ORCHIDACEJE 



Rhizome ±8 mm. thick, woody, terete, closely invested by thin 

 lance-ovate imbricating sheaths. Roots in separate clusters, 

 ±2 mm. thick, stout, rigid, fibrous, flexuous, sparsely branching, 

 closely brown lanuginose. Pseudobulbs ±19 cm. long, 5 mm. broad 

 at the base but shghtly narrower at the apex, very narrowly cy- 

 lindric, stem-like, diphyllous, in dried specimens apparently dull 

 yellowish -green. Leaves about 25 cm. long, 5 cm. wide, oblong- 

 elliptic, gradually narrowed to each end, acuminate, many-nerved, 

 chartaceous, with seven to nine nerves prominent beneath. Peti- 

 ole indistinct, 2-3 cni. long. Inflorescence synanthous. Peduncle 

 springing from the rhizome at the base of the pseudobulb, up to 

 37 cm. long; part below the rachis ascending, clothed throughout 

 with imbricating ovate to lanceolate thick sheaths with a pair of 

 young leaves emerging at the apex. Rachis slender, irregularly 

 arcuate-reflexed, loosely flowered, glabrous; floral internodes 

 about 1.1 cm. or more long. Bracts about 1.6 cm. long, 1 cm. 

 wide, more or less persistent, ovate, obtuse, rigid, nervose, ap- 

 parently somewhat convolute. Flowers simultaneous, glabrous. 

 Sepals concave-saccate at base. Lateral sepals about 1.6 cm. 

 long, 6.5 mm. wide, oblong-lanceolate, cymbiform, carinate, apex 

 complicate-acute, indistinctly seven-nerved. Dorsal sepal very 

 similar, concave, ecarinate. Petals about 1.6 cm. long, 2.1 mm. 

 broad near the base, narrowly linear, slightly widened above the 

 base and then gradually narrowed, with an acute apex, promi- 

 nently one-nerved. Lip in outline suborbicular,trilobed,±1.4 cm. 

 long and subequally broad; lateral lobes broadly semi-obcordate, 

 rounded at the apex; middle lobe suborbicular from a sessile base, 

 shallowly retuse and bluntly apiculate ; two broad simple fleshy 

 keels extend from near the base of the lip to the anterior third of 

 the middle lobe; on each side parallel to the central keels there is 

 a similar shorter keel which arises near the sinus of the side lobes. 



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