ORCHIDACEM 



103 



Labellum with 3 thickened nerves, ecallose, 5 mm. long, 3-lobed, 

 the apical lobe much the largest, 3 mm. long and broad, rounded, 

 blunt and emarginate ; lateral lobes nearly half-round, minutely 

 toothed, obliquely erect. Column rather stout, 2.5 mm. long, 

 apex minutely crenulate, about midway in front a membranaceous 

 protuberance. 



This very distinct species, which clearly shows its affinity with 

 D. Kingii (Hook, f., Icones PL 2015) J. J. Smith and with D. 

 exalatum J. J. Smith, from which it is readily distinguished by 

 its very different labellum, is represented by two collections made 

 by Elmer D. Merrill on Mt. Data, on the island of Luzon. It is 

 a most interesting addition to the group standing between the sec- 

 tions Platyclinis and Acoridium, having the habit of the former 

 and the gynostemium of the latter. 



Mt. Data, Distr. Lepanto, Luzon, November, 1905, E. D. Mer- 

 rill (nos. 4585 and 4858). 



Endemic. 



26. D. PALAWANENSE sp. 

 nov. Pseudobulbi 2.5-3 cm. 

 longi, circa 5 mm. in diametro 

 ad basim, paulatim fastigati ad 

 apicem. Folium 12-15 cm. Ion- 

 gum, 10-17 mm. latum, anguste 

 lanceolatum, subacutum, paulatim 

 in petiolum gracilem, 3-6 cm. 

 longum angustatum. Pedunculus 

 gracilis, flexuosus, pars infra race- 

 mum folio longior, inflorescentiam 

 comparate brevem disticham flori- 

 bus submagnis gerens. Bractew 

 inflorescentice circa 6 mm. longae, 

 lineari-lanceolatae, acutse. Sepala 

 later alia 7 mm. longa, circa 3 mm. 

 lata, 3-nervia, oblongi-lanceolata, acuta. Sepalum dor sale simile. 



DeNDROCHILUM PALAWANENSE 



