ORCHIDACEiE 



acuminata, acuta, trinervia. Labellum vix 2 mm. longum, 3 mm. 

 latum trans basim loborum lateralium, trilobatum, carnosum, 

 ad basim columnae sessile, inarticulatum ; lobi laterales 2 mm. 

 longi, prope apicem circa 1 mm. lati, lateraliter emarginati, basi 

 dilatati et rotundati, apice valde rotundato-obtusi, ecallosi ; lobus 

 medius vix 1 mm. longus, prope apicem 1.25 mm. latus, sub- 

 quadratus, retuso-apiculatus, prope basim leviter constrictus; 

 basis labelli leviter saccata, tricallosa, callis lateralibus crescenti- 

 formibus, callo mediano in depressione disci papilliformi. Co- 

 lumna brevis, incrassata, ebrachiata, 1 mm. longa, rostello pro- 

 minenti. 



A near ally oi A. graminifolium Ames from which it is distin- 

 guished by the very different habit, looser inflorescence and by 

 the middle lobe of the labellum equaling or slightly exceeding 

 the lateral lobes. In dried specimens the flowers are yellowish 

 white with a reddish brown mid-lobe on the labellum. In dried 

 specimens oi A. graminifolium the flowers are uniformly reddish 

 brown. 



Acoridium perplexum Ames is also a closely related species, 



but is different from A. Unearifolium in having the lateral lobes 



of the labellum conspicuously longer than the middle lobe. 



Benguet Subprovince, Mount Boadan, M. Ramos ^ G. Edano 56, Sep- 

 tember 26, 1921. Epiphyte on tree in mossy forest. Flowers white. 6860 

 feet altitude. 



Acoridium perplexum Ames sp. nov. Radices incrassatae, 

 plus minusve 2 mm. in crassitudine, in sicco longi tudinaliter 

 plurisulcatae, albidae. Pseudobulbi aggregati, caespitosi, usque 

 ad 6.5 cm. longi, in sicco anguste cylindracei; juniores vaginis 

 longe tubulatis, usque ad 6.5 cm. longis, in sicco rubidis, arete 

 appressis vestiti ; vetustiores nudi, in sicco plurisulcati. FoUa 

 usque ad 40 cm. longa, usque ad 3 mm. lata, hnearia, acuta, sub- 



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