OXALIS. Nearly worldwide. In addition to some much-despised weeds, this group includes a broad assortment of highly ornamental perennials. They grow from underground rhizomes, which may develop bulbous structures. Most have clover-like leaves and relatively large 5-petalled flowers of white, pink to red, purple or yellow. Many are suitable for container and rock garden use. Sun, most soils, moderate watering during growth and bloom, except as noted. Those which die down at some point may go completely dry for the dormant season, though most will tolerate moisture at this time. Hardy to 20oF or below, less as indicated (where known).
braziliensis. A bulbous perennial, with three-parted leaves rising 2-3" from the ground. Above them are displayed many purplish pink flowers with yellow centers, about 1" broad, in May and June. One of the more tender species, best protected from hard winter frosts.
magellanica. A dense, ground-hugging carpet with small, dark, 3-parted leaves. It is dotted in summer with 1/2" white flowers. A plant for rock gardens and containers.
rubra. A tuberous species, virtually evergreen in our climate. It makes small, dense colonies of shoots, with bright green leaves rising on slender stalks 6-12" long. It produces a continual show of flowers for many weeks in spring and summer. Those of the current selection are about 1” in diameter and deep pink in color (there are many other forms). 20oF. or less.