Can this be called semi alba?

[baodai]

one is little bit lighter than the other one, Can it be semi alba?
Thanks,
BD

 

[Pete]

certainly not. the term semi alba as i understand it refers to an albino flower (white) with a colored lip. there are all kinds of "albas" though; things that are albinistic, fully albino, flavums, albescens etc...
it is really nice to see the range in colors of this species. beautiful flowers you have.. some taxonomists wouldnt hesitate a second to put a varietal name on the different variety. others like myself would just say, its a light one, a dark one.. etc

 

[baodai]

Thanks Pete,
BD