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 small genus with pinnate or twice-pinnate fronds more or less leathery in texture, having free venation, marginal sori, with the edges of the pinnae in some species bent back to form a spurious in-dusium. Several kinds are grown in small quantities, amongst the most popular being adiantifolia, alaba-mensis,atropurpurea, Calomelanos, cordata and its variety flexuosa; falcata, geranioefolia, gracilis, hastata, intramarginalis, involuta, mucronata, rotundifolia, and terni-folia. The last-named and P. Calomelanos require stove treatment, but the others are easily grown in a greenhouse. Platycerium (Stag's Horn Fern).
These are distinct-looking Ferns with two kinds of fronds - those bearing spores in irregular patches beneath being forked and lobed, while the sterile ones are large, flattish, and imbricating. The best-known kinds are: oethoipicum, alcicorne, biforme, grande, and Willincki (fig. 314), all requiring warmhouse treatment.