SK1854 21 April 2019

[Saroj Kasaju]

Dear Members
 
Location:  Nagarjun Forest reserve, Kathmandu
Date: 20 April 2019
Elevation: 2121 m.

Habit : Wild

Quercus lanata Sm. ??

Thank you.

Saroj Kasaju

[J.M. Garg]

Why not Quercus semecarpifolia Sm. as per images and details herein?

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[Saroj Kasaju]

I guess leaf pattern is more close to Q. lanata.

 900 × 675 

650 × 411 

 3008 × 2000 

 

Thank you.

Saroj Kasaju

[J.M. Garg]

Thanks, Gaurav ji.

Do you agree with Saroj ji's id ?

---------- Forwarded message ---------
From: Gaurav Verma
Date: Fri, 3 May 2019 at 23:52
Subject: Re: SK1854 21 April 2019
To: J.M. Garg <jmg...@gmail.com>

Hi, 

This is not Q. semecarpifolia. First reason, Q. semecarpifolia is a high altitude oak. It normally starts growing from 2500m to 4000m. Quercus lanata/ oblongata/ leucotrichophora grows from 1300m to 3000m. 

 

Secondly, the leaves of Q. semecarpifolia are oval in shape with entire margin or with sharp teeth (normally on young shoots). The underside is brown/golden in colour. The leaves of Quercus lanata/ oblongata/ leucotrichophora are oblong in shape with toothed in apical half. The underside is white/ silver or sometimes yellowish white. I am attaching some photographs of leaves for better understanding. 

[Ushadi Micromini]

saruojji

can you tell us the sources of these photos?

quote: I guess leaf pattern is more close to Q. lanata.

 900 × 675 

650 × 411 

 3008 × 2000 

 

Thank you.

end quote 

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[J.M. Garg]

Thanks, Gaurav ji.

On Sat, 4 May 2019 at 12:54, Gaurav Verma <gv31...@gmail.com> wrote:

Yes, It's Q. oblongata (syn. Q. leucotrichophora/ Q. lanata).

[Saroj Kasaju]

Dear Gaurav Ji,

Is not Q. lanata is separate from Q. oblonggata (Syn Q.  leucotrichophora )

Quercus

                                                                          Species Quercus oblongata D.Don 

Species Quercus lanata Sm.                                                                                                                                                                                                                                                                 

Quercus lanata Sm.

Quercus oblongata

Quercus lanata Sm.

Quercus oblongata D.Don

Quercus lanata Sm. 

Quercus oblongata D.Don

Thank you.

Saroj Kasaju

[J.M. Garg]

Hi, Gaurav ji,

WCSP gives both Quercus lanata Sm. & Quercus oblongata D.Don as accepted species as per details at links.

Pl. clarify.

[Saroj Kasaju]

Deare Gaurv Ji ,

Awaiting for your reply please !

Thank you.

Saroj Kasaju

[Gaurav Verma]

Hi, 

Sorry for the late reply. The story of Q. lanata and Q. oblongata (Syn Q.  leucotrichophora) is very complex. Some authors consider them synonyms and some independent species. The recent classification of oaks has considered them the separate species BUT If you see the specimens used to describe the species, they all are located in Europe or the US. The Flora Of China considers them synonyms after studying them in the natural habitat. 

IMHO, 

1. For describing a species one must study it in its natural habitat i.e Himalaya and adjacent region. 

2. All the features used to describe Q. lanata and Q. oblongata is more or less the same. Some separate them with big acorn cups for Q. lanata and small for Q. oblongata but I observed so much variation in the size. Another feature used is the number of teeth on the leaf margin, which is also very variable in Q. oblongata that I have observed in its habitat (Himachal and Uttarakhand).

3. Another doubt is the distribution of Q. lanata. There are 2 views on this:

3a. It grows from west Himalaya to East and continues into China, Myanmar, North Thailand and Vietnam. 

3b. It is absent in western Himalaya and starts from mid-Nepal to Sikkim, WB, Bhutan, Arunachal Pradesh, China, Myanmar, North Thailand and Vietnam. 

4. The photographs I saw of Q. lanata from an arboretum located in Spain is the same as of any Q. oblongata I have seen in Himachal Pradesh and Uttarakhand. 

5. There is also a third view of this conflict. It says that the Q. oblongata is a subspecies or variety of Q. lanata.

In reality, there is not enough data collected and research done to consider Q. lanata a separate species for now. China has done some ground research but nothing from India yet. There is a need for a proper field study on the species in India (not just Q. lanata but many other oak species).

I hope this will be helpful. 

Kind Regards

Gaurav Verma 

[Saroj Kasaju]

Thank you Gaurav ji for the enlightenment.

Thank you.

Saroj Kasaju