Edwardsia chrysophylla Salisb.
Common Name: Mamane
Sophora chrysophylla varies in habit according to the habitat in which it grows - at lower elevations it is a deciduous tree growing 6 - 15 metres tall, but in poor soils or at the higher levels of its range it can be a shrub just 1 metre tall. The bole can be up to 60cm in diameter[
The tree is harvested from the wild for local use of its wood.
North central Pacific - Hawaii.
Dry shrubland and forest to mesic or rarely wet forest, formerly in subalpine vegetation from sea level, but more commonly from 450 - 3,240 metres on most main islands of Hawaii[
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A plant of the tropics, it is found growing at elevations from near sea level to more than 3,000 metres[
Requires a sunny position[
The tree is exceedingly deep rooted[509.
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[
The wood is extremely hard and very durable in the soil[
]. It is widely used for fence posts and for thatching poles up to a 5cm in diameter[
]. It is used locally for sledge runners[
The wood makes a good fuel[
Seed - is easy so long as they are pre-treated. Soak them for 12 - 24 hours in warm water, until they show signs of swelling. If they have not swollen by this time, carefully abrade the seed coat, being careful not to damage the seed within. The seed should now swell up within a few hours in water. Sow them in a nursery seedbed or individual containers in a semi-shaded position and germination should take place in 1 - 2 weeks. Young plants grow away vigorously and can be planted out when they are 20cm tall[
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