Streblus asper : female flowers

[vip...@gmail.com]

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

[Mahadeswara]

GREAT PHOTOS.

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[sheetal chaudhari]

ohh wow, have never seen this tree in flowering stage

Thanks Viplav Ji

regards,

Sheetal Pachpande

[Usha Desai]

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]

[Madhuri Pejaver]

Dear Ushadi I am not a learned Botanist! But------- 1. There are plants which are dioceous which produced dioceous flowers that is male and female organs in same flower. eg. Mango, Orange Chicku, Brinjal, Bhendi etc 2. There are plants which are dioceous but produce monoceous flowers that is male and female flowers. eg. Tondali, pumpkin (Experts pl correct) 3. There are plants which are monoecious that is they produce only male flower or female flower. Best eg Papaya. In the first type all flowers can form fruit after fertilisation. in second only female flower can form fruit. in third only female plant can form fruit. It is dependent on the genetic make up of the flower/plant to produce the type of flower. Madhuri   --- On Mon, 18/4/11, Usha Desai <ushan...@gmail.com> wrote:

[surajitkoley]

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

[ushadi Micromini]

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
===

--
Usha di
===========

[surajit koley]

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

[vip...@gmail.com]

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 <surajitno...@gmail.com>

[Dr. Badri Narayanan T]

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

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[surajit koley]

Good evening Viplav Ji,

Years ago i read an article on sex changes of fishes, recently i have read a news on "virgin births" in snakes. Your document reminds me all these.

Thank you very much,

Regards,

surajit