Dodonaea viscosa subsp. angustifolia or Dodonaea viscosa subsp. viscosa

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J.M. Garg

Aug 5, 2020, 12:46:12 AM8/5/20
to efloraofindia, Isabelle & Alok, Rathinasabapathy Bhuvaragasamy, Nidhan Singh, Prashant awale, GurcharanSingh, D.S Rawat, Alka, Somil Daga, Anurag sharma, Sourav Mahmud, Aarti S. Khale
There has been a lot of confusion as to whether our plants posted in efloraofindia at Dodonaea viscosa are Dodonaea viscosa  subsp. angustifolia or Dodonaea viscosa subsp. viscosa.
Pl. see confusion in various sources at Dodonaea‎. However, most of the sources generally point towards  Dodonaea viscosa  subsp. viscosa
In Celastraceae & Sapindaceae Fortnight : Sapindaceae : Dodonaea viscosa : Oman : 090114 : AK-3, one of our member has stated that The plant of Dodonaea is available in India are mostly D. angustifolia.... in most of flora it is identified as D. viscosa.... It will be better to consult Flora of Kerala and Leenhouts, P.W. 1983. Notes on Extra-Australian species of Dodonaea. Blumea 28 (2): 271-289.
As per Pl@ntUse:
The genus Dodonaea comprises about 60 species, which are almost all restricted to Australia, suggesting Australia is an evolutionary centre of dispersal. In Australia, Dodonaea viscosais described as having seven subspecies, which are largely geographically distinct. In tropical Africa, 2 varieties of Dodonaea viscosa are distinguished: the coastal var. viscosa, which has usually bisexual, whitish flowers, a strongly 2-lobed scar of fallen sepals beneath the fruit and not or only slightly compressed seeds, and the mainly inland var. angustifolia (L.f.) Benth., which has usually shorter and narrower leaves, usually unisexual, greenish-yellow flowers, a more or less annular scar of fallen sepals beneath the fruit and more compressed seeds. These differences are sometimes considered sufficient to distinguish 2 separate species, the latter variety given specific rank (as Dodonaea angustifolia L.f.).

However, I got a difference from a very authentic source Austraian Native Plants Society, where all 7 subsp. are given.

Dodonaea viscosa is a very variable species with several subspecies recognized. In habit it ranges from a small shrub to a small tree up to 8 metres high. Features of the various subspecies found in Australia are:

  • subsp.viscosa - compact, spreading shrub 1 - 3 metres high. The leaves are wedge-shaped (cuneate) to narrow-obovate (egg-shaped), 1.5 - 3 cm long with a short, blunt point or occasionally 2 - 3 toothed. This subspecies is generally found in mallee scrub to open forests in South Australia, Victoria and New South Wales. Pl. see details at Australian Tropical Rainforest Plants
  • subsp.burmanniana - small tree 2 - 6 metres high with narrower and longer leaves than subsp.viscosa (6.5 - 15 cm long). This subspecies is found from north eastern New South Wales to north-east Queensland.
  • subsp.angustifolia - compact shrub to 3 metres high with much narrower leaves than subsp.burmanniana and of similar length. This subspecies is found from south east Queensland to Victoria. Pl. see Plant Net and POWO
  • Going through our posts, Dodonaea viscosa, our posts are correctly placed as Dodonaea viscosa subsp. viscosa.
With regards,

Santhan P

Aug 15, 2020, 11:19:39 AM8/15/20
to efloraofindia
Mathew flora of Tamilnadu carnatic also discussed about this. Thanks Garg ji for you clear analysis.

Gurcharan Singh

Apr 1, 2023, 7:06:02 PM4/1/23
to eFloraofIndia
Yes Garg ji, your interpretation is correct. My submissions from Delhi as well as from California are subsp. viscosa.

Ponnutheerthagiri Santhan

Apr 1, 2023, 10:54:29 PM4/1/23
to efloraofindia
Thanks Garg ji for clarification.

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J.M. Garg

Apr 2, 2023, 12:38:00 PM4/2/23
to efloraofindia, GurcharanSingh
Thanks a lot, Singh ji
With regards,
J. M. Garg

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