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.
This genus contains the elegant "Snake's Tongue" or "Climbing Ferns", recognized by their climbing stems, conjugate, palmate, pinnate or pinnatifid fronds, forked free veins, extending beyond the margin, and there forming compressed distichous spore-bearing spikelets.
L. japonicum, which is found from the Himalayas to Japan and North Australia, is one of the most popular for market work. L. pin-natifldum is a fine strong-growing species also useful. They both flourish in a rich spongy compost, and require abundance of water during growth and also frequent syringings from May to October. L. japonicum should be treated as a coolhouse Fern, and may, indeed, be grown without artificial heat; but L. pinnatifidum requires warm greenhouse or stove treatment.