ORCHIDACEiE 



5. Dendrochilum crassifolium A vies sp. nov. Pseudobulbi 

 monophylli, graciles. Folium rigidum, oblongum, obtusum. Ra- 

 cemus elongatus, multifiorus. Bracteae inflorescentiae gluma- 

 ceae, ovariis pedicellatis acquilongae. Sepala lateralia oblongo- 

 lanceolata, acuta, ad apicem carinata. Sepalum dorsale simile. 

 Petala oblongo-elliptica, acuta, denticulata. Labellum triloba- 

 tum ; lobi laterales denticulati, ad apicem setacei ; lobus medius 

 ovato-lanceolatus, acuminatus, acutus. Gynostemium gracile. 

 Ala apicalis lanceolata, acuta. Stelidia lateralia super basim gy- 

 nostemii orta eique parallela, gracilia, triangularia. 



Pseudobulbs ±1 cm. long, concealed by tubular sheathing 

 bracts, monophyllous. Leaf coriaceous, 8-10 cm. long, about 

 1 cm. wide at the middle, prominently five-nerved when dry, 

 contracted at base into a stout sulcate petiole. Peduncle much 

 longer than the leaves, 19-25 cm. long, the upper half rather 

 densely many-flowered. Below the raceme several empty closely 

 sheathing bracts, otherwise the peduncle is naked, smooth, te- 

 rete. Floral bracts glumaceous, 3-4 mm. long, as long as or longer 

 than the pedicellate ovary. Flowers 3-4 mm. apart. Lateral 

 sepals about 7 mm. long, 2.5 mm. wide, oblong-lanceolate, lightly 

 carinate at the tip, three-nerved. Dorsal sepal similar. Petals 

 about 7 mm. long, 2.5-3 mm. wide, oblong-lanceolate, margins 

 irregularly denticulate, acuminate, acute, three-nerved. Labellum 

 three-lobed, 5.5 mm. long, about 3 mm. wide at the base of the 

 middle lobe; disc bicarinate, the keels extending onto the middle 

 lobe, median vein prominent ; lateral lobes divaricate, triangular, 

 setaceous at the tip, denticulate on the margin to the base of the 

 lip ; middle lobe 3.5 mm. long, ovate-lanceolate or subcordate, 

 acuminate, acute. Gynostemium about 4 mm. tall. Apical wdng 

 entire, triangular-lanceolate, acute, about 1 mm. long. Stelidia 



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