ORCHIDACE.E 



gina in fibras soluta vestiti. Folia elliptica vel oblongo-elliptica, 

 2.5-3.5 cm. longa, 8-13 mm. lata, coriacea, apice minute biden- 

 tato et apiculato, basi cuneata, in sicco multinervosa, nervo me- 

 dio subtus carinato. Pedicelli uniflori, singuli vel bini, basi va- 

 ginis in fibras solutis vestiti, in parte superiore vagina tubulari 

 donati. Flos a sepali dorsalis apice ad labelli apicem 1.3 cm. 

 longus, membranaceus. Sepala lateralia oblique semiovalia, 5 

 mm. longa, 2.5 mm. lata trans medium, obtusa, trinervia. Se- 

 palum dorsale lineari-oblongum, 8 mm.longum, 1.45 mm. latum 

 sub apice, acutum, trinervium. Petala tenuiora, anguste rhom- 

 boideo-lanceolata, 3.8 mm. longa, .8 mm. lata, acuta vel obtusa, 

 uninervia, marginibus superioribus serrulatis. Labellum triloba- 

 tum, hastatum, unguiculatum ; unguis basi callo convexo omnino 

 obtectus ; lamina 3.8 mm. longa, 2.5 mm. lata trans lobos latera- 

 les, basi callo magno, convexo; lobi laterales basales, minuti, 

 patentes, ovato-triangulares; lobus medius deltoideus 2.9 mm. 

 longus, 1.8 mm. latus, apice late obtusus, margine ciliata, dimi- 

 dio basali callis duobus remotis. Gynostemium gracile, 3.2 mm. 

 longum, apex alis tribus dentatis praeditus. 



Near allies of this species are Pleurothallis Jimbriata Lindl., 

 which has smaller flowers and secondary stems that are much 

 longer than the leaf, and P. papillosa Lindl. in which the label- 

 lum and petals are entire. P. josephensis Rodr. is similar in habit, 

 but is more robust in all its parts. 



Trinidad, B. W. I., Valencia, N. L. Britton,E. G. Britton ^ T. E. Hazen 

 1026, March 1920. On forest trees. 



Pleurothallis YWto^zoQ^ix Ames sp.nov. Herba epiphytica. 



Rhizoma abbreviatum, radicibus numerosis, albidis, filiformibus. 



Caules caespitosi, approximati, prope basim uniarticulati et ni- 



gromaculati et vaginis duabus tubularibus arete cincti. Folium 



ellipticum, apice obtusum, basi cuneato-rotundatum, coriaceum, 



[ 117 ] 



