weed for id

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Mohina Macker

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22-May-2011, 8:39:51 am22/05/11
to indian...@googlegroups.com
this is growing in paddy fields and on bandhs
two weeks ago
please id
regards
mohin macker
IMG_0022 aaa.jpg

Dinesh Valke

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22-May-2011, 8:54:57 am22/05/11
to Mohina Macker, indian...@googlegroups.com
... species of Chrozophora ... most probably C. rottleri.
Few days back similar plant posted by Aarti ji at https://groups.google.com/d/topic/indiantreepix/TcJz485mMp0/discussion
Please wait for comments.

Regards.
Dinesh

Gurcharan Singh

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22-May-2011, 10:15:08 am22/05/11
to Dinesh Valke, Mohina Macker, indian...@googlegroups.com
Dinesh ji
Yes it seems to be Chrozophora rottleri. Although there is some confusion in eFlora of Pakistan, the two species are quite distinct:

Chrozophora rottleri (Geiseler) A.Juss. ex Spreng., Syst. Veg. 3: 850, 1826; Welzen, Blumea 44: 420, Fig. 2, Map1.
syn: Croton rottleri Geiseler; Chrozophora plicata (Vahl) A.Juss. ex Spreng. var. rottleri (Geiseler) Müll.Arg.

Characterised by somewhat erect habit, larger leaves (up to 6 cm long), lighter green, surface uneven above but not folded (plicate), base usually symmetrical, inflorescence longer than leaf at least in fruit; fruit with flat stellate hairs, lepidote (rough, covered with scales, spreading (patent) hairs absent.

Chrozophora plicata (Vahl) A.Juss. ex Spreng., Syst. Veg. 3: 850 1826.

Syn: Chrozophora obliqua Schweinf.; C. prostrata Dalzell & Gibson

Plants prostrate, leaves smaller (up to 3 cm long), darker green, surface strongly folded (plicate), base oblique; inflorescence shorter than leaves; fruit with spreading hairs, stellate hairs three dimensional.

I had uploaded C. plicata recently 

Genus Chrozophora was revised in Blumea:

Welzen, P.C.  van. 1999. Revision and Phylogeny of subtribes Chrozophorinae and Doryxylinae (Euphorbiaceae). Blumea 44: 411--436.


-- 
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://people.du.ac.in/~singhg45/ 

Gurcharan Singh

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22-May-2011, 10:24:06 am22/05/11
to Dinesh Valke, Mohina Macker, indian...@googlegroups.com
I am uploading the Fruit of Chrozophora plicata to make comparison easier. It is unreduced so that it can be enlarged to see the differences.


-- 
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://people.du.ac.in/~singhg45/ 

Chrozophora-plicata-Vikas-puri-Delhi-6.jpg

Dinesh Valke

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22-May-2011, 10:44:17 am22/05/11
to Gurcharan Singh, Mohina Macker, indian...@googlegroups.com
Gurcharan ji ... do we gather that the fruits of C. plicata are coated with downy hair, and considerably smaller in size (compared to that of C. rottleri) ?
Regards.
Dinesh

Gurcharan Singh

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22-May-2011, 11:24:34 am22/05/11
to Dinesh Valke, Mohina Macker, indian...@googlegroups.com
Dinesh ji,  size I may not know, but hairs yes



-- 
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://people.du.ac.in/~singhg45/ 

shrikant ingalhalikar

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22-May-2011, 1:07:56 pm22/05/11
to efloraofindia
As per BSI flora, C. prostrata Dalz.& Gibs. is a prostrate herb, leaf
base subcordate and racemes short and C. rottleri (Gies) Juss. syn C.
plicata Voigt. is an erect herb 80 cm tall, leaf base truncate or
cuneate and racemes elongate. Both, the Alibag plant and Vikaspuri
plant, seem to be the latter. Regards, Shrikant.
>  IMG_0022 aaa.jpg
> 160KViewDownload

Gurcharan Singh

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22-May-2011, 9:58:52 pm22/05/11
to shrikant ingalhalikar, efloraofindia
Shrikant ji
BSI Flora Part 4 containing Euphorbiaceae was publishes in 1985, where as recent revision of genus Chrozophora was published by Welzen in 1999.

Welzen, P.C.  van. 1999. Revision and Phylogeny of subtribes Chrozophorinae and Doryxylinae (Euphorbiaceae). Blumea 44: 411--436.

As per Kew Plant List C. prostrata is considered as synonym of C. plicata. Also C. rottleri and C. plicata are two distinct species with the differences I had given earlier yesterday.


-- 
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://people.du.ac.in/~singhg45/ 

Mohina Macker

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23-May-2011, 6:02:32 am23/05/11
to Gurcharan Singh, Dinesh Valke, indian...@googlegroups.com
many thanks for the all the identitifications.
regards
mohina macker
 
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