Ames — New Species of Acoridium from the Philippines. 145 



sition between the filamentous-leaved A. tenellum and the broad-leaved A. 

 vmustulnm and A. pumilum forms of the section Euacorldima. The fleshy 

 flowers, which are nearly opaque, and the very complex lip of ^. gramlni- 

 folinm distinguish it very clearly from its near allies. The character of the 

 lip is worthy of special attention as the structure of the calli is more like 

 that of the calli of A. venushihnn and its allied species than like the calli 

 of .1. tenellum, thus forming a striking transition between the two groups. 



Acoridium tenuifolium sp. nov. 



Pseudobulbi fusiformes ; folia linearia, attenuata, acuta ; pedunculi quam 

 foliis breviores ; sepala lateralia triangulari-lanceolata, acuta, 1-nervia ; 

 petala lanceolata, 1-nervia; labellum 3-lobatum, 3-callosum, lobis latera- 

 libus valde elongatis, oblongis, obtusis, 1-nerviis, lobo medio minuto. 



Pseudobulbs fusiform, slender, 1.5-2.5 cm. long, raonophyllous. Leaves 

 linear, acute, with a prominent mid-rib, 3-12 cm. long, 2-4 mm. wide, con- 

 tracted below into a slender petiole 1.5 cm. long. Peduncle exceeded by 

 the leaf, flexuose, 3.5-5.5 cm. long to the lowermost bract of the inflorescence, 

 bracts 2 mm. long, longer than the ovary. Flowers white, less than 2 mm. 

 apart. Lateral sepals triangular lanceolate, 1-nerved, acute, 3 mm. long, 

 1 mm. wide. Upper sejial 3 mm. long, similar to the laterals. Petals 

 lanceolate, 1-nerved, 2 mm. long. Lip minute, 3-lobed with relatively long 

 lateral lobes, which are erect, oblong, obtuse, and diverted forward, at right 

 angles to the colunm ; the saccate middle lobe, which is fleshy and pro- 

 vided with a pitcher-like tip at the apex, passes at its basal margin, or rim, 

 into thickenings, or calli, one on each side at the sinus formed by the 

 lateral and middle lobe ; lateral lobes from sinus to apex, 1 mm. long, 

 1-nerved. 



Type from Mt. Data, Distr. Lepanto, Luzon, alt. 7,000 ft., epiphyte in 

 rain forest, October 29, 1905, Elmer D. Merrill (No. 4576). 



While Acoridium tenuifolium is closely allied to A.tenue and A. parvulum, 

 it is very distinct from both, and well characterized by its oblong, 1-nerved 

 lateral lip-lobes and by its acute, attenuated leaves. 



Acoridium tenue sp. nov. 



Pseudobulbi fusiformes; folia lineari-oblonga, obtusa ; pedunculi quam 

 foliis cum petiolis breviores, vel interdum longiores; sepala lateralia lineari- 

 lanceolata, acuminata, acuta, 3-nervia; petala lineari-lanceolata, acuminata, 

 acuta ; labellum 3-lobatum, 3-callosum, lobis lateralibus lunatis, sub-acutis, 

 lobo medio 3-dentato, dentibus lateralibus magis rotundatis, obtusis vel 

 snb-acutis. 



Whole plant when in flower 12-18 cm. high, slender throughout. 

 Pseudoliulbs 1.5-2.2 cm. long, fusiform, when immature concealed by the 

 tubular, nervose, acute sheaths. Leaves linear-oblong, obtuse, with a 

 minute indentation on the margin on each side above the middle, prom- 

 inently 3-nerved, 3-6 cm. long, 2-4.5 mm. wide. Petioles slender, 1 cm. 

 long. Peduncles filiform, shorter than the leaf and petiole or sometimes 

 slightly longer, 4.5-8 cm. long. Bracts longer than the ovaries, erose-den- 



