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Pontederia hastata L., Sp. Pl.: 288 (1753). (Syn: Calcarunia hastata (L.) Raf. [Invalid]; Carigola hastata (L.) Raf.; Monochoria chinensis Gand.; Monochoria dilatata (Buch.-Ham.) Kunth; Monochoria hastata (L.) Solms; Monochoria hastifolia C.Presl; Monochoria sagittata Kunth; Pontederia sagittata Roxb. [Illegitimate]; Pontederia sagittifolia B.Heyne ex Wall. [Invalid]; Pontederia vaginalis Blanco [Illegitimate]) as per POWO;
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Trop. & Subtrop. Asia to N. Australia as per WCSP;
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Assam, Bangladesh, Borneo, Cambodia, China South-Central, China Southeast, East Himalaya, Fiji; Hainan, India, Jawa, Laos, Malaya, Myanmar, Nepal, New Guinea, Northern Territory, Philippines, Sri Lanka, Sulawesi, Sumatera, Thailand, Vietnam as per POWO;
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Keys as per Flora of China and FoC illustration;
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The leaves are 15-20 cm long, hastate; the flowers are on long pedicels. In M. vaginalis the leaves are 10 cm, ovate-cordate and flowers are sub-spicate.
Besides flowers, perianth segments of withered flowers are seen twisted around the fruit in a cork screw manner. This is another character of M. hastata compared to M. vaginalis.
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Arrow Leaf Pondweed, arrow-leaf monochoria, hastate-leaf pondweed, monochoria • Hindi: लौंकिया Launkia • Bengali: Nukha;
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Flora of Chakrata: Monochoria vaginalis from Assan barrage Dak Pathar:
Monochoria vaginalis from Assan barrage Dak Pathar growing on the bank of Lake the leaves are 15-20 cm long, hastate; the flowers are on long pedicels. In M. vaginalis the leaves are 10 cm, ovate-cordate and flowers are sub-spicate. This plant is hence M. hastata. Fully agree with your ID Besides flowers, perianth segments of withered flowers are seen twisted around the fruit in a cork screw manner. This is another character of M. hastata compared to M. vaginalis.
Herb for Id : 240912 RV 3: Plz Id this herb growing on the same patch I spoke about on my last mail….. This should be Monochoria hastata…Pontederiaceae..
Monochoria hastata from Assan Baragge for Validation: Thia aquatic weed (?) was photographed from “Aassan Baragge” near Paonta Sahib in September 2011. I hope this is Monochoria hastata (L.) Solms. Kindly validate/correct. Yes … Very nice photographs This really a great picture set. I am not sure what those helically collied part of the flower is!! It wil be kind if would enlighten me.
As i see today’s “SYMBIOSIS : 224” post, by Bimal Da, i remember i have recorded a similar plant just the day before yesterday. Is my plant a M. vaginalis or a M. hastata (L.) Solms. or some other?
Species : Monochoria hastata (L.) Solms. ???
Bengali name : KOTOPANA (কোতপানা )
Habit & Habitat : wild herb in a paddyfield (flooded lowland), 2 feet to 3 feet tall
Date : 10/8/12 @ 10.20 A.M.
Place : Gobra (Hooghly)
Links used :
The id is correct, …
Eichhornia??: Requested to please identify this species. Picture taken in Asansol (W.B.) dated 31.07.11 time 09:22 AM I think it should be Pontederia hastata as per details and keys herein.
ID……BLUE FLOWERS…….05.11.2011…….S.S…..060: Location- Place, Altitude, GPS-…..On the way to Jaldapara Plant Habit- Tree/ Shrub/ Climber/ Herb- …Herbaceous I think it is a moisture loving plant. Height/Length-….See pic Leaves Type/ Shape/ Size-….see pic Inflorescence Type/ Size-… see pic Flowers Size/ Colour/ Calyx/ Bracts-… see pic I think it should be Pontederia hastata as per details and keys herein.
For identification. – indiantreepix | Google Groups : 1 image. It is common in West Bengal, can be noticed through out the year, grows in marshy areas. Sometime confused with water hyacinth. But I think it is not typical water hyacinth. I THINK IT IS Monochoria hastaefolia Presl (FAMILY- PONTEDERIACEAE). monochoria is also called ovel leaf pondweed check it at http://www.flowersofindia.net/cgi-bin/search.pl This is called Arrowleaf Pondweed (Monochoria hastata to the botanist).
SYMBIOSIS : 224: I think it should be Pontederia hastata as per details and keys herein. . References:
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