Pontederia hastata


Trop. & Subtrop. Asia to N. Australia as per WCSP;

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;


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.
 
Arrow Leaf Pondweed, arrow-leaf monochoria, hastate-leaf pondweed, monochoria • Hindi: लौंकिया Launkia • Bengali: Nukha;


https://08511630493324166816.googlegroups.com/attach/d77b6f6589290e94/Monochoria%20vaginalis%20(6).JPG?part=0.6&view=1&vt=ANaJVrFatPmGObRhkj8aaOo5WdgGY4QxdRhOKJwArE2fA50s6tNzxvEWnJxqsQh4Oovh4jZKClHUjM7NgqYbqEJqdiICiYrYn5oZLnoiBXFPe17zbRehMDM
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https://08511630493324166816.googlegroups.com/attach/d77b6f6589290e94/Monochoria%20vaginalis%20(1).JPG?part=0.1&view=1&vt=ANaJVrEFXf-VDMF_Wuf5bxAiI7UqPPOpQCIlBnfpDS3hcDDzY6qAcw_1XF6EeXKk_p_p9yegaRr8lq_F5SG48KU3YfHWQDpgE54qE4g0fV99J4mKVn0iYQQ
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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
it is Monochoria hastata 

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.

 
 https://groups.google.com/group/indiantreepix/attach/1940dfbebd5acffd/IMG_5137_1.JPG?part=0.1&authuser=0&view=1
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..


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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.


 
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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, ...
 
 
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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.


 
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https://groups.google.com/group/indiantreepix/attach/cecb8811f41a5537/060%2016-04-2011%2014-35-04.JPG?part=0.4&authuser=0&view=1
ID......BLUE FLOWERS.......05.11.2011.......S.S.....060: Date/Time-......16th April. Afternoon.

Location- Place, Altitude, GPS-.....On the way to Jaldapara
Habitat- Garden/ Urban/ Wild/ Type-..... Wild, in the edge of a road alongside Lemon grass

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.
  
 
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Help me to identify this flowering plant (upto species level, if possible).
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).
 
 https://groups.google.com/group/indiantreepix/attach/8d5f08f8efe9e244/Symbiosis%20224.jpg?part=0.1&authuser=0&view=1
SYMBIOSIS : 224:  Attaching an image of a Bumble Bee on the flower of Monochoria vaginalis.This plant is commonly known as Lesser Water Hyacinth.
I think it should be
Pontederia hastata as per details and keys herein.
 
    
 
 
 
References:
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