow of the Linnaean and Royal Horticultural societies and a friend of Sir Joseph Banks. In 1833 he lent support to the founding of what was to become the Royal Entomological Society of London.
For Paul Hermann (1646–1695), German-born Dutch physician and botanist. He graduated in medicine at the universities of Leiden and Padua, became a ship’s medical officer (1672–1677) for the Dutch East India Company and went to Sri Lanka via the Cape, where he made the first known herbarium collection of local plants, now housed in the Sloane Herbarium, British Museum of Natural History and at Oxford. In 1679 he became professor of botany at the University of Leiden and director of the Hortus Botanicus in Leiden, Europe’s finest botanical garden. His 1687 publication Horti Academici Lugduno-Batavi Catalogus includes 34 Cape plants, and his proposed Prodomus Plantaerum Africanarum was to contain 791 items, but untimely death intervened.
From the Greek oxys = sharp, sour or acid and (h)als = salt. The plant is frequently consumed for its sour taste caused by the oxalic acid, particularly the flowering stalks of O. pes-caprae. In large quantities the oxalic acid inhibits digestion and in stock leads to the condition 'dikpens' or bloated belly.