ORCHIDACE.E 



9. Oberonia luzonensis sp. nov. Radices fibratas. Caules elongati, 

 graciles, usque ad 1.5 dm. longi, foliis imbricatis, ensiformibus, 

 ascendentibus, usque ad 7 cm. longis, 3-5 mm. latis. Scapus erec- 

 tus vel subpendulus, gracilis, 7-13 cm. longus. Racemus valde 

 multiflorus, bracteis linearibus subtendentibus. Flores flavidi min- 

 imi, valde aperti, subverticillati. Bracteas inflorescentiaa lineari- 

 lanceolatag, acuminata?, valde acutse, irregulariter dentatae, pedi- 

 cellis Eequilongas, circiter 2 mm. longaa, adpressas. Sepala lateralia 

 divaricata, oblique ovata, acuta, vix 1 mm. longa, circiter .75 mm. 

 lata. Sepalum dorsale simile. Petala lanceolata leviter et irreg- 

 ulariter dentata, vix 1 mm. longa, acuta. Labellum ad basim 

 minute auriculatum, prope medium leviter constrictum deinde 

 cuneatum vel dilatatum, ad apicem profunde retusum, vel apice 

 late emarginato, bilobum; margo irregulariter dentatus. Gyno- 

 stemium brevissimum. Ovarium pedicellatum, tenue, glabrum, 

 1.5 mm. longum. 



In general habit Oberonia luzonensis resembles O. rosea Hook, 

 f. and O. masarangica Schltr., the latter, from Celebes, with nar- 

 rower leaves and looser racemes. Among Philippine species it 

 approaches most closely O. hispidula Ames, from which it is to 

 be distinguished by its looser racemes, smooth ovaries, and more 

 slender habit. O. luzonensis is a variable species in the size of the 

 leaves and stems. The form of the labellum is not dissimilar from 

 that of O. aporophylla Reichb. f. 



Luzon, Province of Tayabas, Guinayangan, L. Escritor Bur. Sci. 20809, 



March 25, 1913. 



10. Oberonia McGregorii Ames in Phil. Journ. Sci. 2 : 321. 

 Mindanao, Luzon, Mindoro. 



11. Oberonia Merrillii Ames in Phil. Journ. Sci. 7 : 9. 

 Luzon. 



[74 ] 



