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(Last Modified On 2/7/2013)
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(Last Modified On 2/7/2013)
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Species
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ONCIDIUM STENOTIS Rchb. f.
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PlaceOfPublication
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Linnaea 41:67. 1877.
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Description
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Erect, epiphytic herbs with approximate, linear-oblong, compressed, longitudinally ridged, monophyllous pseudobulbs 7-14 cm. long and 2.5-4 cm. wide, the lower portions enveloped in the conduplicate, distichously imbricating bases of several bracts the uppermost 3 of which are conspicuously foliaceous. Leaves and bract blades linear-oblong, obtuse to subacute, coriaceous, 15-60 cm. long and 2.5-5 cm. wide, contracted below into very short, conduplicate petioles. Inflorescences 1 or 2 erect or arching, few- to many-flowered panicles up to about 1.5 m. in length, the lateral branches short, usually less than 15 cm. long, the 1 to 5 flowers subtended by thin, white, acuminate, papery bracts. Flowers of moderate size, 3-4 cm. in diameter. Sepals free, subequal, spreading, with recurved apices and undulate margins, yellow heavily blotched with brown, the dorsal sepal oblong-lanceolate, shortly acute to apiculate, 1.3-1.8 cm. long and 0.6-0.8 cm. wide, the lateral sepals linear-lanceolate to lanceolate, acute, obliquely deflexed, the reverse surfaces with a strong central keel, 1.5-2 cm. long and 0.5-0.7 cm. wide. Petals subequal to the sepals and similarly colored, spreading, with recurved apices and undulate margins, lanceolate, acute, 1.4-1.6 cm. long and 0.4-0.6 cm. wide. Lip pandurate, 3-lobed, distinctly shorter than the lateral sepals, 1.2-2 cm. long and 1.2-1.8 cm. wide, bright yellow with a brown isthmus, the lateral lobes shortly clawed at the base, spreading, obovate-spatulate, with subquadrate to sub- orbicular blades, the central portion of the lip contracted into a narrow isthmus, the mid-lobe abruptly dilated, emarginate and 2-lobed, often with a short central apicule, transversely subreniform in outline, about equaling the extended lateral lobes in width, the disk with an erect, fleshy callus, the sides with 2 or 3 short teeth, the apex abruptly tridenticulate. Column up to about 7 mm. long, with 2 rather obscure lateral lobes, the under-surface below the stigma conspicuously thickened into 2 parallel, fleshy lobules.
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Distribution
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Costa Rica and Panama.
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Specimen
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CHIRIQUI: without definite locality, Pring s. n., Pring & Hunter s.n. BOCAS DEL TORO: Water Valley, vicinity Chiriqui Lagoon, von Wedel 1654, 1829, 2156.
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Note
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Allied to 0. Baueri, but apparently always differing in the larger flowers, in which the lip is distinctly shorter than the lateral sepals, and with a conspicuously narrower isthmus. The smaller plants are nearly identical in vegetative appearance with those of 0. Powellii, and have sometimes been mistaken for that species.
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