ORCHIDACE^ 



erosae, per medium longitudinaliter incrassatae. Flores laxe sub- 

 verticillati. Sepala petalaque reflexa. Sepala persimilia, rotun- 

 dato-ovata, obtusa vel subacuta, coneava. Petala oblonga, leviter 

 spathulata, apice late rotundata. Labellum in circuitu triangu- 

 lari-subquadratum,trilobatum; lobi laterales triangulares, obtusi, 

 marginibus lateralibus erosis praediti; lobus medius porreetus, 

 in lobulos oblongos rotundatos patentes ad medium sinu magno 

 divisus. Ovarium hexagonum. 



Plant stemless, caespitose, similar in habit to Oberonia Elmeri 

 Ames and O. Costeriana J. J. Sm. Roots numerous, fibrous, flexu- 

 ous, glabrous, up to 1 mm. thick. Leaves usually five, three well 

 developed and two smaller basal ones, equitant, elongate-linear, 

 closely imbricated at the sheathing scarious-margined base, free 

 portion up to 17 cm. long, 9 mm. thick dorso-ventrally at the 

 middle, strict, acuminate, gently falcate, with a tendency to 

 thicken in development. Peduncle surpassing the leaves espe- 

 cially in age, terminal, gently flexuous-suberect, striate, provided 

 below the raceme with several ascending, narrowly lanceolate, 

 erose bracts. Inflorescence up to 15 cm. long, 1.4 cm. wide in course 

 of development. Rachis glabrous, deeply striate, the apical por- 

 tion (up to 1.6 cm. or more in length) flowerless and provided only 

 with irregular whorls of appressed bracts. Bracts ±3.2 mm. long, 

 narrowly lanceolate, shallowly and irregularly erose, concave, 

 longitudinally thickened down the middle. Flowers loosely sub- 

 verticillate. Sepals and petals reflexed. Sepals very similar, about 

 1.4 mm. long, shortly round-ovate, obtuse or subacute, strongly 

 concave. Petals about 1.5 mm. long, oblong, slightly spatulate, 

 broadly rounded above, upper margins irregularly and very shal- 

 lowly denticulate. Lip triangular-subquadrate in outline, three- 

 lobed, about 2.25 mm. long, at the base nearly 2.25 mm. broad 

 across the lateral lobes ; lateral lobes triangular, acuminate to an 



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