ORCHIDACE.E 



longum, circiter 9 mm. latum. Racemi brevissimi. Flores singuli, 

 viridi-lutei, labello purpureo, 1.5 cm. longi cum men to. Pedicel- 

 lus subgracilis. Sepala lateralia oblique triangularia, acuta, cum 

 mento 12 mm. longa, 4.5 mm. lata. Sepalum dorsale ovatum, acu- 

 tum, 5 mm. longum. Petala oblonga, acuta, 5 mm. longa, 2 mm. 

 lata. Labellum 14 mm. longum, trilobatum, lobo medio triangu- 

 lari-bifido, a basi lineari-cuneatum; lobi laterales quam lobus me- 

 dius multo minores, rotundati, 1 mm. longi, 1.5 mm. lati; lobus 

 medius profunde forcipatus, ambitu orbicularis, e lobis laterali- 

 bus isthmo oblongo separatus, lobuli semiovati, 3.5 mm. longi, 

 2.5 mm. lati, isthmus 3 mm. longus, 2.5 mm. latus. Lamella? in 

 disco dua?, ad medium isthmi valde curvata?. Mentum 7 mm. 

 longum. Gynostemium crassum, utrinque unidentatum. 



Dendrobium pseudoconvexum is much smaller in the flowers 



than D. inter jeclum Ames. Habitally they are very similar. In both 



species the lamellae are sharply bent to form a crescent on the 



isthmus which separates the lateral lobes from the terminal one. 



The lobules of D. pseudoconvexum are twice as wide as those of 



D. interjectum. 



Luzon, Laguna Province, San Antonio, Maximo Ramos Bur. Sci. 15075, 

 June 14, 1912. Ramos Bur. Sci. 16567, September 16, 1912. Mount 

 Mariveles, F. W. Foxworihy Bur. Sci. 3013, April, 1907. Leaves longer 

 than in the type, up to 1 dm. long, 13 mm. wide. 



61. Dendrobium purpureostclidium sp. nov. Aff. D. parieti- 

 formi J. J. Smith. Caules ramosi, elongati, penduli, usque ad 

 25 cm. longi, lutei, nitidi, circiter 1 mm. in crassitudine, teretes. 

 Pseudobulbi circiter 1.5 cm. longi, cylindracei, in sicco rugosi, 

 lutei, nitidi 2 mm.indiametro, monophylli, in caulibus distantes. 

 Folium lanceolatum, rigidum, coriaceum, marginatum, in sicco 

 in longitudinem leviter sulcatum vel nervosum, 3-4 cm. longum, 

 7-9 mm. latum, acutum. Flores singuli, succedanei, ex axilla folii 



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