Very interesting and informative. Thank you Chris !
Thank you. Saroj Kasaju On Thu, Jan 26, 2017 at 10:39 AM, J.M. Garg <[email protected]> wrote: > Thanks, Chadwell ji. > > ---------- Forwarded message ---------- > From: C CHADWELL <[email protected]> > Date: 26 January 2017 at 09:11 > Subject: ALIEN & ADVENTIVE plant species in India > To: "J.M. Garg" <[email protected]> > > > When posting images of a plant it is HELPFUL that an indication is given > as to whether the > specimen was growing in the wild or cultivated. Just because a plant is > not in a park, garden or > field is not alone an indication of whether it is a NATIVE species. Some > introduced species become > naturalised and it can be difficult to tell they are not 'wild' or not, > particularly if the photographer is > not familiar with genera typically cultivated as crops or ornamental > purposes. > > It is of significance whether a plant occurs naturally. Much is talked > about CONSERVATION. It makes > sense to concentrate our concerns about NATIVE species and NOT > introductions. Some of the most eye- > catching plants may well be INTRODUCTIONS - unfortunately, some are > INVASIVE and troublesome. > > Where I live (and thus most frequently botanize) has MANY Alien plant > species. > > Where I live in the UK is within the old county of Buckinghamshire > (nowadays the newish boundary puts me > in Berkshire). For recording purposes of The Botanical Society of Britain > & Ireland (BSBI) I remain > in 'Buckinghamshire'. I have a copy of the 'Flora of Buckinghamshire' > from 1926; it is fascinating to > compare the abundance (or not) of species then with nowadays - there have > been many changes during > the past century. The same no doubt applies in India. Collet's 'Flora > Simlensis' (1921) allows a comparison > with present day Shimla and surrounding areas. > > There is not an up-to-date Flora for Buckinghamshire but the useful 'A > CHECKLIST OF THE PLANTS OF > BUCKINGHAMSHIRE' Maycock & Woods (2005) is available. > > In it they include, in alphabetical order by genus and species, both > NATIVE and ALIEN taxa. 'Native' taxa are > those believed to be in Buckinghamshire entirely due to natural > processes. 'Alien' taxa are those that have been > introduced to Buckinghamshire by human activity (intentionally or > accidentally). Those long established in Great > Britain (i.e. before 1500) are known as ARCHAEOPHYTES; those established > since 1500 are NEOPHYTES. Other > aliens are listed as 'Casual' if they do not maintain themselves in the > county by seed or vegetative means, or are > obviously planted. > > Why 1500? The first of four voyages across the Atlantic by Italian > Explorer Christopher Columbus took place in 1492 > and led to the introduction of plant material. The Romans introduced > quite a number of plants into Great Britain. > > > Best Wishes, > > > Chris Chadwell > > > 81 Parlaunt Road > SLOUGH > SL3 8BE > UK > > www.shpa.org.uk > > > > > > > > -- > With regards, > J.M.Garg > > 'Creating awareness of Indian Flora & Fauna' > <http://en.wikipedia.org/wiki/User:Jmgarg1> > > Winner of Wipro-NFS Sparrow Awards 2014 for efloraofindia > <https://sites.google.com/site/efloraofindia/award-for-efloraofindia>. > > For identification, learning, discussion & documentation of Indian Flora, > please visit/ join our Efloraofindia Google e-group > <https://groups.google.com/forum/#!forum/indiantreepix> (largest in the > world- around 2700 members & 2,40,000 messages on 31.3.16) or Efloraofindia > website <https://sites.google.com/site/efloraofindia/> (with a species > database of more than 11,000 species & 2,20,000 images). > > The whole world uses my Image Resource > <http://commons.wikimedia.org/wiki/Category:J.M.Garg> of more than a > thousand species & eight thousand images of Birds, Butterflies, Plants etc. > (arranged alphabetically & place-wise). You can also use them for free as > per Creative Commons license attached with each image. > > Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of > India'. > -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at https://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
