Ulhas! I distinctly heard the person mention Putranjiva roxburghii. Maybe he
got the names mixed up.
As for Alstonia I am surprised. This should be a native plant. It is known
as Saptaparni in Hindi/Sanskrit. You were mentioning a whole list of
allergenic plants. Can you attach a copy or give me the link?
akbhatt

On Wed, Sep 3, 2008 at 4:18 PM, Ulhas <[EMAIL PROTECTED]> wrote:

>
> Hi
>
> I do not think that any naturally grown, indigenous vegation is bad
> for ecology of any region.  In nature there is place for variety of
> plants and that biodiversity makes the habitat ecologically healthy,
> sustainable. Indigenous Silk Cotton is a wonderful tree for birds and
> insects and there is no reason for its removal from natural forests,
> even if they are in large nos.  They do not disturb the regional
> ecology or water table, as claimed.
>
> However, in nature there are several plants which are poisonous, which
> have thorns, which cause severe itching, which are allergic to many
> other life forms.  These plants are avoided in urban landscape.  It is
> Alstonia scholaris (not Putranjiva) which is being removed from many
> urban areas because of its allergic properties for many humans.
> Mucuna is another climber (even though it has beautiful flowers) which
> is avoided in urban regions because of its itching pods.  The list is
> long and urban landscape designers have to learn about them.
>
> Natural ecosystems and human-made ecosystems need different parameters
> and strategy for their management.
>
> Ulhas Rane
>  >
>


-- 
Anand Kumar Bhatt
A-59, B.S.F.Colony, Bhind Road
Gwalior. 474 005.

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