Ludwigia hyssopifolia (G.Don) Exell, Garcia de Orta 5: 471 1957. (syn. Fissendocarpa linifolia (Vahl) Bennet; Jussiaea hyssopifolia G.Don; Jussiaea linifolia Vahl; Jussiaea micrantha Kunze; Jussiaea weddellii Micheli; udwigia linifolia (Vahl) R.S. Rao; udwigia micrantha (Kunze) H. Hara); 
 
N-Brazil (Amazonas, Acre), NE-Brazil (Pernambuco, Bahia), WC-Brazil (Mato
Grosso), SE-Brazil (Minas Gerais, Sao Paulo), S-Brazil (Parana), Guyana,
Surinam, French Guiana, Venezuela (Amazonas, Anzoategui, Apure, Barinas,
Bolivar, Cojedes, Delta Amacuro, Falcon, Guarico, Lara, Merida, Miranda,
Monagas, Nueva Esparta, Portuguesa, Sucre, Tachira, Yaracuy, Zulia), Costa Rica,
Peru, Nicaragua, Ecuador, Isla del Coco, Panama, Colombia (Amazonas, Atlntico,
Bolvar, Caquet, Casanare, Cauca, Choc, Guaviare, Meta, Nario, Putumayo, Valle,
Vaups, Vichada), Mexico (Chiapas, Guerrero, Oaxaca, Tabasco, Veracruz), Cuba,
Lesser Antilles (Dominica, Grenada, Guadeloupe, Martinique, St. Lucia),
Trinidad, Guatemala, Honduras, El Salvador, Nicaragua, Bolivia (Beni, La Paz,
Pando), China (Fujian, Guangdong, Hainan), Taiwan, Bangladesh, peninsular
Malaysia, Sri Lanka, Nepal, Philippines (throughout), Singapore (I), Thailand,
Laos, Cambodia, Vietnam, Sumatra, Sulawesi, Moluccas, Lesser Sunda Isl., New
Guinea, Andaman Isl. (South Andaman Isl.), Nicobar Isl. (North Nicobar Isl.,
Great Nicobar Isl., Little Nicobar Isl.), Myanmar [Burma] (Taninthayi), Bhutan,
India,
Java, Australia (N-Northern Territory, N-Queensland), Cape Verde Isl.
(Ilha de Sao Tiago), Mauritania, Mali, Burkina Faso, Niger, Chad, Sudan,
Senegal, Gambia, Guinea-Bissau, Guinea, Benin, Togo, Sierra Leone, Liberia,
Ivory Coast, Ghana, Nigeria, Cameroon, Central African Republic, Angola, Gabon,
Congo (Brazzaville), D.R.Congo (Zaire), Sao Tome, Principe Isl., Fiji, Christmas
Isl. (Austr. (I)), Marshall Isl. (I) (Likiep (I)), Palau Isl. (I) (Babeldaob
(I), Angaur (I), Yap (I), Pohnpei (I)), Southern Marianas (I) (Rota (I), Guam
(I)), Bonin Isl. (I) (Chichijima (I)), Samoa (I), Micronesia (I) (Pohnpei) (I))
as per Catalogue of life;

India (wet places and rice growing areas of the country up to foothill areas of  Arunachal Pradesh), Sri Lanka to throughout SE Asia, N. Australia, Pacifi c Islands, Tropical America and W. Africa as per The Genus Ludwigia (Onagraceae) in India by I.C. Barua- Rheedea Vol. 20 (1) 59-70 2010;


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Ludwigia sp2 (?) ID Hooghly 16/9/12 SK3: 6 images.

Found this wild herb beside my home today.
Species : UNKNOWN
Habit & Habitat : small wild herb, less than 1 foot tall, stem branched, softly angular and clearly winged
Date : 16/9/12, 10.43 a.m.
Place : Hooghly


This species is closely allied to Ludwigia hyssopifolia (G. Don) Exell., having only petals.

But your specimen with 5 lobes.
Ludwigia hyssopifolia: Herbs; branchlets angled or winged. Leaves 2.5-5 x 1-2 cm, elliptic-lanceolate, base cuneate, apex gradually acute to acuminate, glabrous, membranous; petiole to 1 cm long. Flowers solitary, axillary. Calyx tube narrow; lobes 4, c. 3 mm long, lanceolate, persistent. Petals 4, obovate, yellow. Stamens 8; filaments unequal. Ovary 4-celled; ovules many; stigma 4-lobed. Capsule c. 2 cm long, linear, terete, 8-ribbed. Seeds dimorphic, uniseriate and embedded in endocarp below and pluriseriate and free above.
Please compare with this species.


