Alba and semi-Alba

Alba refers to a plant lacking in coloring pigments, meaning it will be white and/or green in a plant in which the type species has color.
Semi-alba is used to refer to a flower mostly meeting those same criteria, but the lip still is colored.

Example  Dendrobium parishii

Dendrobium parishii

Dendrobium parishii  (Normal Form has colour)

dendrobium parishii alba

Dendrobium parishii  -Var alba

(refers to a plant lacking in coloring pigments, )

Den. parishii var. semi-alba.

Dendrobium parishii  -Var Semi alba

( Semi-alba is used to refer to a flower lacking colouring pigments, but the lip still is colored.)

Dendrobium parishii semi alba Black pearl

Dendrobium parishii  Var semi alba “Black pearl”

( Semi-alba is used to refer to a flower lacking colouring pigments, but the lip still is colored In this case lip is another colour.)

seidenfadenia-mitratap

seidenfadenia-mitrata ( Normal Form has colour )

seidenfadenia-mitrata-var-alba-sp

seidenfadenia-mitrata var-alba

(refers to a plant lacking in coloring pigments, )

Klairvoyant orchids

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