N1<:\V OR NOTEWORTHY ORCHIDS 
nerves branched. Labellum 2 mm. long, about 1 mm. wide 
above the middle, pandurate (sometimes with porrect 
lobules, one on each side near the base), broadest above the 
middle, sometimes bluntly apiculate, fleshy, deeply concave 
or saccate at the base in front of the column. Column less 
than 1 mm. long, stout, ebrachiate. 
Acoridium marginatum is most closely allied with A. 
rhombophorum (Reichb. f.) Ames, from which it differs in 
having much larger flowers and a very different labellum. 
From A. irigense Ames it is readily separable by the leaves 
being distinctly marginate. [Fig. 5.] 
Piiii.ippiNKS, Luzon, Rizal Province, Mount Irig, 
M. Ramos s. n., April 19, 1922. Epiphyte on trees, flowers 
yellow. 4900 feet altitude. (Type in Herb. Ames No. 
26137.) 
Acoridium mindanaense Ames sp. nov. Radices 
fibratae, ramosae, glabrae. Pseudobulbi graciles, semi- 
fusiformes, in sicco flavidi, corrugati, monophylli. Folium 
angustc lineare, obtusum, apice breviter apiculatum, nervo 
medio subtus prominenti. Pedunculus filiformis, ascendens, 
usque ad racemum nudus, folium excedens. Racemus ar- 
cuatus, distichillorus, pergracilis, multiflorus. Bracteae 
raccmi glumaccac, ovarium pedicellatum multo supcrantes, 
subtilitcr nervosae, margine leviter involuta, rotundato- 
ovatae. Sepala lateralia bene lanceolata, acuminata, valde 
acuta, membranacea, uninervia, basi rotundata. Se )alum 
dorsalc lanceolatum, acuminatum, acutum, per medium 
uninervium. Pctala similia sed minora. Labellum triloba- 
tum; lobis lateralibus subcllipticis, valde obtusis, erectis, 
propc basim lobi utriusque callo papilloso triangulo in- 
structis; lobo medio cuneato, antice apiculo triangulo 
instructo. Discus leviter saccatus, in depressione disci callo 
papilliform!. Columna generis. 
Epiphytic herb, 20 cm. tall to tip of the raceme. Roots 
fibrous, 10 cm. or more long, branching, smooth. Pseudo¬ 
bulbs about 1.5 cm. long, when young concealed by closely 
oppressed sheaths which soon break down into spreading 
fibres, semifusiform, yellowish when dry, wrinkled longi- 
25 
