Caularthron
(pronounced: kawl-AR-thron)
Classification
Epidendreae subtribe Laeliinae
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Overview
Caespitose epiphytes. Pseudobulbs spindle-shaped, hollow. Leaves several, alternate, distichous, leathery, with conspicuous and persistent sheaths. Inflorescences terminal, long-pedunculate racemes, the floral bracts inconspicuous. Flowers white. Sepals and petals free, spreading, subsimilar. Lip unlobed or three-lobed, sessile, +/- high callus keels. Column stout, without a foot, with broad wings; pollinia 4, on individual caudicles.
Etymology
From the Greek kaulos, meaning stem, and arthron, meaning joint, referring to the persistent leaf bases that accentuate the appearance of the nodes.
Distribution
A genus of three species native to Central America, northern South America, Trinidad and Tobago. This genus was long known under the name Diacrium, a name that appears in hybrid combinations such as ? Diacattleya (Diacrium ? Cattleya). In nature the hollo
Care and Culture Card
See basic growing conditions and care information below.
Grow Caularthron in small pots or baskets with a medium-grade epiphyte mixture. Provide warm temperatures, very bright to full light, and regular watering throughout the year. The roots should dry out fully between waterings. Care should be taken to avoid over-potting or too frequent watering as the roots systems doesn’t respond well to disturbance or a decomposed medium.
Literature
Schultes, R. E. 1958. Orchidaceae neotropicales, IV. Notes on the genus Caularthron Raf. Bot. Mus. Leafl. 18:77-102.
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