Asteraceae Fortnight Part 2-Discoid heads- Matricaria matricarioides (Less.) Porter ex Britton,. from Kashmir -GS51

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Gurcharan Singh

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Jun 11, 2013, 10:02:19 AM6/11/13
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Matricaria matricarioides (Less.) Porter ex Britton, Mem. Torrey Bot. Club. 5: 341. 1894.  
syn: Artemisia matricarioides Less., Linnaea 6: 210. 1831; Matricaria discoidea DC.

Common names: Pineapple weed, false chamomile, rayless chamomile

Erect or ascending annual herb emitting pineapple like smell when leaves are crushed; leaves alternate up to 5 cm long, 2-pinnatisect with linear up to 2 mm wide ultimate segments; heads discoid, 7-12 mm across, conical, greenish yellow; involucre bracts oblong with broad hyaline margin and obtuse apex; florets tubular, 5-lobed; achene with a white corona. 

Common in Kashmir along roadsides and wastelands, leaves resembling Anthemis cotula.


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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

Gurcharan Singh

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Jun 11, 2013, 10:05:06 AM6/11/13
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Attaching photographs which I missed earlier

Gurcharan Singh
Matricaria-matricaroides-below-Matricaria aurea-above-Rainawari-IMG_2315-Kashmir-5.jpg
Matricaria-matricaroides-below-Matricaria aurea-above-Rainawari-IMG_2332-Kashmir-6.jpg
Matricaria-matricaroides-Rainawari-IMG_2315-Kashmir-4.jpg

Nidhan Singh

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Jun 11, 2013, 10:06:00 AM6/11/13
to Gurcharan Singh, efloraofindia
Very nice pics..thanks for showing these species...


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Regards,

Dr. Nidhan Singh
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Department of Botany
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Gurcharan Singh

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May 20, 2016, 6:37:52 AM5/20/16
to Nidhan Singh, efloraofindia
There was no problem till Matricaria matricarioides  (Less.) Porter ex Britton and Matricaria discoidea DC. were considered as synonyms, but now it seems two are treated distinct by both GRIN and The Plant List. It would thus worthwhile to find out differences between two taxa, so that we can place our specimens precisely. May be any researcher will help.

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

Gurcharan Singh

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Jan 6, 2022, 10:17:58 AM1/6/22
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  Friends, thankfully we have now been able to resolve the controversy. Our plant is Matricaria discoidea DC. which is distinct from Matricaria matricarioides (Less.) Porter ex Britt., (treated as synonym of of Tanacetum bipinnatum subsp. bipinnatum) which is very different species as per POWO with depressed globose heads, phyllary margins brown and presence of ray florets as against oblong heads, phyllaries with white scarious margins and absence of ray florets. 
Here is another good images of M. matricarioides


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