This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
These are handsome Leguminous plants with large Laburnum-like leaves and bright-red Pea-like flowers. They flourish in rich loamy soil, and are raised from seeds and cuttings. E. Crista-galli, from Brazil, has thick rootstocks and stems 4-6 ft. high, produced annually; E. herbacea has long arching racemes of flowers, and E. Humeana, from South Africa, is a bush, 8-10 ft. high, with long racemes of scarlet blossom. They all flourish in a warm greenhouse. E. Parcelli and E. marmorata like warmer treatment, and are remarkable for the pretty variegated leaves.