Quercus acutissima ( Sawtooth Oak )

Quercus acutissima grows from 35 to 45 feet in height with a broad rounded form, wide spreading branches. New leaves emerge golden yellow, they lack the typical oak-leaf shape, are simple, dark green in summer, yellow to golden brown in […]

Oxytenanthera abyssinica ( Abyssinian Bamboo )

This species is native to Ethiopia. It has zigzag shaped culms that are bright green. Bamboo is a common term for a large number of giant grasses that include many different species and varieties. There are two main types of […]

Oxalis violacea ( Sorrel )

O. violacea has brown scaly bulb and palmate leaves and flowers of rosy purple in umbels of 3 to 10 on a 6 inch stem. Oxalidaceae is a genus of about 800 species. Many are tuberous, the leaves are usually […]

Oxalis magellanica ( Sorrel )

O. magellanica has bronze leaves and flowers in gleaming white. Oxalis is a genus of about 800 species. Many are tuberous, the leaves are usually three-lobed and clover-like. Both the leaves and flowers close up in dull weather and at […]

Oxalis lobata ( Sorrel )

O. lobata is a clump forming perennial that has bright green leaves and blooms with large funnel shaped flowers of golden yellow, spotted with red. O. Oxalis is a genus of about 800 species. Many are tuberous, the leaves are […]

Oxalis hirta ( Sorrel )

O. hirta has sessile leaves, hairy and pale green and has funnel shaped blooms in white, pink or purple. A genus of about 800 species. Many are tuberous, the leaves are usually three-lobed and clover-like. Both the leaves and flowers […]

Oxalis enneaphylla ( Rosea Sorrel )

Clumps of umbrella-like, somewhat fleshy, hairy, grey-blue leaves, consisting of 9 to 20 narrowly pleated, oblong leaflets. Flowers are light purple-pink and funnel-shaped. Nice companion plant in containers or along shady, moist walk that receives morning sun. Does best where […]

Oxalis cernua ( Sorrel )

O. cernua has leaves with long hairs and blooms in 8 to 10 golden yellow flowers in an umbel. Oxalis is a genus of about 800 species. Many are tuberous, the leaves are usually three-lobed and clover-like. Both the leaves […]

Oxalis adenophylla ( Shamrock )

O. adenophylla, has a bulbous rootstock that has crinkled grey-green, fan shaped foliage with goblet shaped, creamy pink flowers in late spring. Oxalis is a genus of about 800 species. Many are tuberous, the leaves are usually three-lobed and clover-like. […]