ORCHIDACE^ 



zontally spreading or arcuate-reflexed. Peduncle up to the ra- 

 ceme clothed with several imbricating nervose sheaths which 

 become fibrous. Racemes 3-4 cm. long. Bracts ±5 mm. long, 

 ovate, rounded and erose at the apex, sulcate, concave, scarious, 

 nervose, reflexed, imbricating. Flowers medium-sized for the 

 genus. Lateral sepals about 4 mm. long, 5 mm. wide,very broadly 

 triangular, very oblique, forming a very deeply saccate mentum, 

 rounded at the apex, prominently carinate, the keel terminating 

 below the apex, three-nerved. Dorsal sepal about 3.5 mm. long, 



2 mm. wide, lance-ovate, rounded and minutely cucullate above, 

 concave, very indistinctly three-nerved. Petals about 3.3-4 mm. 

 long, 1 mm. broad at the base, linear to very narrowly lanceolate, 

 broadly rounded at the apex, indistinctly three-nerved. Lip in 

 natural position parallel with the column, spatulate with the 

 lower part conduplicate on account of the union of the arms of 

 a fleshy hippocrepiform keel which vanishes into the lamina, then 

 abruptly reflexed and dilated into an orbicular blade with two 

 obliquely converging approximate calli in the middle and a mi- 

 nute tubercular callus in the center of the semicircular anterior 

 margin; when extended the blade is oblong, about 6 mm. long 

 and nearly 4 mm. broad across the anterior part. Column about 



3 mm. long, short and stout, ^^dth a conspicuous obliquely as- 

 cending ovate rostellum and with a long unciform foot which 

 has a narrow keel running down the center. 



Vegetative variations are shown by several collections; in 

 Clemens 63 occurs a leaf 12.8 cm. long and 3.55 cm. broad; Clem- 

 ens 222 is a form with very narrow leaves. 



Appendicula pendula Bl. has generally narrower leaves and 

 laxer racemes than this plant and also a lip lacking anterior calli. 

 A. Jhliosa is also unlike A. palustris J. J. Sm. in its shorter 

 broader leaves, larger bracts and pecuhar lip marks. A very close 



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