Satish ji
According to  eFlora of Pakistan, eFlora of China and The Plant List,
Ipomoea learii Paxton is a synonym of I. indica. I have given differences
between I. indica and I. nil. Here are specific differences:

*Ipomoea indica
                             Ipomoea nil*

1. Stems appressed pubescent, sometimes rooting at nodes     1. Stems
covered with long spreading hairs.

2. Leaves pubescent with short hairs
         2.  Leaves with long spreading hairs

3. Infl. Several flowered in dense umbellate cymes.
 3.  Inf. 1-few flowered.

4. Bracts linear or lanceolate.
                                                      4. Bracts linear or
filiform

5. Sepals subequal, gradually linear-acuminate,
 5. Sepal almost equal, with spreading long hairs on outside

     appressed pilose, outer 3 lanceolate to broadly
        near base, subglabrous above with linear tip

     lanceolate, inner 2 narrowly lanceolate.

6. Corolla blue or bluish-purple aging to red, 5-7 cm long.
 6. Corolla pale to bright blue with white tube, fading pinkish


                                        with age, 3-5 cm long

7. Capsule 10-13 mm across.
              7. Capsule 8-10 mm across


-- 
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://www.gurcharanfamily.com/
http://people.du.ac.in/~singhg45/



On Fri, Mar 16, 2012 at 6:40 PM, Balkar Singh <[email protected]> wrote:

> Again beautiful shot Sir
>
>
> On Fri, Mar 16, 2012 at 4:23 PM, Satish Phadke <[email protected]>wrote:
>
>> Repeating the comments
>> I have a query about differentiation between the three species.
>> I.indica
>> I.nil
>> I. learii
>> I have seen the last one in Mahabaleshwar with Shrikant ji(Will post it
>> separately)
>> I hope you will tell us the differences clearly.
>>
>>
>> On Fri, Mar 16, 2012 at 12:20 PM, Gurcharan Singh (Google Docs) <
>> [email protected]> wrote:
>>
>>>  I've shared Convolvulaceae Week: Ipomoea indica from Delhi and
>>> California<https://docs.google.com/document/d/1itTfLyOn32VY3HIJ-r9t8BQmMbdLre3tL8NA1yEsfSM/edit>
>>>  Click to open:
>>>
>>>    - Convolvulaceae Week: Ipomoea indica from Delhi and 
>>> California<https://docs.google.com/document/d/1itTfLyOn32VY3HIJ-r9t8BQmMbdLre3tL8NA1yEsfSM/edit>
>>>
>>>
>>>  Ipomoea indica (Burm.f.) Merrill, Interpr. Herb. Amboin. 445. 1917
>>>
>>> Syn: Convolvulus indicus Burm.f.; Ipomoea mutabilis Lind.
>>>
>>> Herbaceous climber similar to I. nil in sometimes 3-lobed leaves, longer
>>> sepals often reaching 24 mm and narrowed towards tip, but distinct in
>>> sepals with appressed pubescent, corolla usually longer, bluish with
>>> commonly purplish throat.
>>>
>>> Photographed from Delhi and California
>>>
>>>  Ipomoea-indica-Delhi-1
>>>
>>>  Ipomoea-indica-Delhi-2
>>>
>>>  Ipomoea-indica-Delhi-3
>>>
>>>  Ipomoea-indica-California-1
>>>
>>>  Gurcharan Singh
>>>
>>>
>>> Google Docs makes it easy to create, store and share online documents,
>>> spreadsheets and presentations.
>>> [image: Logo for Google Docs] <https://docs.google.com>
>>>
>>
>>
>>
>> --
>> Dr Satish Phadke
>>
>
>
>
> --
> Regards
>
> Dr Balkar Singh
> Head, Deptt. of Botany and Biotechnology
> Arya P G College, Panipat
> Haryana-132103
> 09416262964
>

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