Oncidium aequinoctiale Stacy, sp. nov. 
Type: Ecuador, without precise locality. Coll. André 
s.n.f (K). 
I. piphytica, usque ad 80cm. alta; radicibus flexuosis, 
glabris; pseudobulbis approximatis, anguste ovoideis, 
unifoliatis, usque ad 5 cm. altis; foliis lineari-lanceolatis, 
acutis vel subacuminatis, usque ad 17 cm. longis, 1.5 
cm. latis; inflorescentils erectis, supra racemosis, laxe 
paucifloris, usque ad 80 cm. longis; floribus satis tenui- 
bus, secundis; bracteis cucullatis, acutis, ovariis pedicel- 
latis multoties brevioribus, 4mm. longis; sepalo postico 
valde concavo, elliptico, obtuso, 11 mm. longo, 6 mm. 
lato: sepalis lateralibus ad tertiam partem apicalem inter 
se connatis, valde concavis, obtusis, usque ad 12 mm. 
longis, 6 mm. latis; petalis obovatis, obtusis, inconspicue 
apiculatis, 11 mm. longis, 7 mm. latis; labello 3-lobo, 
lobis lateralibus divergentibus, ovato-oblongis, lobo in- 
termedio sessili, paululo cuneato, transverse elliptico, 
antice bilobo, utrinque sinuoso; callo satis prominenti, 
3-partito, partitione intermedia retrorse conica; toto la- 
bello 18 mm. longo, basin 14 mm. lato, antice 24 mm. 
lato: columna humili, clinandrio marginato. 
Observation: In floral structures the plants of this new species re- 
semble those of O. nubigenum. It differs from O, nubigenum especially in 
having free lateral lobes forming open, acute to acuminate sinuses with 
the midlobe of the lip; the midlobe is cuneate not cordate at the base. 
Onsidium erosilabium Stacy, sp. nov. 
Type: Ecuador, without precise locality. Cultivated 
by Rodrigo Escobar-R. no. 1879! (AMES). 
K.;piphytica erecta, usque ad 30 cm. alta; radicibus 
flexuosis, glabris; pseudobulbis ovoideis, lateraliter com- 
pressis, usque ad 6 ecm. altis; foliis linearibus, acutis, 
18-25 cm. longis; inflorescentiis gracilibus, paululo arcu- 
atis, paucifloris, usque ad 10 cm. longis; floribus albidis, 
sepalis petalisque pallide brunneo maculatis striatisque, 
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