Luisia trichorrhiza (W. J. Hook.) Bl., was observed to exhibit intraspecific colour variations in its natural populations of West Bengal.
Variations were observed in floral part such as sepals, petals, and lip. The normal floral colour was yellowish green with purple lip. The plant
that showed variations was observed with flowers having purple blotch on pale yellow lip. All other floral parts were more or less equal in
size but pedicellate ovary was larger in size. The local availability status of this species is common and the status of variant species is rare.
Its natural populations in the nature have drastically reduced as compared to earlier times when these plants were abundantly available
in Terai and Dooars (foot hills of Himalayas) region of West Bengal. The factors including urbanization, construction of roads and dams etc.
seem to be the major cause of habitat destruction of the species, in the region. Hence, conservation strategies need to be developed so
as to save the species, in its natural habitats.