For the identification of insects and other fauna and flora of South Africa: please click on the following links:
Insects and related species: Antlions - Ants - Bees - Beetles - Bugs - Butterflies, Moths and Caterpillars - Centipedes and Millipedes - Cockroaches - Crickets - Dragonflies and Damselflies - Grasshoppers and Katydids - Mantis - Stick Insects - Ticks and Mites - Wasps - Woodlice
Plants, Trees, Flowers: (Note: Unless plants fall into a specific species such as Cacti, they have been classified by their flower colour to make them easier to find) Bonsai - Cacti, Succulents, Aloes, Euplorbia - Ferns and Cycads - Flowers - Fungi, Lichen and Moss - Grass - Trees
Animals, Birds, Reptiles etc.: Animals, Birds, Fish and Crabs - Frogs - Lizards - Scorpions - Snails and Slugs - Snakes - Spiders - Tortoise, Turtles and Terrapins - Whipscorpions
Other photography: Aeroplanes - Cars and Bikes - Travel - Sunrise - Water drops/falls - Sudwala and Sterkfontein Caves etc.

Friday, March 8, 2013

Transvaal Gardenia (Gardenia volkensii)

Family Rubiaceae
The bushveld gardenia is a small, relatively slow-growing tree, ideal as a focus plant in summer rainfall gardens or on patios.


Description

Small, multi-stemmed tree with a dense, rounded crown, 3–8 m high with arching branches, sometimes touching the ground. The bark is pale grey and smooth and the branchlets appear knobbly due to persistent leaf-like appendages at the base of the leaf stalk (stipules). The glossy, green leaves are usually in groups of three and crowded at the end of short branches. The leaves are spoon-shaped with a broadly rounded tip and a tapering base. They have small pockets of hair in some axils of veins (domatia) and a wavy margin. The flowers are solitary, large (up to 100 mm in diameter), and showy with a sweet scent. The trumpet-like flowers are white turning yellow with age, with a long tube that opens up into 6–9 lobes. The flowers open during the night and are probably moth-pollinated.

 The flowering season ranges from July to December (winter to summer) and the fruits ripen between December and April (summer to autumn), but may remain on the tree until August. The fruit is almost round, shallowly to strongly ribbed longitudinally, greyish green to white with white, slightly raised dots (lenticels). The fruit contains numerous seeds embedded in pulp.
 Distribution and habitat
Gardenia volkensii prefers open woodland, bushveld and thicket and occurs from tropical Africa through Namibia, Botswana, and the northeastern parts of South Africa into KwaZulu-Natal in the southeast.

 Derivation of name and historical aspects

The genus Gardenia comprises ± 60 species of which 6 occur in southern Africa.

Ecology

Fruit are eaten by monkeys, baboons, elephants and large antelope. Leaves are browsed by game, e.g. giraffe, kudu and impala.

 Uses and cultural aspects

Used medicinally as a cure for intestinal worms. Infusions of the fruit and roots are used to induce vomiting. The ash of burnt roots is rubbed into the chest to treat pneumonia, while headaches are treated by dripping an extract into the eyes or by placing a cold compress on the forehead. For earache an extract is dripped into the ear.

The wood is very hard and suitable for carving ornaments, and plants are also believed to protect against lightning or evil spirits.