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.
A beautiful greenhouse Fern from the East Indies, Assam, etc, often known under the name of Lastrea. It is largely grown for market, and is an excellent plant for winter work. The shining-green, thrice-pinnate fronds are variegated with ivory white or pale yellow along the centres of the pinnae, the colour being improved by exposing the plants to sunlight.