Alternanthera

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1. Alternanthera bettzickiana (Regel) G. Nicholson
2. A. brasiliana (L.) Kunth
3. A. caracasana Kunth
4. A. ficoidea (L.) P. Beauv.
5. A. maritima (Moq.) Mears [synonym of A. littoralis P. Beauv.]
6. A. peploides (Willd. ex Roem. & Schult.) Urb [synonym of A. caracasana Kunth]
7. A. philoxeroides (Mart.) Griseb.
8. A. polygonoides R. Br. ex Sweet [synonym of A. sessilis (L.) R. Br. ex DC.]
9. A. pungens Kunth
10. A. sessilis (L.) R. Br. ex DC.
11. A. tenella Colla var. tenella [synonym of A. ficoidea (L.) Sm.]
12. A. tenella Colla var. versicolor [synonym of A. pulchella Kunth]

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Indian Herbal Remedies: Rational Western Therapy, Ayurvedic, and Other … edited by C.P. Khare (2004)- Great details-
Alternanthera sessilis

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Mansfeld’s Encyclopedia of Agricultural and Horticultural Crops …, Volume 4 By Peter Hanelt, Institute of Plant Genetics and Crop Plant Research (2001)- Details-

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Aquatic and Semi-aquatic Plants of the Lower Ganga Delta: Its Taxonomy … By Kumudranjan Naskar (1990)- Details-

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Flora of Guntur District, Andhra Pradesh, India (2000)- Details with keys–

Vegetables edited by G. J. H. Grubben (2004)- Details-
Alternanthera sessilis

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Flora of Medak District, Andhra Pradesh, India By T. Pullaiah, Chintala Prabhakar, B. Ravi Prasad Rao (1998)- Details with keys–

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Invasive Alien Plants: An Ecological Appraisal for the Indian Subcontinent By J.R. Bhatt, J.S. Singh, S.P. Singh, R.S. Tripathi and R.K. Kohli (2011)- Details-

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Flora of Davanagere District, Karnataka, India By B. K. Manjunatha, V. Krishna, T. Pullaiah (2004)- Details-
Alternanthera sessilis

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CRC World Dictionary of Medicinal and Poisonous Plants: Common Names … By Umberto Quattrocchi (2012)- Details-

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Encyclopaedia of world medicinal plants, Volume 1 By T. Pullaiah (2006)- Details-

Plant Wealth of the Lower Ganga Delta: An Eco-taxonomical Approach, Volume 2 By Kumudranjan Naskar  (1993)- Details with keys–

Gardening in India By George Marshall Woodrow, G Marshall (1999)- Details- p.82-
Alternanthera amabilis Lem. is a synonym of Alternanthera bettzickiana

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Operation Alternanthera :

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 (incl. 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