Dear Pankaj Really it is very interesting thanks a lot for giving detail informaiton & educating me a lot about the orchides thanks again Nayan ................................... N.S.Dungriyal IFS Chief Conservator of Forests and Field Director Satpura Tiger Reserve Hoshangabad M.P. 09424792100
________________________________ From: Pankaj Kumar <[email protected]> To: Nayan Singh <[email protected]> Cc: indiantreepix <[email protected]> Sent: Thu, 8 October, 2009 11:02:18 PM Subject: Re: [indiantreepix:20436] Re: Geodorum densiflorum – NSD 38 Dear Sir, I have made few observations during my 6 years of study some of which I am discussing below. Geodorums are very peculiar. A small shoot like green structure originates from the previous years underground corm that are present at the end of the chain of corms. Then at a certain point, the shoot bifurcates, one tip growing into foliar part and the other part growing into the floral axis, on the onset of monsoon (but both emerges from the same shoot, so at the lower end if u dig out the corm you will wild them covered with same foliar bracts). Sometimes, when the rain abruptly stops the foliar part gets stunted for the time being, sometimes they even die, but the floral axis gets nourishment from the previous years corm so it keeps growing. Thats a kind of successful flowering strategy in this particular orchid. So its not a big deal if the plant will bear leaves or not during the flowering period. Orchids have very peculiar growth habits. Some orchids flower in the stress when there is scarcity of food material whereas some flowers when the food material is abundant. Some orchids give both foliar and floral shoot whereas some gives floral first, whereas some give foliar first.......In orchids like some species of Eulophias (Eulophia explanata) floral stalk emerges in extreme stress, its like when the perrenating underground corms think that they can't bear it anymore (in the extreme heat of summer at a temperature of around 40 degree celsius) then they give out small callus like structure near the previous year's corm. The callus has usually two apices. If the stress persists then one apice give rise to floral stalk, where as other remains stunted and when it starts raining, then it becomes active to give foliar stalk....but if it rains abruptly, then it give foliar stalk and the plant doesnt flower in that year at all....... U can see a healthy flower of Eulophia explanata growing in the extreme heat of summer, without any leaf, when most of the other herbs seems to be dying off !!! ..INTERESTING NA !!! :) Regards Pankaj From cricket scores to your friends. Try the Yahoo! India Homepage! http://in.yahoo.com/trynew --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "indiantreepix" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.co.in/group/indiantreepix?hl=en -~----------~----~----~----~------~----~------~--~---
