Carpobrotus edulis (Sour Fig)
Plant image

Carpobrotus edulis is an easy-to-grow succulent groundcover, ideal for low-maintenance and water-wise gardens. It is also a useful first-aid plant with edible fruits for the herb or kitchen garden.

Name & classification

Botanical name:
Carpobrotus edulis

Common names:
Sour Fig, Cape Fig, Hottentots Fig (English); Ghaukum, Ghoenavy, Hottentotsvy, Kaapsevy, Perdevy, Rankvy, Suurvy, Vyerank, (Afrikaans); ikhambi-lamabulawo, umgongozi (isiZulu)

Plant family:
Mesembryanthemaceae

Plant categories:
Cacti and Succulents; Non-herbaceous Perennials; Groundcovers


Name derivation & history:
Carpobrotus is derived from the Greek 'karpos', meaning fruit and 'brotos', meaning edible.

The Latin words, edulis, means edible, and parviflorus means with small flowers.

The Afrikaans common names ghaukum and ghoenavy come from old Khoi names for the plant.

The name Hotnotsvy (Hottentots fig) was in use as long ago as 1685 and is probably derived from the fact that the colonists observed the Khoikhoi using this plant and eating its fruits. It got the name vy (meaning fig and pronounced fay) because the developing fruits superficially resemble figs but it is in no way related to figs (Ficus species, family Moraceae, the mulberry and fig family).

Pictures

Features

Leaf habit:
Evergreen

Plant shape:
A robust, flat-growing, trailing perennial, rooting at nodes and forming dense mats.

Leaf description:
The leaves are succulent, crowded along the stem, 60 to 130 x 10 to 12mm, sharply 3-angled and triangular in cross-section, yellowish to grass-green, and reddish when older.

Flower description:
Flowers are solitary, 100 to 150mm in diameter, yellow, fading to pale pink, produced mainly during late winter to spring. They open in the morning in bright sunlight, and close at night. Look into the centre of the flower and you'll see many stamens surrounding a beautiful starfish-like stigma. This species is easily distinguished from the others as it is the only one with yellow flowers.

Flower colour:
Yellow fading to pale pink

Flowering months:
August to October

Fruit description:
Fruit is fleshy, indehiscent and edible, 35mm in diameter, shaped like a spinning top, on a winged stalk, becoming yellow and fragrant when ripe.

The outer wall of the fruit becomes yellowish, wrinkled and leathery with age. The seeds are embedded in the sticky, sweet, jelly-like mucilage. The fruits can be eaten fresh and they have a strong, astringent, salty, sour taste. They are not as tasty as those of C. acinaciformis and C. deliciosus which are sweeter.

Bark or stem description:
The succulent horizontal stems curve upwards at the growing point.

Habitat

Natural distribution:
From Namaqualand in the Northern Cape through the Western Cape to the Eastern Cape.

Habitat:
Carpobrotus edulis grows on coastal and inland slopes and it is often seen as a pioneer in disturbed sites.

Water requirements:
Waterwise (little water required)

Frost tolerance:
Semi-tender (tolerates some cold but not freezing)

Light conditions:
Sun; semi-shade

Other Characteristics

Drought resistant
Wind resistant
Salt spray resistant
Suitable for growing in containers

Edibility & Toxicity

Edible fruit
We have no confirmation that any part of this plant is toxic, however we urge caution as this information may be incorrect.

Ecology

Interaction with physical surroundings:
Leaves are eaten by tortoises.

Puff-adders and other snakes such as the Cape Cobra are often found in Carpobrotus clumps where they ambush the small rodents that are attracted by the fruits.

Flowers are pollinated by solitary bees, honey bees, carpenter bees and many beetle species.

Flowers are eaten by antelopes and baboons.

The clumps provide shelter for snails, lizards and skinks.

Fruits are eaten by baboons, rodents, porcupines, antelopes and people, who also disperse the seeds.
Attracts birds
Attracts insects
Attracts mammals
Attracts reptiles

Other information

Uses & Cultural aspects:
The leaf juice is astringent and mildly antiseptic. It is mixed with water and swallowed to treat diarrhoea, dysentery and stomach cramps, and is used as a gargle to relieve laryngitis, sore throat and mouth infections. Chewing a leaf tip and swallowing the juice is enough to ease a sore throat.

Leaf juice or a crushed leaf is a famous soothing cure for blue-bottle stings-being a coastal plant it is luckily often on hand in times of such emergencies. The leaf juice is used as a soothing lotion for burns, bruises, scrapes, cuts, grazes and sunburn, ringworm, eczema, dermatitis, sunburn, herpes, nappy rash, thrush, cold sores, cracked lips, chafing, skin conditions and allergies.

An old and apparently very powerful remedy for constipation is to eat fruits and then drink brackish water. Syrup made from the fruit is said to have laxative properties.

A mixture of leaf juice, honey and olive oil in water is an old remedy for TB.

The leaf juice also relieves the itch from mosquito, tick and spider bites both for people and their animal companions.

The Khoikhoi took an infusion of the fruits during pregnancy to ensure a strong, healthy baby and an easy birth and smeared leaf sap over the head of a new-born child to make it nimble and strong. In the Eastern Cape it is also used to treat diabetes, and diptheria.

Fruits are eaten by people and have been since ancient times. Archaeologists have found plants covering ancient middens along the coast and sometimes marking Khoikhoi burial sites.

The sour fig is frequently cultivated as a sand binder, groundcover, dune and embankment stabilizer, and fire-resistant barrier and also a superb water-wise plant.

Cultivation:
Carpobrotus edulis is easy to grow, one of those plants that thrive on neglect and can be killed with kindness. It needs well-drained soil, a sunny position and room to spread. It is an excellent evergreen drought and wind-resistant groundcover that can be planted on flat, sandy ground, on loose sand dunes, gravelly gardens, lime-rich and brackish soils as well as in containers, rockeries, embankments and will cascade over terrace walls. It is relatively shallow-rooting and is a good choice for a roof garden. Very effective when planted as a groundcover around the house to create a fire-resistant barrier in fire-prone areas. Carpobrotus edulis is not frost-hardy.

Carpobrotus edulis roots easily from cuttings. Take 200-300 mm long tip cuttings during the summer. No rooting hormone or mist unit is required, either plant them where they are intended to grow or directly into a container filled with well-drained potting soil.

Seed can be sown in spring, early summer or autumn. Seedlings damp off easily and must be grown in pure sand for best results.

Pests & diseases:
High humidity will cause bacterial rot of the leaves. Plants in shady positions or poorly drained sites are often affected by fungal diseases (Botrytis). Snails cause leaf damage in damp gardens. Plants in old clumps may die back in the centre. Over-fertilizing will cause wilt and die-back.

Notes:
Carpobrotus edulis is not regarded as threatened in its native habitat, but it is invading natural areas in other parts of the world and threatening the survival of other species. In California, where it has been used since the early 1900s to stabilize the soil along railway tracks and roadsides and as a garden ornamental, it has naturalized and is invading coastal vegetation from north of Eureka to Rosarita Bay. It is known as the highway ice plant in the USA. It has naturalized along the west coast of Australia from Perth to Albany where it was also used for soil stabilization and is known as pigface. It has naturalized in parts of the Mediterranean and on the south coast of England.

Your notes & lists

You need to be a registered user in order to create plant lists and notes. If you have already registered, then please log in now, otherwise, register here. It will only take a moment and we won't pass your information on to anyone else.

You can then use this section to create lists of your own plants in your garden, or a list of favourite plants or simply a wish list