Trying to keep it as simple as possible (but also fearing technical
differences may get blurred) for easy identification:
1. Inflorescence a head on raised stalk
2. Plants with thick reddish leaves, atleast ¾ as broad as
long; cultivated as
hedge/border plant ..……………………………..1. *A. brasileana (i*
ncl.* A. dentata)*
2. Leaves not reddish, less than ½ as broad as long; wild
plant of moist or aquatic
habitats. ………………………………………….2. *A.philoxeroides.*
1. Inflorescence a sessile head in leaf axils
3. Plants prostrate, mat-forming
4. Leaves atleast ¾ as broad as long, stems and leaves rigid;
flowers (tepals)
spine-tipped…………………………………3. *A. pungens*
4. Leaves usually less than ½ as broad as long, stems and leaves
soft; flowers
(tepals) not spin-tipped……………………..4. *A. paronychoides*
3. Plants erect or spreading not mat-forming
5. Leaves sessile, linear or narrowly oblanceolate; plant of moist
or
wet situations………………………………. 5. A. sessilis
5. Leaves with distinct petiole; mostly cultivated
6. Leaves green or tinged with purple; mostly oblanceolate,
gradually narrowed into petiole, less than ½ as broad
as long…………………………….6. *A. bettzickiana* (incl.* A.
amoena*
and *A. versicolor*)
6. Leaves green, not tinged with purple; mostly
elliptic-ovate, more
than ½ as broad as long, more sharply narrowed into
short
petiole…………………..……………... 7. *A. ficoidea*
No decision/information yet on A. pulchella, although it is listed on the
net profusely.
--
Dr. Gurcharan Singh
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/
On Sat, Nov 28, 2009 at 2:58 PM, Satish Phadke <[email protected]>wrote:
> From whatever descriptions emerged I have prepared a simple practical key
> for guiding to the ID of Alternanthera species. Final Id confirmation has to
> be made by looking at all the characters.
> *The thread is open for suggestions and corrections if
> any......................*
> 1)Colour of leaves red brown; cultivated garden plant........*A.brasiliana
> *
> 2)Sessile linear leaves...................................................
> *A.sessilis*
> 3)Plant carpet like; leaves orbicular or ovate3*3cm...........*A.pungens*
> 4)...................similar....not much info............................*
> A.pulchella*
> 5) Erect tufted herbs; small
> petiole................................*A.ficoidea
> or*
> Erect branched herb ................................................*
> A.bettzichiana*
> .................may be syn..As per BSI Mah.......................*
> A.tenella* var.versicolour
> 6)Aquatic herb; flowers in globose heads........................*
> A.philoxeroides.*
> This is an humble attempt some corrections might erupt..
> Dr Satish Phadke
>
> 2009/11/28 J.M. Garg <[email protected]>
>
> Dear members,
>> Singh ji has posted six species of Alternanthera recently.
>> He has also stated in one of the threads that "... the Alternanthera
>> species on our databases need to be sorted out...".
>> In view may I request the members to pl. have a re-look at their
>> Alternanthera species in Indiantreepix Database or otherwise & post them for
>> sorting out in case they have any doubts.
>> --
>> With regards,
>> J.M.Garg ([email protected])
>> http://en.wikipedia.org/wiki/User:Jmgarg1
>> 'Creating awareness of Indian Flora & Fauna'
>> Image Resource of more than a thousand species of Birds, Butterflies,
>> Plants etc. (arranged alphabetically & place-wise):
>> http://commons.wikimedia.org/wiki/Category:J.M.Garg
>> For learning about Indian Flora, visit/ join Google e-group-
>> Indiantreepix:http://groups.google.co.in/group/indiantreepix?hl=en
>>
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>
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