146 Ames — Neiv Species of Acoridiumfrom the Philij^ines. 



fate on tlie margin, 2 mm. long. Flowers 2 mm. apart, in slender, gracefnl, 

 flexnose racemes. Racemes 2.7-G.3 cm. long. Lateral sej)als linear-lance- 

 olate, acuminate, acute, 3-nerved, .3 mm. long, 0.0-1 mm. wide. Upper sepal 

 similar to the laterals. Petals narrowly lanceolate, acuminate, acute, 2.5 

 mm. long. Lip 3-lobed ; lateral lobes diaphanous, semi-crescent-shaped, 

 sub-acute, with a free callus-like api^endage at base on the inner margin of 

 each ; middle lobe 0.5 mm. long, tridentate, the lateral teeth rounded, obtuse 

 or sub-acute; near the base of the lip on the median line is a minute 

 tubercle or callus. Column minute, similar to that of A. ieneUum Nees & 

 Meyen. 



Type from the trail to Mt. Apo, Mindanao (growing on mossy trees), 

 April 19, 1904, E. B. Copeland (No. 1019a) ; additional material from Lamao 

 River, Mt. Mariveles, Prov. Bataan, Luzon, October, 1903, Elmer D. Mer- 

 rill (No. 3217a). 



AcorkUumtenue in habit forms a connecting link between the grass-leaved 

 A. gramimfolium and the broad-leaved A. venustulum . The lip, however, 

 is more like the lip of A. tenellnm. 



Acoridium parvulum sp. nov. 



Herbaeminutae ; folia lineari-oblonga, obtusa, truncata ; pedunculi quam 

 foliis longiores ; sepala lateralia lanceolata, acuta, 1-nervia ; petala lanceo- 

 lata, acuta, 1-nervia ; labellum 3-lobatum, 2-callosum, lobis lateralibus 

 oblongo-falcatis, obtusis, lobo medio retuso-mucronato. 



Affinities with A.ktiue. Whole plant not exceeding 8 cm. in height. 

 Pseudobulbs monophyllous, 4-10 mm. long, clothed with tubular acute 

 sheaths. Leaves linear-oblong, obtuse, truncate, prominently 3-nerved, 2- 

 3.5 cm. long, 2-2.5 mm. wide. Peduncles very slender, slightly longer than 

 the leaves, 3-4 cm. long. Raceme graceful, 1.5-2 cm. long, about 3 mm. 

 through. Bracts acute, longer than the ovary, 1.5 mm. long. Flowers 

 when spread out 4 mm. across. Lateral sepals lanceolate, acute, 1-nerved, 

 2.5 mm. long, about 1 mm. wide. Upper sepal similar to the laterals, about 

 3 mm. long. Petals lanceolate, acute, 2 mm. long, 1-nerved. Labellum 

 1.25 mm. wide, 3-Iobed ; lateral lobes oblong-falcate, rounded at the apex, 

 erect, clasping the column ; middle lobe broader than long, the apex re- 

 tuse, mucronate. From the inner basal margin of each lateral lobe a thick- 

 ening, callus-like in its nature, extends to the middle of the middle-lobe, 

 where the two thickenings become confluent. Column minute, with a 

 protuberance in front. 



From Lamao River, Mt. Mariveles, Piov. Bataan, Luzon, October, 

 1903, Elmer D. Merrill (No. 3217?^). 



Acorldiutn parvulum, which is the smallest member of the genus known 

 to come from the Philii)pine Islands, resembles closely A. temie, though 

 this is a larger species, with longer leaves, more slender, longer pseudo- 

 bulbs, longer racemes and narrower, 3-nerved sepals. The leaves of A. 

 purndutii do not taper at the base so abruj)tly as those of A. tenue. No, 

 3217 of Merrill's collections consists of a mixture of A. parvulum and A. 

 tenue. 



