ORCHIDACEffi 



121 



1426). — Mt. Santo Tomas, Benguet, northern Luzon, October 29, 

 1904, R. S. Williams (no. 1948). — Epiphyte, fls. pale greenish, 

 odorless, alt. 6800 ft., Mt. Halcon, Mindoro, November 15, 1906, 

 JE. D. Merrill (no. 5511). — Bosoboso, Prov. Rizal, Luzon, Jan- 

 uary, 1907, Maximo Ramos (no. 2023). 

 Endemic. 



Addendum. — The following species, which has come to light too 

 late for insertion in its proper place, should here be described. 



D. (§ Acoridium) LUZONENSE sp. nov. D. Williamsii Ames 

 valde affine. Pseudobulbi cylindracei, graciles, circa 1 dm. longi, 

 2 mm. in crassitudine, vaginis tubularibus, arete appressis, acutis ves- 

 titi. Folia linearia, 1.3-3.5 dm. longa, 

 acuta, conduplicata, a nervo medio ad 

 marginem 1.5 mm. lata. Pedunculus 

 emergens 2-4 cm. ab apice folii, flli- 

 formis, gerens racemum distichum^oH- 

 bus flavis. Racemus superans apicem 

 folii, 3-6 cm. long us. JBractew inflo- 

 rescentia? 3 mm. longse, obtusse, pedi- 

 cellum brevem et ovarium multo exce- 

 dentes. Sepala lateralia lanceolata, 

 acuminata, acuta, 3-nervia, 3.5-4 mm. 

 long-a, circa 1.5 mm. lata ad basim. 



Sepalum dor sale anguste lanceolatum, 3.5-4 mm. longum. Petala 

 sepalo dorsali similia, 3 mm. longa, aliquantum dentata. Labellum, 

 1 mm. longum, 3-lobatum ; lobi subsequales ; laterales late sub- 

 falcati, erecti, circa 0.5 mm. lati ; medius apiculatus, aliquantum 

 conduplicatus, explanatus subquadratus, ad basim bicallosus. Co- 

 lumna minuta, sectioni propria. 



In habit D. luzonense recalls D. Williamsii, which appears to 

 be its nearest affinity. It differs from that species in the general 

 conformation of the labellum, and in its lanceolate petals. D. 

 graminifolium would seem to be, in the form of the labellum, 



Dendrochilum luzonense 



