PlantPeers
Back to Catalog
No image available
Berberidaceae FAMILY

Mahonia trifoliolata

Mahonia trifoliolata

Edibility
3/5
Medicinal
2/5

Safety & Hazards

All parts of the plant contain the alkaloid berberine - this is most concentrated in the roots, stems and inner bark, and least concentrated in the fruits. In small quantities berberine has a range of effective medicinal applications but, in excess, can cause vomiting, lowered blood pressure, reduced heart rate, lethargy, and other ill-effects. The fruit of most, if not all, members of this genus are more or less edible and can be eaten in quantity since the levels of berberine in the fruit are very low.

Cultivation Details

HabitEvergreen Shrub
Growth—

Mahonia trifoliolata grows wild in the semi-arid, warm temperate zone of southwestern N. America. It can tolerate occasional temperatures falling to around -10 to -15°c, though the young growth in spring is more sensitive and can be damaged by temperatures around 0°c. Unlike most members of the genus, this species requires a dry, perfectly drained position in full sun, a gritty slightly acid soil is best[1]. It does well in a hot, dry position[2]. Succeeds in a good garden soil[3]. A good bee plant[4]. This species hybridizes in the wild with Mahonia swaseyi[5]. Resistant to honey fungus[6]. Some Berberis/Mahonia species (especially Berberis vulgaris) harbour the black stem-rust fungus (Puccinia graminis Persoon). This is a major disease of wheat and barley crops and can spread from infected barberries to the grain crop. The sale or transport of susceptible or untested species of Berberis is illegal in the United States and Canada[5]. This species can harbour the fungus[5].

Propagation

Seed - best sown as soon as it is ripe in a greenhouse[7]. It usually germinates in the spring[PFAF]. 'Green' seed (harvested when the embryo has fully developed but before the seed case has dried) should be sown as soon as it is harvested and germinates within 6 weeks[PFAF]. Stored seed should be sown as soon as possible in late winter or spring. 3 weeks cold stratification will improve its germination, which should take place in 3 - 6 months at 10°c. Prick out the seedlings when they are large enough to handle and grow them on in the greenhouse for at least their first winter. Plant them out in late spring or early summer and consider giving them some protection from the cold for their next winter. Division of suckers in spring[7]. Whilst they can be placed direct into their permanent positions, better results are achieved if they are potted up and placed in a frame until established[3]. Leaf cuttings in the autumn. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Mahonia+trifoliolata>

Pollinators

Bees

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]A Field Guide to Australian Trees. — Holliday. I. and Hill. R. · Frederick Muller Ltd. · 1974 · ISBN 0-85179-627-3 ↩︎A well illustrated and very readable book, but it does not contain much information for the plant project.
  3. [3]Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. — Bean. W. · Murray · 1981 · ISBN - ↩︎A classic with a wealth of information on the plants, but poor on pictures.
  4. [4]Trees of Central Texas. — Vines. R. A. · University of Texas Press · 1987 · ISBN 0-292-78958-3 ↩︎A good concise guide, it gives details of habitats and some of the uses of trees growing in Texas.
  5. [5]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.
  6. [6]The Garden. Volume 112. — RHS. · Royal Horticultural Society · 1987 · ISBN - ↩︎Snippets of information from the magazine of the RHS. In particular, there are articles on plants that are resistant to honey fungus, oriental vegetables, Cimicifuga spp, Passiflora species and Cucurbits.
  7. [7]Propagation of Trees, Shrubs and Conifers. — Sheat. W. G. · MacMillan and Co · 1948 · ISBN - ↩︎A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
  8. [8]Berberis and Mahonia. — Ahrendt. · Journal of the Linnean Society, 57 · 1961 · ISBN - ↩︎Not for the casual reader, it lists all the known species in these two genera together with botanic descriptions and other relevant details for the botanist.
  9. [9]Sturtevant's Edible Plants of the World. — Hedrick. U. P. · Dover Publications · 1972 · ISBN 0-486-20459-6 ↩︎Lots of entries, quite a lot of information in most entries and references.
  10. [10]Growing Unusual Fruit. — Simmons. A. E. · David & Charles; Newton Abbot. · 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.
  11. [11]Edible Native Plants of the Rocky Mountains. — Harrington. H. D. · 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.
  12. [12]Lichens for Vegetable Dyeing. — Bolton. E. · Studio Vista · 1972 · ISBN 0-289-70288-7 ↩︎A small but interesting book for the casual reader and the enthusiast.
  13. [13]Cornucopia - A Source Book of Edible Plants. — Facciola. S. · 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.
  14. [14]Fire Effects Information System — http://www.feis-crs.org/feis/ ↩︎An on-line information site with comprehensive information on over 1,100 species of plant. Mainly developed to supply information on the effects of fire on plants and animals, it also contains a wealth of other information on the plants
  15. [15]Medicinal Plants of the Mountain West — Moore M. · Museum of New Mexico Press; Santa Fe · 2003 · ISBN 0-89013-454-5 ↩︎Detailed information on the medicinal uses of around 150 species of plants from the Rocky Mountains of N. America. An excellent, detailed publication, written in a style that connects the writer to his readers.
  16. [16]The Encyclopedia of Medicinal Plants — Chevallier. A. · Dorling Kindersley. London · 1996 · ISBN 9-780751-303148 ↩︎An excellent guide to over 500 of the more well known medicinal herbs from around the world.
  17. [17]Native American Ethnobotany — Moerman. D. · Timber Press. Oregon. · 1998 · ISBN 0-88192-453-9 ↩︎Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.
  18. [18]A Modern Herbal. — Grieve. · Penguin · 1984 · ISBN 0-14-046-440-9 ↩︎Not so modern (1930's?) but lots of information, mainly temperate plants.
  19. [19]The Herb Book. — Lust. J. · Bantam books · 1983 · ISBN 0-553-23827-2 ↩︎Lots of information tightly crammed into a fairly small book.
  20. [20]The Dictionary of Modern Herbalism. — Mills. S. Y. ↩︎An excellent small herbal.
  21. [21]Encyclopaedia of Herbs and their Uses. — Bown. D. · Dorling Kindersley, London. · 1995 · ISBN 0-7513-020-31 ↩︎A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
  22. [22]The Useful Plants of Great Britain. — Johnson. C. P. ↩︎Written about a hundred years ago, but still a very good guide to the useful plants of Britain.
  23. [23]The medicinal uses of the genus Mahonia in traditional Chinese medicine: An ethnopharmacological, phytochemical and — Jian-Ming He, Qing Mu · 2016 · http://dx.doi.org/10.1016/j.jep.2015.09.013 · ISBN 0378-8741 ↩︎A review of the medicinal uses of the genus Mahonia in China.
  24. [24]Medicinal Plants of China — Duke. J. A. and Ayensu. E. S. · Reference Publications, Inc. · 1985 · ISBN 0-917256-20-4 ↩︎Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
  25. [25]Earth Medicine, Earth Food. — Weiner. M. A. · Ballantine Books · 1980 · ISBN 0-449-90589-6 ↩︎A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.
  26. [26]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.
  27. [27]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.
  28. [28]Meet Flora Mexicana. — Pesman. M. W. · Dale S. King. Arizona. · 1962 · ISBN - ↩︎Very readable flora but rather lacking botanically. A few notes on useful plants.
  29. [29]Nature's Colors - Dyes from Plants. — Grae. I. · MacMillan Publishing Co. New York. · 1974 · ISBN 0-02-544950-8 ↩︎A very good and readable book on dyeing.
  30. [PFAF]Plants for a Future — pfaf.org ↩︎