Opuntia austrina is a highly polymorphic species and has by some workers been divided into a number of other taxa that are here placed in synonymy: These are Opuntia ammophila, Opuntia atrocapensis, Opuntia cumulicola, Opuntia nitens, Opuntia polycarpa, and Opuntia turgida[].

Common Name:

General Information

Opuntia austrina is a usually spiny, evergreen, succulent cactus, usually erect and with a central trunk; it can grow 20 - 120cm tall, occasionally to 200cm[].
The plant has edible fruits[].
Opuntia austrina very widespread within its range and it occurs in protected areas. The plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2017)[].

Known Hazards

The plant has numerous minutely barbed glochids - these are barbed spines that are usually small to minute and are very sharp and brittle. The glochids are very easily dislodged when the plant is touched and can penetrate the skin where, because of their barbs, they become stuck and are very difficult to see and remove. They can cause considerable irritation and discomfort[, ].
Opuntia species can contain quite high levels of oxalic acid, especially in older parts of the plant. Perfectly alright in small quantities, foods containing oxalic acid should not be eaten in large amounts since it can lock-up other nutrients in the food, especially calcium, thus causing mineral deficiencies. The oxalic acid content will be reduced if the plant is cooked. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[, ].

Botanical References

Range

Southeast N. America - central Florida

Habitat

Scrub habitat dominated by scrub oaks, sand hills; at elevations from sea level to 60 metres[].

Properties

Conservation Status	Least Concern
Edibility Rating
Habit	Evergreen Shrub
Height	1.00 m
Pollinators	Bees, Insects
Cultivation Status	Wild

Cultivation Details

In cultivation, Cactus plants generally will not succeed in moist climates. They usually require a sunny position in a well-drained, circumneutral soil and to be kept more or less dry in the dormant season[].

Edible Uses

Fruit - raw[]. The club or barrel shaped, dark purple, red, pink, or yellow-green fruit is 28 - 50mm long[].

The tender young stem segments of various species are often cooked as a vegetable[]. Known as ‘nopals’ in Mexico, where they are a common ingredient in numerous dishes, they can be eaten raw or cooked, used in marmalades, soups, stews and salads. The most commonly used species are Opuntia ficus-indica or Opuntia hyptiacantha (syn Opuntia matudae), although the stems of almost all Opuntia species are edible[, ].

Medicinal

We have no specific information on medicinal uses for this species, but the following notes are likely to apply universally to Opuntia species and other related genera[].

The flesh of tender young stem segments can be applied as a poultice to reduce inflammation[].
The mucilage and soluble fibre found in the flowers and stem segments have been shown to help control blood-sugar levels associated with adult-onset diabetes[].
There is clinical evidence that the soluble fibre in the stem segments helps reduce blood cholesterol levels[].

Other Uses

None known

Propagation

Seed - sow early spring in a very well-drained compost in a greenhouse. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first two winters. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Give the plants some protection from winter wet. Make sure you have some reserve plants in case those outdoors do not overwinter.
Cuttings of leaf pads at any time in the growing season. Remove a pad from the plant and then leave it in a dry sunny place for a couple of days to ensure that the base is thoroughly dry and has begun to callous. Pot up into a sandy compost. Very easy, rooting quickly.