Cuscuta ID request - 09012015PC1

[Chitralekha P]

Kindly identify the species of Cuscuta growing in Delhi. I suspect there are two species of Cuscuta here, the one with orange-brown thinner stem is flowering and the other with yellow-green thicker stem (C. reflexa?) is not flowering.

Thank you,

With best regards,

Chitralekha

[J.M. Garg]

Forwarding again for Id confirmation or otherwise please.

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With regards,
J.M.Garg

'Creating awareness of Indian Flora & Fauna'
The whole world uses my Image Resource 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.

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Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of India'.

[surajit koley]

Cuscuta chinensis Lam., I think.

Thank you

Regards

surajit

[Abid Munshi]

Dear Friend
I agree with Dr. Koley for identification
Prof. A. H. Munshi

On 18 January 2015 at 22:15, surajit koley

[surajit koley]

Sir, I am simply graduate in biological science.

Thank you

Regards

surajit

[Chitralekha P]

Thank you Prof. Munshi and Surajit. I am confused; Is it Cuscuta chinensis or C.campestris? How can we differentiate between them?

Best regards,

Chitralekha

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>> With regards,
>> J.M.Garg
>>
>> 'Creating awareness of Indian Flora & Fauna'
>> The whole world uses my Image Resource 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.
>>
>> For identification, learning, discussion & documentation of Indian Flora,
>> please visit/ join our Efloraofindia Google e-group (largest in the world-
>> more than 2400 members & 2,00,000 messages on 9.9.14) or Efloraofindia
>> website (with a species database of more than 10,000 species & 2,00,000
>> images). Winner of Wipro-NFS Sparrow Awards 2014 for efloraofindia.
>>
>> Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of
>> India'.
>
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[surajit koley]

Yes, Madam, you are correct, it is more likely C. campestris Yuncker, provided it is distributed in your area. However, difference can be found in FoC or FoP KEY. Perhaps host plant described there may help reach further conclusion.

Thank you

Regards

surajit

[P. Chitralekha]

Thank you Surajit. In Flora of Delhi ((1963) only two species of Cuscuta are reported to be growing in Delhi, C. reflexa and C. hyaline. I tried FoP but could not conclusively identify the species.

regards,

Chitralekha

[surajitkoley]

Madam,

I Haven't received your mail yesterday, instead replying in the group site directly. This is getting complicated. Please check my thread, I have uploaded a little while ago - https://groups.google.com/d/msg/indiantreepix/4juCgPJGMN8/YHpA9ZMONDEJ.

I think your species look similar to mine.

Your species doesn't look like C. hyalina, for flowers should have acuminate to caudate petals and acute to acuminate sepals. Please check-

http://www.plantillustrations.org/illustration.php?id_illustration=130459

http://www.ispotnature.org/node/535679

Picture of seeds of hyalina can be found at - http://itp.lucidcentral.org/id/fnw/key/FNW_Seeds/Media/Html/fact_sheets/Cuscuta.htm

Thank you

Regards

surajit

[Chitralekha P]

You are right Surajit. It does appear to be C. chinensis which probably has not been reported from Delhi.

Thanks.

Regards,

Chitralekha

[surajit koley]

Madam,

Now I am confused, I have identified my species (at https://groups.google.com/forum/#!topic/indiantreepix/4juCgPJGMN8) as Cuscuta campestris, based on Flora of China KEY -

(i) capsule entirely enclosed by withered corolla = chinensis

(ii) capsule subtended by withered corolla = campestris

Thank you

Regards

surajit

[Chitralekha P]

Yes, Surajit. I am now fully convinced that it is Cuscuta campestris. I dissected the flowers and found them to be exactly as described in Flora of China.

Thank you,

Regards,

Chitralekha

[surajit koley]

Thank you very much Madam. I also tried to dissect those flowers to see scales! But it was impossible to me to see anything inside.

With regards

surajit

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[Chitralekha P]

Dear Surajit,

The scales are very much there. They are present where the filaments have fused with the petals (attached photo).Can I also call them coronal outgrowths? if yes, are they then petaloid or staminal in origin? The host in this case is Clerodendrum inerme. After flowering the parasite withers and dies. I am yet to see the other Cuscuta species (probably C.reflexa) with the greenish-yellow stem flower in Delhi. 

Like C. reflexa, C. campestris  too shows self-parasitism though not as aggressively.

Best regards,

Chitralekha

[surajit koley]

Thank you again so much Madam, I also noticed those translucent growth, but couldn't make out their shapes. Neither could I focus my camera to take a snap.

Yes, I also noticed Clerodendrum is their host, in our case is Clerodendrum infortunatum.

Thank you once again.

Regards

surajit

[Ushadi Micromini]

I cant get into this discussion no time family still here

but I love this up-cycle use of the broken eyeglass lens as a slide ...

impressed with your innovative-ness

I use them as magnifiers in dire emergency..

and hang on the purse handles etc to pull zipper chains etc...when I have time

usha di

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Usha di
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[Chitralekha P]

Thanks Ushadi. Surajit, there are five delicate translucent scales with inward-facing finger-like  projections at their tips (fimbriolate?) . Will try to get a better picture.

Regards,

Chitralekha

[surajit koley]

Yes, Madam, I can very well see the finger like projections in the photograph you have uploaded.

I thank you very much for this excellent learning session.

Regards

surajit