. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1586. Eight months from seed. {Phaius Wallichii.) 1587. A year from the seed. {Cattleya inter media X C. labiata.) 1588. Thirteen months from seed. {Cypripedium.) prove instructive to the botanist and afford infinite pleasure and pastime for the amateur. Diseajics. —Orchids are subject to many diseases. Those h
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1586. Eight months from seed. {Phaius Wallichii.) 1587. A year from the seed. {Cattleya inter media X C. labiata.) 1588. Thirteen months from seed. {Cypripedium.) prove instructive to the botanist and afford infinite pleasure and pastime for the amateur. Diseajics. —Orchids are subject to many diseases. Those having importance from a cultural standpoint and raost troublesome to the grower are known as wet- and dry-rot and spot. Wet-rot is caused by an overmoist or stagnant atmosphere, and is usually first detected by a semi-transparent appearance of the parts affected, which soon become dark brown. It spreads slowly along the tissue. If noticed at the commencement it can be readily checked by slitting the epidermis with a sharp knife and removing tlie plant to a more airy position in the house for a few days. Dry-rot is caused by a fun- gus which attacks the rhizome of the plant. It is often produced through burying the rhizome or base of the plant with compost. Cypripediums are subject to it. Large, healthy growths when attacked quickly show a sickly pale color in the foliage, which, on examination of the base, will be found discolored, and with a light brown appearance. If the portion attacked is quickly removed with a sharp knife it will usually give no fur- ther trouble; otherwise it will travel through the en- tire rhizome and destroy the plant in a very short time. Spot conies from various causes: the appearance of small dark brown spots on the succulent leaves and pseudobulbs is usually an indication of cold and over- watering. Spot also ai'ises through weak tissue, espe- cially in PhalEenopsis, Saccolabiums and Angriecmns during winter, which have been grown too warm, shady
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