ORCHIDACEtE 



Petals about 3.1 cm. long, 5.5 mm. broad, linear, rounded at the 

 slightly oblique, often truncated, irregular apex, three- to five- 

 nerved. Lip three-lobed at about four-fifths the distance from 

 the base, obovate in outline when spread out, about 3 cm. long, 

 2.3 cm. broad across the lateral lobes; lateral lobes broadly semi- 

 obcordate, irregularly erose-crenulate on the apical margin; mid- 

 dle lobe transversely oblong or reniform, erosulate, retuse, apicu- 

 late, abruptly and strongly convex in the center due to the con- 

 verging of two papillose keels which are greatly reinforced by 

 approximate verrucose ridges starting from the lateral sinuses, 

 and by verrucose papillae which spread radially toward the mar- 

 gins. Two long low slender keels crowded with digitate papillae 

 run from the base of the lip to the apical lobe, where they con- 

 verge ; a similar but very short keel on either side at the base. Col- 

 umn about 1.7 cm. long, arcuate, clavate in outUne because of 

 the rather broad wing, with the apex broadly rounded and irreg- 

 ularly blunt- toothed. Rostellum very small, reflexed. Clinan- 

 drium prominent, ovate, reflexed, with revolute margins. 



This plant is very distinctive and showy and is a rather near 

 ally of Coelogyne Dayana Reichb. f. It differs, however, in the 

 short scape, much larger flowers, and more papillose mid-lobe. 

 (Plate 81.) 



KiXABALU, Hadam, July-August 1916. Pakka, Clemens 200 (Type), 

 November 1915. Flower white and yellow. 



13. Coelog-yne rigidiformis A.S^S. sp. nov. Rhizoma eras- 

 sum, lignosum. Radices numerosae, fibrosae, ramosae, crassae. 

 Pseudobulbi cylindracei vel anguste pyriformes, monophylli. Fo- 

 lium oblongo-lineare, ad apicem basimque angustatum, compli- 

 cato-mucronatum, valde plicatum, rigidum, erectum, coriaceum. 

 Petiolus cylindraceus. Inflorescentia heterantha. Pedunculus 

 erecto-patens, vaginis nonnullis imbricantibus circa pro parte 



[ 40 ] 



