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(Last Modified On 11/6/2013)
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Species
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Masdevallia dudleyi Luer
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Note
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TYPE: Peru. Dept. of Ayacucho: Prov. La Mar, eastern mas- sif of the Cordillera Central opposing the Cor- dillera Vilcabamba, epiphytic in hepatic forest, along Inca trail between Huanhuachayo and Punccu, 2,920-3,400 m, 23 Aug. 1968, T. R. Dudley 11975 (holotype, MO; isotype, NA), C. Luer illustration 12984.
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Distribution
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Peru
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Description
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Plant medium in size, epiphytic, caespitose; roots coarse. Ramicauls erect, slender, 3-4.5 cm long, enclosed by 2-3 inflated, tubular sheaths. Leaf erect, coriaceous, petiolate, 10-17 cm long including the 3-5 cm long petiole, the blade elliptical, acute, 2- 2.5 cm wide, cuneate below into the petiole. Inflo- rescence a solitary showy flower, borne by a slender, erect peduncle 9-11 cm long, with a bract above the base, from low on the ramicaul; floral bract oblique, 10-12 mm long; pedicel 15-20 long; ovary 7 mm long; sepals white, sparsely dotted with purple, suffused with yellow toward the base, pubescent above the middle, the dorsal sepal obovate, concave, 17 mm long, 10 mm wide, connate to the lateral sepals for 11 mm to form a broad, sepaline cup, the apex obtuse, contracted into a slender tail 29- 31 mm long, the lateral sepals ovate, oblique, 17 mm long, 10 mm wide, connate 10 mm to create a broad, shallow, secondary mentum and a shallow mentum with the column-foot, the apices obtuse, contracted into slender tails similar to that of the dorsal sepal; petals white, oblong, 8 mm long, 2 mm wide, the apex obtuse, bilobulate, the labellar margin with a narrow callus ending in a retrorse process
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Description
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protruding beyond the base; lip oblong, 8 mm long, 3.25 mm wide, the apex broadly rounded, decurved, with three smooth, rounded calli, the disc featureless below the apex, the base subcordate, slightly con- cave, hinged beneath; column semiterete, 7 mm long, the foot 3.5 mm long, including an incurved extension.
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Note
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Etymology. Named in honor of T. R. Dudley, who discovered this species. This species from southern Peru is allied to M. lepida Reichb. f. of the Eastern Cordillera of Co- lombia, and to the widely distributed and variable M. affinis from much of the Andes of Colombia and northernmost Ecuador. Masdevallia affinis is re- placed by prominently purple-striped M. corde- roana Lehm. & Kranzlin in Ecuador. The latter has not yet been reported from Peru. Florally, M. dudleyi is most similar to M. affinis. The gaping flowers pubescent within are mostly white with purple dots. From all the above, M. dudleyi is distinguished by the narrowly oblong petals with a slender marginal carina terminating in a retrorse process that projects beyond the base of the petal, and the lip that is tricallous at the apex.
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