Convolvulaceae Week: Ipomoea indica from Delhi and California (indiantreepix@googlegroups.com)

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Gurcharan Singh (Google Docs)

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Mar 16, 2012, 2:50:26 AM3/16/12
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 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


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Satish Phadke

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Mar 16, 2012, 6:53:22 AM3/16/12
to Gurcharan Singh (Google Docs), indian...@googlegroups.com
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.
--
Dr Satish Phadke

Balkar Singh

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Mar 16, 2012, 9:10:58 AM3/16/12
to Satish Phadke, Gurcharan Singh (Google Docs), indian...@googlegroups.com
Again beautiful shot Sir
--
Regards

Dr Balkar Singh
Head, Deptt. of Botany and Biotechnology
Arya P G College, Panipat
Haryana-132103
09416262964

Gurcharan Singh

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Mar 16, 2012, 9:22:24 AM3/16/12
to Balkar Singh, Satish Phadke, indian...@googlegroups.com
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



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