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Euphorbiaceae FAMILY

Euphorbia antisyphilitica

Euphorbia antisyphilitica

Edibility
2/5
Medicinal
2/5

Safety & Hazards

The sap contains a latex which is toxic on ingestion and highly irritant externally, causing photosensitive skin reactions and severe inflammation, especially on contact with eyes or open cuts. The toxicity can remain high even in dried plant material[1]. Prolonged and regular contact with the sap is inadvisable because of its carcinogenic nature[2].

Cultivation Details

HabitEvergreen Shrub
Growth—

Euphorbia antisyphilitica is native to the arid and sub-arid regions of southwestern N. America. One report says that this plant is hardy to zone 8, which means it can survive short periods with temperatures down to around -5 to -8°c)[1]. Another report says that minimum winter temperatures of 8 - 10°c are ample for the plant to survive[3]. What is also important is to ensure the plant is in a very well-drained soil and is in an area with little winter rainfall. Prefers a light well-drained moderately rich loam in an open position[1]. Requires ample water in the growing season but very dry conditions in the winter[3]. Hybridizes with other members of this genus[1]. The ripe seed is released explosively from the seed capsules[1]. Members of this genus are rarely if ever troubled by browsing deer and rabbits[4]. This genus has been singled out as a potential source of latex (for making rubber) for the temperate zone, although no individual species has been singled out[5].

Propagation

Seed - sow spring in a warm 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 winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Cuttings can be taken throughout the growing season. Leave them to dry and callus for 2 weeks before potting them up[3]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Euphorbia+antisyphilitica>

Pollinators

Insects

References

  1. [1]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · 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.
  2. [2]The New Plantsman. Volume 1, 1994. — Matthews. V. · Royal Horticultural Society · 1994 · ISBN 1352-4186 ↩︎A quarterly magazine, it has articles on Himalayacalamus hookerianus, hardy Euphorbias and an excellent article on Hippophae spp.
  3. [3]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
  4. [4]Perennial Garden Plants — Thomas. G. S. · J. M. Dent & Sons, London. · 1990 · ISBN 0 460 86048 8 ↩︎A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.
  5. [5]Alternative Enterprises for Agriculture in the UK. — Carruthers. S. P. (Editor) · Centre for Agricultural Strategy, Univ. of Reading · 1986 · ISBN 0704909820 ↩︎Some suggested alternative commercial crops for Britain. Readable. Produced by a University study group.
  6. [6]Flora of N. America — http://flora.huh.harvard.edu/fna/ ↩︎An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
  7. [7]Mansfeld's Database of Agricultural and Horticultural Plants — http://mansfeld.ipk-gatersleben.de/pls/htmldb_pgrc/f?p=185:3:4292127278597336 ↩︎Terse details of a huge range of useful plants.
  8. [8]Dictionary of Economic Plants. — Uphof. J. C. Th. · Weinheim · 1959 · ISBN - ↩︎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.
  9. [9]A Dictionary of Plants Used by Man. — Usher. G. · 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.
  10. [10]The Herb Book. — Lust. J. · Bantam books · 1983 · ISBN 0-553-23827-2 ↩︎Lots of information tightly crammed into a fairly small book.
  11. [11]Plants for Man. — Schery. R. W. ↩︎Fairly readable but not very comprehensive. Deals with plants from around the world.
  12. [12]Economic Botany. — Hill. A. F. · The Maple Press · 1952 · ISBN - ↩︎Not very comprehensive, but it is quite readable and goes into some detail about the plants it does cover.