ORCHIDACE^ 



phylli. Folium ovato-oblongum, acuminatum, basi rotundatum, 

 coriaceum. Flos e summa pseudobulbi post folium exoriens. Se- 

 pala lateralia late ovato-triangularia, acuta, obliquissima, mentum 

 saccatum formantia. Sepalum dorsale ovatum, obtusum. Petala 

 anguste elliptica, subacuta. Labellum in circuitu obovato-ob- 

 longum, trilobatum, e basi ad ultra medium cuneato-flabellatum, 

 deinde abrupte contractum lobos triangulares formans; lobus 

 medius subquadratus, profunde bilobulatus ; carinae duae e basi 

 ad medium lobi medii extendunt. Gynostemium breve, pede lato 

 praeditum. 



Plant about 36 cm. tall from the rhizome to the apex of the 

 erect terminal leaf. Rhizome woody (broken off at the base of 

 the stem). Roots thickly clustered at the base of the stem or 

 occasionally adventitious near all but the lowest nodes, fibrous, 

 flexuous, subrigid, glabrous, up to 1 mm. thick. Stem slender, 

 many -jointed, slightly thickened at the base, rigid, yellow, shin- 

 ing, smooth or somewhat striate-sulcate, the nodes crowned with 

 a narrow black ring, the internodes invested by sheaths which 

 become frayed remnants in course of development. Pseudobulbs 

 produced from the uppermost and two middle nodes of the stem, 

 ±3.5 cm. long, 1 cm. broad, fusiform-cylindric to narrowly pyri- 

 form, monophyllous, yellow, shining, striate-sulcate, when young 

 invested by a sheath. Leaf about 9.6 cm. long, 3.3 cm. wide 

 below the middle, ovate-oblong, acuminate above (point broken 

 off), broadly rounded to a sessile complicate base, coriaceous, the 

 mid-nerve markedly sulcate above and carinate beneath. Flower 

 at the summit of the pseudobulb behind the leaf, rising from a 

 tuft of fibrous bracts, pellucid in the dried specimen. Lateral 

 sepals about 7 mm. long, 8 mm. wide, broadly ovate-triangular, 

 acute at the complicate apex, very oblique, forming a deeply sac- 

 cate mentum below, provided with three more or less distinct 



[99] 



