ORCHIDACEiE 



in Bull. Herb. Boiss. 2d ser. 6 : 458 (1906). For a fragment of 

 the type accompanied by analytical drawings I am indebted to 

 Dr. Schlechter. D. Usteri is a member of §Rhopalanthe with 

 terete leaves. In my herbarium this species is represented by 

 several specimens collected by W. S. Lyon on Guimaras Island, 

 between the islands of Panay and Negros. D. Usteri was origi- 

 nally collected in Negros, where it was found growing on man- 

 groves. 



The flowers on my specimens average larger than those de- 

 scribed from the type by Schlechter, the labellum in one flower 

 measuring 1 cm. in length. The lateral sepals and petals resemble 

 the sketches prepared for me by Schlechter, but the upper 

 sepal in my material is narrower than that of the type, measur- 

 ing 8 mm. by 2.5 mm. Mr. Lyon describes the flowers as yellow 

 "veined with pale rosy lines." In outline the labellum suggests 

 D. crumenatum. The pseudobulbs are from 3.5 cm. to 5 cm. long, 

 deeply grooved longitudinally in dried specimens, and are ter- 

 minated by a fleshy terete sharply pointed rigid leaf and by the 

 slender flower shoot. The flower shoot is longer or shorter than 

 the leaf, in one specimen slightly exceeding 1.5 dm. in length. The 

 longest leaf hardly exceeds 8 cm. in length. In the specimens 

 examined the flower shoot exceeds the leaf in five plants and is 

 shorter than the leaf in four. 



Guimaras, W. S. Lyon 137, April, 1909. 



78. Dendrobium Usterioides sp. nov. Herba epiphytica, erecta, 

 usque ad 1 dm. alta; rhizomate valde abbreviato; caulibus vel 

 potius pseudobulbis subfusiformibus, cylindraceis, mox longitudi- 

 naliter sulcatis, vaginis albidis, laxe amplectentibus primum ves- 

 titis, apice unifoliatis 2.5-5 cm. longis, supra medium usque ad 

 7 mm. diametientibus, apicem et praesertim basim versus paullo 

 attenuatis. Folium valde incrassatum,subulatum,± 5 cm. longum, 



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