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Fabaceae FAMILY

Hedysarum boreale mackenzii

Hedysarum boreale mackenzii

Edibility
2/5
Medicinal
0/5

Safety & Hazards

This species is widely regarded as toxic and warnings about confusing it with its edible cousin Hedysarum alpinum Richardson (Eskimo potato) abound. After exhaustive research, no chemical basis for toxicity could be found. In addition, a critical examination of the literature could find no credible evidence that this species is toxic in spite of these widespread rumours[1].

Cultivation Details

HabitPerennial
Growth—

Hedysarum boreale mackenzii is a native of cold northern latitudes, being found further south only at higher elevations. It can experience very cold winters and dry climates. It is usually found in areas where the mean annual rainfall is in the range 250 - 450mm[2]. It is usually found in areas where competition from other plants is minimal[2]. Grows best in a sunny position, tolerating some shade. Easily grown in most garden soils from clayey to sandy, preferring a deep well-drained sandy loam[3, 4]. It is most often found on moderately saline or alkaline soils in the wild, but will grow on moderately acidic to neutral soils[2]. Established plants are very drought tolerant[2]. Plants strongly resent root disturbance and should be placed in their permanent positions as soon as possible[3]. Does well in the rock garden or border[3]. Plants are quite long-lived, up to 20 years. This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[4].

Propagation

Seed - sow in a cold frame as soon as it is ripe or in the spring[4]. Stored seed benefits from scarification before sowing in order to speed up and improve germination[5]. This can usually be done by pouring a small amount of nearly boiling water on the seeds (being careful not to cook them!) and then soaking them for 12 - 24 hours in warm water. By this time they should have imbibed moisture and swollen - if they have not, then carefully make a nick in the seedcoat (being careful not to damage the embryo) and soak for a further 12 hours before sowing[PFAF]. Prick out the seedlings into individual pots as soon as they are large enough to handle and plant them out into their permanent positions in the summer. Division in spring. Great care is needed since the plant dislikes root disturbance[4]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Hedysarum+boreale+mackenzii>

Pollinators

Bees, Insects

References

  1. [1]Is Hedysarum mackenziei (Wild Sweet Pea) Actually Toxic? — Treadwell E.M. & Clausen T.P. · 2008 · http://www.ethnobotanyjournal.org/vol6/i1547-3465-06-319.pdf ↩︎
  2. [2]Plants Database — United States Department of Agriculture · http://plants.usda.gov/java/factSheet ↩︎An online database with an excellent collection of fact sheets about native N. American plants.
  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]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.
  5. [5]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
  6. [6]Discovering Wild Plants - Alaska, W. Canada and the Northwest. — Schofield. J. J. · Alaska Northwest Books; Alaska · 2003 · ISBN 0882403699 ↩︎A nice guide to some useful plants in that area.
  7. [7]Plants for Human Consumption. — Kunkel. G. · Koeltz Scientific Books · 1984 · ISBN 3874292169 ↩︎An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
  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]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.
  11. [11]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.
  12. [PFAF]Plants for a Future — pfaf.org ↩︎