"semialba" forms
hey,
unfortunately the term "semialba" is not exactly defined, but most times it is a white flower with colored lip/pouch or "color splash" on the sepals or petals.
but never it is a "pale rose" flower, which also in other plants is a factor of temps.
in reginae there are known some forms with pure white sepals, petals, pouch, but have some pink spotting INSIDE the pouch.
maybe THIS is "semi alba"
and I have seen a pic of reginae, which could be called "semialba",
but Planteck.com named this much more "intelligent" as "cv. fuchsia" according to the fuchsia color on part of the pouch
here are some pics from my Cyp. ulla Silkens, where the influence of the temp can be seen. the 3 pics show the SAME plant!!
this is the same factor of temp as known from Cyp. reginae.
so at least FOR ME, the term "semialba" is nothing but a "tric" of the owner of a plant to catch for interrest.
I think, that it cannot be a "goal" of a breeder to cross a white and a pink in order to receive a "pale pink"
the only reason to do that is, to get seeds from a pure white,
which is "self infertile" and this way maybe "produce some pure white progeny".
best wishes
dieter