The swollen part is perhaps the callus tissue formed by the tree as a protective measure against external injuries. The tree seems to have survived tremendous and periodical disturbances as seen from the size and number of callus. The rocky habitat may be another reason for this heavy callus formation, as there is no room for the trunk to grow laterally. I don't think it is a disease.
Regards Vijayasankar Raman National Center for Natural Products Research University of Mississippi On Sun, Sep 2, 2012 at 4:50 AM, jmgarg1 <[email protected]> wrote: > Forwarding again for any assistance in the matter please. > > ---------- Forwarded message ---------- > From: Narendra Joshi <[email protected]> > Date: 22 August 2012 14:43 > Subject: [efloraofindia:125463] Unusual Neem Tree > To: indiantreepix <[email protected]> > > > Dear All, > > A neem tree with swelled bark was observed at Mammalapuram. I would like > to know whether the tree is victim of any disease, if any such kind exists > in trees? > > -- > With Regards, > Narendra Joshi > > -- > > > > > > > -- > With regards, > J.M.Garg > http://en.wikipedia.org/wiki/User:Jmgarg1 > 'Creating awareness of Indian Flora & Fauna' > The whole world uses my Image Resource of more than a *thousand species*& > eight thousand images of Birds, Butterflies, Plants etc. (arranged > alphabetically & place-wise): > http://commons.wikimedia.org/wiki/Category:J.M.Garg. You can also use > them for free as per Creative Commons license attached with each image. > For identification, learning, discussion & documentation of Indian Flora, > please visit/ join our Efloraofindia Google e-group: > http://groups.google.co.in/group/indiantreepix (more than 1950 members & > 1,27,800 messages on 31/8/12) or Efloraofindia website: > https://sites.google.com/site/efloraofindia/ (with a species database > of more than 7000 species). > Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of > India'. > > --
