Erythrina × bidwillii
Erythrina × bidwillii
Safety & Hazards
All Erythrina species contain greater or lesser amounts of toxic alkaloids - these can be found in all parts of the plant but are usually most concentrated in the seeds. Concentrations vary from species to species, in some it is low enough that the plant is safely used as a food. In many, the alkaloids are utilized for their medicinal effects. We have no specific information on the concentration of the alkaloids in this species, but care should be exercised in any use of the plant that involves ingestion. These alkaloids have a curare-like action (obtained from Strychnos species) and can cause paralysis and even death by respiratory failure[1, PFAF].
Cultivation Details
Erythrina x bidwillii is not very cold tolerant. The rootstock can tolerate temperatures down to about -10°c when the plant is dormant, provided the stem bases are thickly mulched with organic matter such as leaf litter or sawdust and covered with bracken[2]. The top growth can be killed by all but light frosts, but new growth should sprout from the rootstock in spring and this will flower in late summer[2]. Requires a moderately fertile well-drained soil in a very sunny position[2]. Best if given the protection of an east, south or south-west facing wall[2]. Plants take 3 - 4 years to flower from seed[2]. 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[2].
Propagation
Seed - pre-soak for 12 hours in warm water and sow spring 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 winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Cuttings of half-ripe wood, mid summer in a frame[2]. Overwinter in a greenhouse and plant out in late spring or early summer. Heeled cuttings of young growth in the spring in a frame[2]. Overwinter in a greenhouse and plant out in late spring or early summer. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Erythrina+%C3%97+bidwillii>
Pollinators
Birds, Insects
References
- [1]The Leguminosae; A Source Book of Characteristics, Uses and Nodulation — Allen O.N.; Allen E.K. · University of Wisconsin · 1981 · ISBN 0-333-32221-5 ↩︎An amazing and comprehensive work, giving a brief guide to the many genera of the family Fabaceae and also the principle uses of the genus.
- [2]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.
- [PFAF]Plants for a Future — pfaf.org ↩︎