Hi Alok ji Thanks for that interesting information. So my guess was correct like any lay man. Satish
On Tue, Jul 19, 2011 at 5:19 PM, Pinki <[email protected]> wrote: > Dear Satish Ji > > Here some info...... > > Long ago in simpler times there was s alarge genus of about 700 > species called Eucalyptus and a very small genus (with 7 species) > called Angophora and together they were called gum trees by > Australians because they looked very similar. The reason they were > different is that they differed in two characters- unlike all the > Eucalyptus species (whose flower buds are initially covered by a > little cap), the buds of Angophora are naked and uncapped. That’s > pretty fundamental esp if you remember that the name ‘eu-calyptus’ > means ‘well-covered’ pointedly refer to the bud caps. What’s more, > unlike Eucalyptus, the flowers of Angophora have petals, tiny little > ones, but petals nevertheless- and it wasn’t easy to avoid these > differences. > This was the situation till 1995, when 2 australian botanists called > Hill and Johnson published a paper formally recognizing a new genus > called Corymbia, comprising 113 species that had been scooped out from > genus Eucalyptus. The genus Eucalyptus had been subdivided into 7to 12 > sub-generic groups to manage its sprawling empire of almost 700 > species and Corymbia was one of them. Hill and Johnson’s paper argued > that all the species in the sub-group Corymbia differed enough from > the rest of the species in Eucalyptus genus to merit becoming a genus > on their own. > Many scientists resisted the change and continued to use the old name > for Corymbia implicitly disagreeing from Hill and Johnson’s > proposition. At the same time, studies in DNA sequencing were > beginning to show that the Corymbia were in fact more closely related > to Angophora than to Eucalyptus. > Yet resistance to the name change continued. One of the fear was that > by the same logic, taxonomists might seek to promote all the separate > subgenera of Eucalyptus into new genera. What probably rankled most of > all was that – unlike the separation of Eucalyptus from Angophora, > which was based on easily visible differences – the differences > between Eucalyptus and Corymbia are at a subtle level, not easily > recognized. There are no obvious characters of bark bud or foliage to > mark the separation. > Acceptance of the new genus will be a long, slow process but for the > moment, whatever genus one uses – Eucalytus citriodora or Corymbia > cotriodora – the only tree that will be in reference is the lemon > scented gum. > > > Alok > > On Jul 18, 11:00 pm, Satish Phadke <[email protected]> wrote: > > Looks like a Eucalyptus species..... > > > > > > > > > > > > > > > > On Tue, Jul 19, 2011 at 6:35 AM, Balkar Arya <[email protected]> > wrote: > > > Dear All > > > > > Corymbia citriodora from IARI regional Station Karnal > > > very large trees about 50 years old as told by the persons working > there > > > leaves scented with lemonoid fragrance > > > -- > > > Regards > > > > > Dr Balkar Singh > > > Head, Deptt. of Botany and Biotechnology > > > Arya P G College, Panipat > > > Haryana-132103 > > > 09416262964 >
