ORCHIDACE.E 



elongated tubular sheath that conceals the petiole of the leaf and 



the base of the peduncle. 



Luzon, Kalinga Province, George Boettcher, March 19, 1918. 1000 me- 

 ters altitude. Flowers white. 



Dendrochilum ( § Platyclinis) propinquum Ames sp. nov. Ra- 

 dices fibratae, elongatae. Rhizoma repens. Pseudobulbi 2.5-3.3 

 cm. longi, anguste pyriformes, approximati, superne attenuati, 

 monophylli, juniores vaginis tubulatis acutis pseudobulbum su- 

 perantibus inclusi, insicco valde rugosi. Folium petiolatum, 17-20 

 cm. longum, circa 3 cm. latum, oblongo-lanceolatum, utrinque 

 attenuatum, nervosum, subacutum, nervo marginal! utrinque ad- 

 dito, medio subtus multo magis prominenti, lamina folii coriacea. 

 Petiolus sulcatus. Pedunculus folio fere explanato synanthus 

 eoque fere duplo longior, nutans, subdensiflorus. Racemus gra- 

 cilis, 12-16 cm. longus. Bracteae inflorescentiae circa 5 mm. 

 longae, convolutae, glumaceae, ovaria pedicellata superantes, ob- 

 tusae, persistentes. Flores distichi, flavidi. Sepala lateralia 4.5-5 

 mm.longa, 2 mm.lata,ovato-lanceolata,subacuta,trinervia,ecari- 

 nata, nervo medio solo subtus prominenti. Sepalum dorsale 5 

 mm. longum, oblongum, obtusum, trinervium. Petala 4 mm. 

 longa, 2.5 mm. lata, cuneato-ovata, obtusa, trinervia. Labellum 

 simile, simplex, 4 mm. longum, 2.5 mm. latum, breviter unguicu- 

 latum, prope basim incrassatum, ad apicem subacutum; discus 

 ecallosus, trinervius, nervis incrassatis. Columna crassa, 1.75 mm. 

 longa, columnae Dendrochili bicallosi similis, lacinia utraque re- 

 ducta in dentem obtusum alae terminali adsistentem, cujus ilia 

 pars fieri videtur; ala terminalis paucidentata. 



Dendrochilum propinquum'i'^ a near ally of Z). bicallosuvi Ames. 

 From this species it differs conspicuously in the ecallose lip which 

 is similar to the petals. 



The structure of the column brings D. propinquum into that 



[ 285 ] 



