Erythrina acanthocarpa
Family: Fabaceae or Leguminosae
What it is like
Erythrina acanthocarpa is a deciduous Shrub growing to 2 m (6ft 7in). See above for USDA hardiness. It is hardy to UK zone 9 and is frost tender. It is in flower from July to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. It can fix Nitrogen. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.
Height (m): 2
Where it is found
Not known
S. Africa - E. Cape province.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 0
Medicine
Rating: 1
The plant is narcotic and purgative.
Narcotic: Relieves pain, induces drowsiness and gives a sense of well-being.
Purgative: A drastic laxative causing a cleansing or watery evacuation of the bowels, usually with a griping pain.
Other
Rating:
Nitrogen Fixer: Plants that fix nitrogen in the soil
How it is grown
Requires a moderately fertile well-drained soil in a very sunny position. Best if given the protection of an east, south or south-west facing wall. Plants are not very hardy outdoors in Britain though they experience at least moderate frosts in their native range and would be worthwhile trying outdoors in the very mildest areas of this country. They can tolerate occasional lows to about -5°c. The stem bases should be thickly mulched with organic matter such as leaf litter or sawdust and covered with bracken. The top growth will be killed by the frost but new growth from the rootstock will flower in late summer. Plants take 3 - 4 years to flower from seed. 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.
Propagating it: 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, July/August in a frame. Overwinter in a greenhouse and plant out in late spring or early summer. Heeled cuttings of young growth in the spring in a frame. Overwinter in a greenhouse and plant out in late spring or early summer.
Best place to grow: Woodland Garden Sunny Edge; Dappled Shade;
Habit: Shrub
Hardiness: 8-11
Growth:
Soil: Light (sandy), medium, heavy (clay)
Shade: Semi-shade, no shade
Moisture: Moist
Things to keep in mind
The plant contains alkaloids that have powerful narcotic and purgative effects. The seeds of all members of this genus are said to be poisonous.