This 5 petal flower is an exception, there was only this flower when i recorded the attached pictures. However, later i noted that all flowers of the same winged species have four petals. And this is very common in moist land, leaves and base of the stem sometimes red tinged.
I have another plant, posted in June ’12 (https://groups.google.com/d/topic/indiantreepix/J3TAWywxx5k/discussion), and i think that species is also the same as this one.
Thank you very much for the ID.


 Ludwigia prostrata as per the stated link


After a relook at this post i think that i may be wrong, this species may not be the same as in my earlier post, titled “Ludwigia prostrata” at – https://groups.google.com/forum/#!topic/indiantreepix/J3TAWywxx5k/discussion

I agree with Ludwigia hyssopifolia, as have been identified by …



 

Ludwigia prostrata from Hooghly: Attachments (2)

Found this small herb on the steps of a pond.
Species : Ludwigia prostrata Roxb.
Habit & Habitat : wild herb, beside pond
Date : 3/6/12, 9.27 a.m.
Place : Nalikul, Hooghly

found a ref where a line drawing sort of looks different from Surajit’s flower… look at it … and tell me please… http://www.wssa.net/Weeds/Invasive/FactSheets/Ludwigia%20prostrata.pdf


Please refer the following links.


Thank you very much for those reference. What i learn is –
1. 4-winged stem with 4 stamens = L. prostrata
2. 4-angled capsule = L. prostrata
3. glabrous similar plant = L. perennis
Since i didn’t take any petal or sepal measurement, neither have any picture of capsule, i take it simply as Ludwigia sp.


 

Attaching more images that maybe of the same plant, but from different individuals. Also attaching a larger image of the flower.

Attachments (4)


A description of Ludwigia prostrata Roxb., obtained from various source informs –
The images in this post closely suggest that the species is Ludwigia prostrata Roxb.


in this case, as i read the keys and peruse the pdf sent by …
that strikes me still is the long pedicle? for the flower and the long seedpod… both if photographed and depicted in this kind of forum would convince people like me,


I will try to collect more data.


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Attaching more images of the same species and of the same individual as in my first upload. These pictures were taken yesterday (14-06-2012) morning.

Attachments (8)


I think it should be Ludwigia linifolia (Vahl) R.S. Rao (syn: Ludwigia hyssopifolia (G. Don) Exell) as per The Genus Ludwigia (Onagraceae) in India by I.C. Barua- Rheedea Vol. 20 (1) 59-70 2010.

Thank you Sir for the corrected ID, with relevant reference.


Accepted name- Ludwigia linifolia (Vahl) R.S. Rao or Ludwigia hyssopifolia (G. Don) Exell : 1 post by 1 author.

Dr. I.C.Barua in his recent publication The Genus Ludwigia (Onagraceae) in India– Rheedea Vol. 20 (1) 59-70 2010 has given Ludwigia linifolia (Vahl) R.S. Rao as an accepted name with Ludwigia hyssopifolia (G. Don) Exell as a syn. as below:
Ludwigia linifolia (Vahl) R.S. Rao, Fl. Goa, Diu, Daman & Nagarhaveli 1: 179. 1985; Paul in Bull. Bot. Surv. India 40: 17. 1998. Jussiaea linifolia Vahl, Eclog. Amer. 2: 32. 1798, non Poir. 1813. J. hyssopifolia G. Don, Gen. Syst. 2: 693. 1832. J. fissendocarpa Haines in J. Asiat. Soc. Bengal 15: 314. 1919. Ludwigia hyssopifolia (G. Don) Exell in Garcia de orta 5: 471. 1957; Raven in Reinwardtia 6: 385. 1963; Hara, FFl. E. Himal. 1: 224. 1966. Fissendocarpa linifolia (Vahl) Bennet in J. Bombay Nat. Hist. Soc. 67: 126. 1970.   
 
While all other databases & books (including GRIN & The Plant List Ver. 1.1) as given under links at Ludwigia give Ludwigia hyssopifolia (G. Don) Exell as the accepted name with Ludwigia linifolia (Vahl) R.S. Rao as a syn. 
Pl. clarify as to which to follow for efloraofindia.


While photographing Sarus Cranes, I saw it growing a tractored field. 
Sonepat, Haryana, 18 June 09. 
ID help requested.


Ludwigia species.


I feel it may be Ludwigia hyssopifolia as per details from Indiantreepix Database:


Ludwigia perrenis ?

Thank …, this was identified as Ludwigia hyssopifolia by 3 persons including …

 

References:

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