Dear friends,
I have been planting native trees and shrubs in order to attract
frugivorous birds wherever possible. How does one plant dioecious species
like Streblus asper
and Azima tetracantha? I presume one should plant more than two together.
Is there any way of knowing the sex in the sapling stage? Is there any way
of selecting one sex over the other? I have read that the temperature in
the incubation chamber decides the sex of the offspring in some reptiles.
I shall be grateful for your suggestions.
Regards
Dr Badri Narayanan
On Oct 19, 2012 11:31 AM, "[email protected]" <[email protected]> wrote:
> Hi Surajit ji,
>
> There are several Sandpaper trees near my home in Mumbai and have been
> observing them regularly since the last few years. From what I have noticed
> here, it is usually dioecious and less commonly monoecious. One such
> monoecious specimen in Kandivali bears female flowers & fruit in the
> lowermost branches while the upper branches bear male flowers.
>
> In a paper on the floral morphology of *Streblus asper *(Sept. 1975), BPS
> Chauhan wrote that "the plant is monoecious with male and female flowers on
> the same or on two different branches. But those from South India have been
> reported to be dioecious by Rau (1942)." He then inferred that "*Streblus
> asper* Lour. is monoecious or dioecious." This was published in the Agra
> University Journal of Research in 1976.
>
> Interestingly, *Streblus asper* is said to be dioecious in Dr Almeida's *Flora
> of Maharashtra* while it is described as being monoecious ("male and
> female flowers are produced separately on the same tree") in his book *The
> Trees of Mumbai*, pg. 171.
>
> Have attached a very interesting document on the condition of monoecy and
> dioecy for your reference. It was published in a journal called 'The
> Phytologist' in 1859. Among other things, it indicates how certain
> variables such as temperature can influence the formation of male and
> female flowers. I am equally curious to know how and why this happens.
>
> Best wishes, Viplav
>
>
> 2012/10/16 surajit koley <[email protected]>
>
>> No problem Usha Di, now i have two Usha Di... the question remains there,
>> how can be a plant both, monoecious and dioecious !!!
>>
>> Regards,
>>
>> surajit
>>
>>
>>
>> On Tue, Oct 16, 2012 at 11:08 AM, ushadi Micromini <
>> [email protected]> wrote:
>>
>>> Surajit...
>>> this is why I am Usha di
>>>
>>>
>>> This other lady (one of other 3 I think) who share the same name
>>>
>>> You want to respond to Usha Desai Ji of Bombay....
>>> SHe is part of the active group that goes for tree appreciation walks in
>>> Bombay...
>>> (TAW) is usually mentioned after her name...
>>>
>>> Usha di
>>> ===
>>>
>>>
>>>
>>>
>>> On Mon, Oct 15, 2012 at 8:30 PM, surajitkoley <
>>> [email protected]> wrote:
>>>
>>>> Usha Di,
>>>>
>>>> A description at FoC -
>>>> http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200006384
>>>>
>>>> I ask the same question too....!
>>>>
>>>> Regards,
>>>>
>>>> surajit
>>>>
>>>>
>>>> On Monday, 18 April 2011 11:43:28 UTC+5:30, usha desai wrote:
>>>>>
>>>>> THANK YOU VIPLAV FOR SHARING THIS.
>>>>>
>>>>> Friends
>>>>> Kandivali [North suburb of Mumbai] has many Sand Paper Trees.
>>>>> As Viplav told me this should be declared AS The Tree of Kandivali as
>>>>> it is one of the original flora of the area.
>>>>> What is interesting is the tree is supposed to be dioecious[male and
>>>>> female flower on separate trees.]..but Viplav saw both on the same tree ,
>>>>> it also had fruits...male flowers are in group and easy to notice but
>>>>> for female ,it is solitary and really tiny so one has to hunt for
>>>>> it....PROBABLY VIPLAV IS THE ONLY PERSON WHO HAS MANAGED TO GET IT
>>>>> PHOTOGRAPHED...GOOGLE SEARCH WAS FUTILE...
>>>>> My question to learned botanist is how does one explain that a
>>>>> dioecious tree is presenting as monoecious.....many trees where we saw
>>>>> male
>>>>> flowers had fruits....female flowers are dificult to locate.. Thanking you
>>>>> all in advance.
>>>>> yrs sincerely Usha Desai [TAW]
>>>>>
>>>>> On 16 April 2011 18:38, sheetal chaudhari <[email protected]> wrote:
>>>>>
>>>>>> ohh wow, have never seen this tree in flowering stage
>>>>>>
>>>>>> Thanks Viplav Ji
>>>>>>
>>>>>> regards,
>>>>>> Sheetal Pachpande
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Fri, Apr 15, 2011 at 12:25 AM, [email protected]
>>>>>> <[email protected]>wrote:
>>>>>>
>>>>>>> Dear friends,
>>>>>>>
>>>>>>> Sharing some pictures of the female flowers & fruit of the Sandpaper
>>>>>>> Tree [Streblus asper] observed in Kandivali, North Mumbai.
>>>>>>>
>>>>>>> I rarely indulge in photography and am grateful to my friend
>>>>>>> Hitendra Agrawal for agreeing to join me and photographing these.
>>>>>>>
>>>>>>> I joined this group in July 2010 and keep learning thanks to the
>>>>>>> unceasing efforts of the active members.
>>>>>>>
>>>>>>> Best wishes, Viplav
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>
>>>
>>> --
>>> Usha di
>>> ===========
>>>
>>>
>>
> --
>
>
>
>
--
