Helianthus debilis ssp. cucumerifolius

Images by Gurcharan Singh, D S Rawat, Aarti Khale and Prashant Awale, Inserted by Gurcharan Singh

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from Delhi– May’10?; 25 /06/2010- On the road side near JNU, New Delhi; Helianthus debilis from Delhi – efloraofindia | Google Groups 050610vks2 – efloraofindia | Google Groups
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Astaraceae Fortnight Part-I (Radiate heads) : Sunflowers : Attachments (4). 1 post by 1 author.

Sunflowers

 

I had seen this plant at Nagpur in a Garden.
Date/Time: 20th April / 05:30PM.

Helianthus debilis I think.

Helianthus debilis (=H.cucumerifolius).

… Will it also be Helianthus debilis subsp. cucumerifolius (Torr. & A.Gray) Heiser as per another thread ?

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Asteraceae Fortnight : Part 1 – Radiate Heads : Helianthus debilis : 140513 : AK-60 :  Attachments (1). 3 posts by 2 authors.

Helianthus debilis seen in one of the gardens.

Cultivated, ornamental.

Helianthus debilis subsp. cucumerifolius (Torr.& A.Gray) Heiser [=H.cucumerifolius] is a popular ornamental sunflower in Pantnagar. It is blooming nowadays (10.5.13) profusely.

Helianthus debilis Nutt., with smaller flower heads 7-10 cm across, photographed from Delhi.

After upload by …, and looking at keys in eFlora of N. America I have concluded that our Delhi plant is in fact subsp. cucumerifolius having erect habit and very long peduncle.

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Hooghly : premature death of a Helianthus :  3 posts by 2 authors. Attachments (4).

A sapling, seems to be Helianthus debilis Nuttall subsp. cucumerifolius (Torrey & A. Gray) Heiser, @ Rs.10 on the 30th March.

Last photographed on 20th April.
Passed away on the 26th.

Cause of death : Unknown (possibly a stray cat jumped and crashed over it)

Thanks … for this further exploration. This plant is very commonly cultivated in Delhi and often runs wild and may be found on garbage dumps or waste places. When I came to Delhi in 1975, some one introduced this plant to me as Viguieria helianthoides, and this went on for many years till a few years back when I identified it as Helianthus debilis. It is good that you mentioned subspecies cucumerifolius, and after seeing key in eflora of N. America, I realised that plant grown in Delhi is actually this one only.

Thanks once again for update.

Good morning Sir and thank you very much. Initially it was a tough fight between debilis and tuberosus. Single capitulum and long attenuate apex of phyllary, as described in FoC, helped.

A cultivated, garden plant seen in Dubai during my visit in March, 2020.

Pl. check Helianthus debilis subsp. cucumerifolius (Torr. & A.Gray) Heiser as per details herein and as per keys in Flora of China.
I think as per keys flower size is important.

Thanks … It does look like your suggested id.

Flower size was smaller compared to Helianthus annuus.

 

 

References:

The Plant List  GRIN  Flora of China  wildflower