Balsaminaceae, Geraniaceae and Oxalidaceae Week: Oxalidaceae- The fate of Oxalis dehradunensis- it is Oxalis intermedia-GS-4

[Gurcharan Singh]

Last year we had detailed discussion on plants uploaded by Nidhan ji and Balkar ji, ultimately concluding on the basis of listing in The Plant List, that it is a synonym of Oxalis latifolia Kunth, 1822

https://groups.google.com/forum/#!searchin/indiantreepix/Oxalis$20dehradunensis/indiantreepix/Xm0FRnWatfE/xrb2ZsFdVVMJ

Raizada's new name (Nom nova) O. dehradunensis for O. intermedia A. Rich was based on early entry in IPNI considering 1845 (1842) as its date of publication as against 1841 for O. intermedia Steud., 1841. As it appears the date of publication of A. Rich. 1841 and opposite to what Raizada considered, Biophytum intermedium , 1839 antedates the binomial given by Steudal and is correctly Biophytum intermedium Wight, 1839 and not (Steud.) Wight, and citation for Oxalis intermedia is accordingly (Wight) Steud. and not O. intermedia Steud.

Recent studies have shown that Oxalis intermedia A. Rich. and O. latifolia are two distinct species, and not synonyms. This is supported by recent publications such as CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City., Davidse, G., M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera. (editores generales) 2013. Vitaceae a Geraniaceae. Fl. Mesoamer. 3(1): ined., and Nesom, G. L. 2009. TAXONOMIC NOTES ON ACAULESCENT OXALIS (OXALIDACEAE) IN THE UNITED STATES.  Phytologia (December 2009) 91(3) 501-526.

I am sharing the pdf of last (2009) publication and reproducing below the key from the publication:

1. Leaflets obtriangular to broadly obtriangular, (20–)30–50 mm long, 1.5–2.5(–3) times wider than long; 

          stems and leaves arising from a      cluster of small sessile bulblets; capsules and seeds rarely formed;

          flowers semi-homostylous........................................................................….Oxalis intermedia

1. Leaflets obcordate to obtriangular, 15–40 mm long, 1.1–2(–3) times wider than long; stems and leaves

          usually arising from a single bulb, rarely producing additional sessile bulblets; capsules and seeds

          often formed; flowers tristylous, rarely homostylous.......................…..…….Oxalis latifolia 

I seem to have both these species in my collection, and would upload both.

Here is Oxalis intermedia A. Rich. from Chakrata and along Mussoorie Chakrata road.

Oxalis intermedia A. Rich., Hist. Phys. Cuba, Pl. Vasc. 315. 1841

syn: Oxalis dehradunensis Raizada, 1976; Ionoxalis intermedia (A. Rich.) Small, 1907

This stemless species species is distinct from O. latifolia in leaves arising from a cluster of small sessile bulblets, leaflets broadly obtriangular leaves with usually acute angles and flat upper edge, larger green leaflets 30-40 cm long, smaller purple flowers more in number.

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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/

[Balkar Singh]

Thanks Sir for the Clarification

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Regards

Dr Balkar Singh
Head, Deptt. of Botany and Biotechnology & 

Horticulture Incharge
Arya P G College, Panipat
Haryana-132103
09416262964

[J.M. Garg]

Thanks, Singh ji,

That means all species we considered as Oxalis dehradunensis should now be put under Oxalis intermedia.

Pl. confirm so that I can make necessary changes in efi site.

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With regards,
J.M.Garg

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[Gurcharan Singh]

Yes Garg ji

-- 

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/ 

[Satish Phadke]

The difference in size of the leaf seems to be very little.
What is important to look at in the field is the
bulblet...single (Latifolia) Multiple(Intermedia) and the
style.Tristylous in latifolia.
Am I clear? Hope so.

Dr Satish Phadke

[J.M. Garg]

Hi, Singh ji,

Catalogue of life now gives Oxalis intermedia A.Rich. as a syn. of Oxalis latifolia subsp. latifolia
While it (CoL) and POWO give Oxalis dehradunensis M.Bieb.Raizada as an accepted name.

Does it has any bearing ?

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For identification, learning, discussion & documentation of Indian Flora, please visit/ join our Efloraofindia Google e-group (largest in the world- more than 3,000 members & 3,00,000 messages on 23.8.18) or Efloraofindia website (with a species database of more than 13,000 species & 3,00,000 images of which more than 2,50,000 images are directly displayed on 31.1.20).

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.

[J.M. Garg]

Oxalis richardiana C.R.Babu is give as a syn. of Oxalis dehradunensis M.Bieb.Raizada as per CoL and distribution given is only India.

I do not find any specimen of Oxalis dehradunensis M.Bieb.Raizad in GBIF, while there are 1018 specimens of Oxalis latifolia Kunth in GBIF.

After pursuing all posts in efi site at Oxalis intermedia and Oxalis latifolia subsp. latifolia, I am inclined to put them all under Oxalis latifolia subsp. latifolia as I hardly find any visible difference between the two.

As most of the species have been introduced from outside, than how are we going to have a species like Oxalis dehradunensis M.Bieb.Raizada, with distribution only in India ? It is also not mentioned in eFloras, where only Oxalis latifolia Kunth is mentioned.

[Gurcharan Singh]

This should be typical O. dehradunensis