Phal wilsonii? Phal honghenensis?

Nope, no descriptions. Just my observations on the one's I have. P. wilsonii does smell
very good and sweet, but the fragrance of modesta is quite different and very grape
koolaid. There's no mistaking that grape smell for anything else and it's very strong.
P. wilsonii has a delicate fragrance. P. modesta grabs your nose and twists it. I have
two modesta in bloom right now and the whole gh smells like a kid's birthday party!

 

FWIW, that plant was purchased as stobartiana, but was later acknowledged by the seller as not being that.

It is tiny and deciduous, so I am leaning toward honghensis

 

So can anyone here give a definitive answer as to how these species are delineated?

 

I got an answer for the difference between wilsonii & honghenensis from some guy at Redland! He was selling both species, and he sounded like he knew what he was talking about. So I'm gonna go with his explanation. Wilsonii & honghenensis are identical except for the contour of the wilsonii lip kind of looks like a "w". Like the photo Ray posted. Honghenensis, on the other hand, doesn't have the "cleft" lip, so it's shaped more like a "u".

 

Seems like there are a lot of Phals that get confused. I bought something that was labeled Phal braceana, but was told by someone who should know that it was wilsonii based on the flowers. It does have sort of a W-shaped lip, but doesn't smell like grape kool-aid. It's semi-deciduous like the other Phal wilsonii that I have, losing its leaves if it gets too hot or cold.

 

I do love this orchid family and I also sometime confuse about this two species. I observe this species both in the wild and in "captivities" and I found of different thing between this two species is spike and the petals. One species that I call wilsonii have thin spike and the petal also thin and the other for honghenensis have more round petal and usually a bit bigger than the other.
Some one can correct me if I'm wrong.