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Opuntia microdasys

Common name:	Bunny Ears	Family:	Cactaceae
Author:	(Lehm.)Pfeiff.	Botanical references:	200
Synonyms:
Known Hazards:	The plant has numerous minutely barbed glochids (hairs) that are easily dislodged when the plant is touched and they then become stuck to the skin where they are difficult to see and remove. They can cause considerable discomfort[200].
Range:	South-western N. America.
Habitat:	Not known
Edibility Rating (1-5):	3	Medicinal Rating (1-5):	0

Epithets:	From a Dictionary of Botanical Epithets
	microdasy = small hairy;
Systematics:	From a USDA Plants Database
	Order: Caryophyllales. Cactus family
Noxious, Invasive and Injurious Weeds	From USDA PLANTS database, Weeds Australia , DEFRA Injurious Weeds
	Listed as noxious/invasive for: New South Wales, South Australia, Western Australia, Tasmaina, Queensland, Northen Territory (Aust).

Physical Characteristics

An evergreen perennial growing to 0.6m by 0.6m . It is hardy to zone 8 and is not frost tender. It is in leaf all year, in flower from July to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. We rate it 3/5 for edibility and 0/5 for medicinal use.

The plant prefers light (sandy) and medium (loamy) soils and requires well-drained soil. The plant prefers acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It requires dry soil and can tolerate drought.

Habitats and Possible Locations

Cultivated Beds, By Walls, By South Wall, By East Wall.

Edible Uses

Fruit; Leaves; Seed.

The following notes are for O. compressa. They almost certainly also apply to this species[K].

Fruit - raw, cooked or dried for later use[3, 46, 61, 62, 183]. Sweet and gelatinous[85]. Lean and insipid[95]. The unripe fruits can be added to soups etc, imparting an okra-like mucilaginous quality[183]. The fruit can hang on the plant all year round[160]. Be careful of the plants irritant hairs, see the notes above on toxicity. The fruit of O. microdasys is about 3cm in diameter[200].
Pads - cooked or raw[62, 160]. Watery and very mucilaginous[85].
Seed - briefly roasted then ground into a powder[62]. It is also used as a thickener[62].

Medicinal Uses

Disclaimer

None known

Other Uses

Gum.

The following notes are for O. ficus indica. They almost certainly also apply to this species[K].

A gum is obtained from the stem. It is used as a masticatory or mixed with oil to make candles[64]. The juice of the boiled stem segments is very sticky. It is added to plaster, whitewash etc to make it adhere better to walls[92].

Cultivation details

Requires a sandy or very well-drained soil[160]. Prefers a pH in the range 6 to 7.5[200]. Plants must be kept fairly dry in winter but they like a reasonable supply of water in the growing season[200]. A position at the base of a south-facing wall or somewhere that can be protected from winter rain is best for this plant. Requires warmth and plenty of sun. Plants tolerate considerable neglect.
This species is fairly cold tolerant and can succeed outdoors in a selected site in the milder areas of the country[200]. The stems develop brown marks at low temperatures[188].
Flowers are formed on plants that are more than 15cm tall[188].

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.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for opuntia microdasys (a possible synonym).

[HP] PhotoFrom Henriette's plant pictures

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[3] Simmons. A. E. Growing Unusual Fruit. David and Charles 1972 ISBN 0-7153-5531-7
A very readable book with information on about 100 species that can be grown in Britain (some in greenhouses) and details on how to grow and use them.

[46] Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[62] Elias. T. and Dykeman. P. A Field Guide to N. American Edible Wild Plants. Van Nostrand Reinhold 1982 ISBN 0442222009
Very readable.

[64] Howes. F. N. Vegetable Gums and Resins. Faber
A very good book dealing with the subject in a readable way.

[85] Harrington. H. D. Edible Native Plants of the Rocky Mountains. University of New Mexico Press 1967 ISBN 0-8623-0343-9
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.

[92] Balls. E. K. Early Uses of Californian Plants. University of California Press 1975 ISBN 0-520-00072-2
A nice readable book.

[95] Saunders. C. F. Edible and Useful Wild Plants of the United States and Canada. Dover Publications 1976 ISBN 0-486-23310-3
Useful wild plants of America. A pocket guide.

[160] Natural Food Institute, Wonder Crops. 1987.
Fascinating reading, this is an annual publication. Some reports do seem somewhat exaggerated though.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.

[188] Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. 1990 ISBN 0-86318-386-7
Excellent range of photographs, some cultivation details but very little information on plant uses.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

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Bibliography

Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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We make no claims of magical effects or supernatural powers for any item in this catalog. In spite of legendary attributes or occult and craft tradition, such items are offered as curios only and beliefs concerning their magical effectiveness are related only for historical interest.