Polystachya (§. Humiles) parva Summerhayes sp. 
nov. ; inter species sectionis floribus parvis, labelli lobo 
intermedio latissime ovato, lobis lateralibus antice in in- 
termedium breviter decurrentibus lamellas altas forman- 
tibus distincta. 
Planta epiphytica, parva, usque ad 8.5 em. alta. Caules 
approximati, basi pseudobulbosi, ad 1 cm. alti, superne 
2-3-(rarius 4-) foliati, basi radices flexuosas emittentes ; 
pseudobulbi ovoidei, leviter compressi, usque ad 7 mm. 
longi et 5 mm. diametro, cataphyllis obtecti. Folia + 
patentia vel recurvata, ligulata vel lanceolato-ligulata, 
apice obtusa, breviter aequaliter vel leviter inaequaliter 
bilobulata, usque ad 8.5 cm. longa, 2.5—7 mm. lata, in- 
feriora valde minora interdum fere ad vaginas redacta. 
Inflorescentia erecta, folia aequans vel superans, simplex, 
1—4-flora; pedunculus 7-13 mm. longus, basi vagina (vel 
rarius 2) circiter 5 mm. longa instructus, ut rhachis bre- 
viter pubescens; bracteae lanceolatae, acuminatae, 1.5-38 
mm. longae. Flores patentes; pedicellus cum ovario 2-3 
mm. longus, pubescens. Sepa/wm intermedium incurva- 
tum, lanceolato-ellipticum vel anguste ellipticum, bre- 
viter acuminatum, 4 mm. longum, 1.8—2 mm. latum, 
concavum; sepala lateralia superne patentia, curvatim 
ovato-triangularia, margine postica prope basin dilatata, 
breviter acuminata, tota 5.5 mm. longa, basi 8.5 mm. 
lata, mentum apice breviter cylindricum rotundatum 
leviter retusum 8.5 mm. longum formantia; omnia sepala 
sparse pubescentia, ut petala pallide viridescenti-alba. 
Petala incurvata, oblanceolata, apiculato-acuminata, levi- 
ter obliqua, circiter 3.5 mm. longa et 1.5 mm. lata, 
glabra. Labellum superne valde recurvatum, e dimidio 
inferiore cuneato distincte trilobatum, totum 5.5 mm. 
longum; lobus intermedius latissime ovatus, apice re- 
curvatus acutus leviter canaliculatus, fere 8 mm. longus, 
circiter 8.25 mm. latus, subearnosus; lobi laterales basi- 
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