Key to the Eulophia in section Eueulophia
Plants terrestrial or rarely epiphytic. Pseudobulbs thick, bearing the leaves or the remnants of the sheaths at various levels along the bulbs; leaves 3 or more, caducous on the older bulbs, sides of the most recent bulb articulate, more or less clearly to the sheaths apically, limbus membranous, plicate, graminiform or more or less enlarged.
Key to the Group 1 in section Eueulophia

1a Plants large, to 1 m. tall; leaves to more than 3 cm. wide   
2a Labellum 3-lobed, median lobe oblong, obtuse, neither emarginate nor bilobate; spur not didymous apically  Eulophia wendlandiana
3a Raceme simple, peduncular sheaths appressed; bracts not caducous   
4a Inflorescence paniculate; peduncular sheaths numerous; bracts caducous   
1b Plants smaller; leaves elongated, narrowly linear, petiole obvious, often graminform   
5a Pseudobulbs ovoid, 3-5cm. tall with projecting ridges; labellum obovate-cuneiform, entire, fimbriated-fringed marginally; spur swollen,
saccate apically, contracted basally 
Eulophia macra
6a Pseudobulbs cauliform, often semi hypogynous, not more than 6cm. tall, leaves narrow (6mm. wide at most)  Eulophia ramosa
7a Pseudobulbs fusiform, 1-2-15cm. tall; leaves narrower (12mm. at most)  Eulophia perrieri
8a Labellum provided with 5 long, fringed, linear crests basally; anther provided behind with a 3-homed appendage; plants aphyllous
during flowering, the new pseudobulb and flower spike developing simultaneously, bulb fully developed before flowering 
Eulophia ibityensis
9a Labellum provided with 2 very projecting keels basally, which are attenuate apically; anther provided behind with a bifid appendage;
pseudobulbs developing before flowering, with 5-7 flabeliform leaves 
Eulophia pileate

World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; accessed 25/08/2019