Deutzia corymbosa

Deutzia corymbosa : 32 posts by 2 authors. 8 images.

Deutzia corymbosa
Shimla
May 2018

Your photographs are from UK, where only D. staminea and D. compacta occur. In H.P., only D. staminea and D. corymbosa occur. According to FLORA OF GARHWAL by GAUR, young branches are reddish brown in D. compacta (also in your samples), while brownish in D. corymbosa.

Leaves are comparatively larger in size in D. corymbosa.
I think, your plant is rightly identified and my plant is different.
FROM FLORA OF CHINA
(They do not have D. corymbosa)
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=109728
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=241000484
http://www.efloras.org/object_page.aspx?object_id=12445&flora_id=2

Oh! Got another hint in PLANTS OF KEDARNATH WILDLIFE SANCTUARY, WESTERN HIMALAYA by Rai, Singh and Rawat.
Leaf base rounded or broadly cuneate in D. compacta.

Your images look similar to those at Deutzia staminea R.Br. ex Wall. 

No, Sir. These are quite different from D. staminea.

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What are the keys given in your books?

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I am following Local Floras (Flora Simlensis, Flora of Sirmaur, Flora of Kullu, Flora of Chamba, Flora of Bashahar Himalaya, Flora of Lahul) along with POWO and WFO at present. I do not use Catalogue of Life.
POWO as well as WFO consider these three species (Deutzia hookeriana (C.K.Schneid.) Airy Shaw, Deutzia corymbosa R.Br. ex G.Don and Deutzia compacta Craib) as separate and accepted species. Deutzia staminea is quite different from these.
http://www.plantsoftheworldonline.org/names:790854-1
http://www.plantsoftheworldonline.org/names:790821-1
http://www.plantsoftheworldonline.org/#distribution-map
http://www.worldfloraonline.org/taxon/wfo-0000642597
http://www.worldfloraonline.org/taxon/wfo-0000642511
http://www.worldfloraonline.org/taxon/wfo-0000642520
http://www.plantsoftheworldonline.org/names:790907-1
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Leaves of Deutzia staminea (smaller one) and D. corymbosa (larger one) for comparison

Leaves of Deutzia staminea and D. corymbosa for comparison.
Attachments (2)

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Deutzia staminea

D. corymbosa

Fruits for comparison
Clicked in June 2018
Attachments (2) 

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Thanks, … You can clearly see calyx teeth is acute here and not obtuse as given in the keys for D.corymbosa. I think this is the most important character.

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For your posted plant, I will go for Deutzia staminea R.Br. ex Wall. (where calyx is clearly seen).

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Kindly see the leaf characteristics, leaf size, abaxial surface and inflorescence type.
I have no confusion between D. staminea and D. corymbosa. However, due
to nomenclatural changes, status of D. compacta, D. hookeriana and D.
corymbosa may change as they are more similar to each others.

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Calyx teeth

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Posting Deutzia staminea separately.

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Calyx teeth is acute. Can you explain why the key states it to be obtuse?

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By seeing your other post, calyx looks a bit different, but calyx teeth is still acute.

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Pl. see calyx in D.compacta as per FoC illustration

I agree with your id as D. corymbosa, but keys w.r.t. calyx teeth are not properly worded, causing confusion.

Have you seen my another post on D. staminea?
Attaching information from FLORA OF KULLU which says calyx lobes ovate/obtuse as seen in this case.
Attachments (1)

Yes, … Calyx teeth acute in the key is confusing. However, they look entirely different from each other. Leaves are large in D. corymbosa with green lower surface (Grey in D. staminea). Inflorescence is terminal (axillary panicles in D. staminea).

Could this be Spiraea cantoniensis??

It could be Dutzia only

Deutzia corymbosa

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