Oxalis enneaphylla

Oxalis enneaphylla, or scurvy grass, is a late spring- and summer-flowering, rhizomatous, alpine perennial herbaceous plant native to the grasslands of Patagonia in Southern Chile and Argentina, and the Falkland Islands. It is a small plant that grows to 7 cm (2.8 in) high and 10 cm (3.9 in) across, with slightly fleshy, hairy, blue-grey leaves, which are edible but have a sharp taste due to their high oxalic acid content. The name enneaphylla comes from the Greek εννεα (ennea), "nine" and φυλλον (phyllon), "leaf". The almond-scented, five-petalled flowers are pink shading to white. They are hermaphrodite and pollinated by Lepidoptera (moths and butterflies). The plant gets its common name "scurvy grass" from the fact that its leaves are rich in vitamin C. It is not closely related to the other plant known as scurvy-grass (Cochlearia), nor is either plant a grass (Poaceae). Sailors travelling around Cape Horn would consume the leaves to avoid scurvy. This is illustrated by this extract......read more on Wikipedia.