Curcuma species- Bangladesh

yes of course. grant you that, …. let’s see what the professors who actually go on collection tours as part of their official duties have to do and follow.

Attached here KEY to AMADA and HALUD by Sir Prain and Haines

… you are rightly mentioned.
Curcuma L. is one of the charming genus in the family Zingiberaceae, we can easily distinguish the genus from other genera by means of inflorescence, a spike with prominent spiral bracts each subtending a cincinnus of flowers. In fact, it is very difficult to identify the species among the genus. Taxonomical history of the genus revealed that, the pioneer taxonomists (Roxburgh, 1820; Horaninow, 1862; Baker, 1890; Schumann, 1904) were proposed various sections depending on the position of spikes and absence or presence of anther spur. Recently Sabu (2006) revised the family Zingiberaceae in South India along with Costaceae. Depending upon his studies, the major characters used for the identification of Curcuma’sare presence of anther spur, size of the pseudostem, presence or absence of root-tubers, rhizome colour and smell, colour of the coma bracts and proportion of flower with bract (flowers exceeding bract or not). For example, we can easily identify C. aurantica (Syn. C. ecalcarata) from other species my means of the absence of anther spur. Likewise, in C. pseudomontana sessile tubers are absent and in C. vamana and C. oligantha coma bracts are absent. With regard to rhizome colour, rhizome blue within in C. aeruginosa, yellow to deep yellow within in C. zanthorrhiza, deep orange-yellow within C. longa and greyish yellow within C. aromatica. Regard to smell, C. amada rhizome with the smell of green mango. In many species, Curcuma possess lateral and central inflorescence like C. inodora.

Surely this is very useful information… thanks a lot … for detailed information and references…
This implies that a few things can be noticed without digging up the plant, especially when it is flowering, but to be sure about id, rhizomes are to be taken out…

Thank you very much Sir. Does majority of these members produce seeds? How their dispersing mechanism works?