I just recieved a bulb. echinolabium in the mail. Three of the leaves are wavy, and one is sort of crinkled. They are all green, though. One other leaf on a small bulb is yellowing at the tip. Should I replace it?
Hmm... I don't have experience with bulbos, but know that in some other genera (notably Onc alliance) get pleated, crimped foliage from underwatering, or the inability to take up water due to little or no good roots ... have you checked the roots?
Hopefully others with Bulbo experience will chime in!
Yellowing may be too much light or just an older leaf prepping to drop, in my humble opinion. I'm not an expert on these though. I'd also second the water comment above in relation to the crinkled leaves.