suborbicular; midlobe from a prominent isthmus transversely 
reniform, emarginate, up to 3.5 cm. wide and 2.8 cm. long 
including the base. Pseudobulbs somewhat compressed, round 
to ovate, spaced remotely on slender, wiry growths. Peduncle 
either lateral from base of pseudobulb or from developing 
plantlet, usually single-flowered but specimens have been seen 
with several-flowered, fractiflex rachis; the largest pseudobulb 
up to 3.5 cm. long with a leaf up to 10 cm. long. 
DISTRIBUTION: Costa Rica south to Bolivia. 
Oncidium Harlingii Stacy, sp. nov. 
Type: Ecuador; Gualaceo 30 K. West of Limon, growing on 
ground among moss at 2300 m., HARLING 12835! 
(GB). 
Epiphytica, erecta, simplici vel ramosa; pedunculis, 
teretibus, satis rigidis, multi-articulatis, vaginis ad-pressis, jam 
emarcidis, internodiis sesquipollicaris subaequilongis vestiti; 
pseudobulbis valde distantibus, leviter compressis, ovoideo- 
lenticularibus, vaginis distichis, foliiferis omnino obtectis, un- 
ifoliatis, usque ad 2 cm. altis; foliis in exsiccatione satis 
papyracels, Ovato-lanceolatis, acutis vel subacuminatis, basin 
plus-minusuve petiolatis, petiolo usque ad 1.5 cm. longo in- 
cluso usque ad II cm. longis, 2.5 cm. latis; inflorescentiis 
abbreviatis, 1-3 floris; bracteis cucullato-lanceolatis, 
acuminatis, Ovariis pedicellatis brevioribus; floribus con- 
spicuis; sepalo postico obovato-elliptico, obtuso, paulo con- 
vexo, usque ad 8 mm. longo, 5 mm. lato; sepalis lateralibus 
inter se breviter connatis, patulis, ovato-oblongis, acutis, 
usque ad 10 mm. longis, 4mm. latis; petalis quam sepalis multo 
majoribus, ovato-ellipticis obtusis vel rotundatis, usque ad 12 
mm. longis, 7 mm. latis; labello sessili, basin utrinque au- 
riculato, subrotundo, deinde in laminam transverse renifor- 
mem, antice emarginatam seu bilobam expanso; disco basin 
callo triquetro, tota superficie minutissime muricato ornato; 
toto labello 26 mm. longo, 30 mm. lato, basin 11 mm. lato; 
columna humill, juxta stigma auriculata, auriculis oblique sub- 
quadratis; ovario pedicellato cylindrico, usque ad 2 cm. longo. 
Observation: O. Harlingii is readily separated from the other 
58 
