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Zygopetalum. Orchidaceae.
Sepals and petals nearly alike in form and color, often united to each other at the base, the lateral sepals forming a mentum with the foot of the column; labellum with the lateral lobes scarcely prominent, middle lobe broad and plane, spreading, or recurved at the apex, with a prominent fleshy crest on the disk; column incurved, wingless or with small wings; pollinia 4, not appendiculate.
The Z. Mackaii group grow well under pot culture. One or two species with creeping rhizomes, like Z. maxillare, thrive best on sections of tree fern, osmunda rhizome, or in baskets. A good compost consists of equal parts of chopped sod, peat-fiber and sphagnum moss, well mixed and interspersed with pieces of rough charcoal, about one-half of the pot space being devoted to clean drainage material. After distributing the roots, the compost should be worked in carefully but not too firmly, about them, leaving the base of the plant even with, or just above, the rim of the pot. Repotting should be done when the plants show new root-action. The temperature should range about 60° F. by night and 65° to 70° by day in winter, and in summer as low as possible, with free ventilation during inclement weather. A cool, light location in the cattleya department is favorable. The compost should be kept in a moist condition at all times. The plants are propagated by cutting through the rhizome between the old pseudobulbs at a good eye, potting up the parts and removing them to a rather higher temperature until they start into new growth.
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