Curly shapes in Eulophia petersii flowers are reserved for areas near tips. The sepals curl back ornately at the top and so do the petal tips over the lip. Smooth sepal margins are whitish in their delicately thin extreme parts.
The cone of the spur below the lip also points straight down before the final bulge of its tip, abruptly bent forward in a shiny, slightly flattened ball. The ragged margins of the frontal lip lobe smoothen into entire lines towards the back on the lateral lip lobes.
A bright green bract can be seen subtending the ovary angled up from the stem (Pooley, 1998; Onderstall, 1984; http://burgersonion.blogspot.co.za).