Thanks Shrikant ji, for the picture. The other species, C.brevispina, is quite different and should not be confused by the yellow band in petals, i learnt. Thanks also to Giby for distinguishing these two species.
Gamble quotes the distribution of C. brevispina as "...usually near the coast" which matches with my observation of this in sacred groves of Tropical Dry Evergreen Forest type (also inhabiting Capparis rotundifolia and C. zeylanica) near Villupuram in TN. So its presence in MH (evergreen forests?) needs to be verified i think. This sp is not dealt by Cooke.
Dinesh ji, according to Gamble there are 4 species dealt in FPM having white flowers with yellow tinge, that confused us. (pl note Shrikant ji's observation is 'pale blue' in C. rheedii, a form of cultivated one?) I would like to know from where you photographed those pictures. Like us, Wallich and Hooker were also confused this but to C. zeylanica.
Vijayasankar RamanNational Center for Natural Products Research
University of Mississippi