India (marsh places in plains and low hills), Australia, Bangladesh, China, Japan, Malaysia, Pacific Islands, SE Africa, Taiwan and Tropical America as per The Genus Ludwigia (Onagraceae) in India by I.C. Barua- Rheedea Vol. 20 (1) 59-70 2010;

USA (Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Texas), Bahamas, Cayman Isl., Cuba, Hispaniola, Jamaica, Puerto Rico, Virgin Isl. (St. Croix, St. John, St. Thomas, Tortola), Lesser Antilles (Antigua, Barbados, Dominica, Grenada, Guadeloupe, Martinique, Montserrat, St. Lucia, St. Martin, St. Vincent), Isla Margarita, Tobago, Trinidad, Peru, Panama, Colombia (Amazonas, Antioquia, Arauca, Caquet, Cauca, Choc, Crdoba, Cundinamarca, Guaina, Huila, Magdalena, Meta, Nario, Norte de Santander, Putumayo, San Andrs, Providencia y Santa Catalina, Santander, Tolima, Valle, Vaups, Vichada), Venezuela (Amazonas, Anzoategui, Apure, Aragua, Barinas, Bolivar, Carabobo, Cojedes, Delta Amacuro, Distrito Federal, Falcon, Guarico, Lara, Merida, Miranda, Monagas, Nueva Esparta, Portuguesa, Sucre, Tachira, Trujillo, Yaracuy, Zulia), Ecuador, Nicaragua, Bolivia (Beni, Cochabamba, La Paz, Santa Cruz, Tarija), N-Brazil (Para, Amazonas, Acre), NE-Brazil (Maranhao, Ceara, Paraiba, Pernambuco, Bahia), WC-Brazil (Goias, Distrito Federal), SE-Brazil (Minas Gerais, Sao Paulo, Rio de Janeiro), Argentina (Chaco, Corrientes, Entre Rios, Misiones, Santa Fe), S-Brazil (Parana, Santa Catarina), Chile (Tarapaca), Paraguay (Alto Paraguay, Amambay, Central, Cordillera, Paraguari, Pres. Hayes), Mexico (Aguascalientes, Baja California Norte, Baja California Sur, Campeche, Chiapas, Chihuahua, Coahuila, Colima, Durango,
Guanajuato, Guerrero, Hidalgo, Jalisco, Mexico State, Michoacan, Morelos, Nayarit, Nuevo Leon, Oaxaca, Puebla, Queretaro, Quintana Roo, San Luis Potosi, Sinaloa, Sonora, Tabasco, Tamaulipas, Veracruz, Yucatan, Zacatecas), Guyana, Surinam, French Guiana, Costa Rica, Guianas, Belize, El Salvador, China (Fujian, Guangdong, Guangxi, Guizhou, Hainan, Jiangxi, Sichuan, Yunnan, Zhejiang), Taiwan, India, Myanmar [Burma], Singapore (I), Thailand, Vietnam, Laos, Cambodia, Sri Lanka, Japan (Kyushu), Ryukyu Isl., peninsular Malaysia, Java, Sumatra, Borneo, Philippines, Moluccas, Lesser Sunda Isl., New Guinea, Bismarck Arch., Solomon Isl., Andaman Isl. (North Andaman Isl., Middle Andaman Isl., South Andaman Isl., Little Andaman Isl.), Nicobar Isl. (Car Nicobar Isl., North Nicobar Isl., Central Nicobar Isl., Great Nicobar Isl., Little Nicobar Isl.), Myanmar [Burma] (Bago, Mandalay, Sagaing, Shan, Taninthayi, Yangon), Bhutan, Darjeeling, Nepal, Australia (N-Western Australia, Northern Territory, Queensland, N-New South Wales), New Caledonia, Western Samoa, Fiji, Cook Isl. (I) (Rarotonga (I)), American Samoa (Tutuila, Aunu’u, Ofu, Olosega, Ta’u),
Gilbert Isl. (Butaritari, Tarawa, Onotoa), Marquesas Isl., Marshall Isl. (Likiep, Majuro, Arno, Jaluit), Micronesia (Yap, Ulithi, Woleai, Faraulap,
Ifaluk, Lamotrek, Namonuito, Murilo, Nomwin, Truk, Moen, Dublon, Tol, Losap, Namoluk, Lukunor, Satawan, Kapingamarangi, Ant, Pohnpei, Mokil, Pingelap, Kosrae), N-Line Isl. (Palmyra Atoll, Washington Isl.), Palau Isl. (Babeldaob, Koror, Ngarakabesang, Angaur), Rotuma Isl., Western Samoa, Society Isl. (Raiatea, Tahiti, Moorea, Tupai, Huahine, Raiatea, Tahaa, Maupiti), Southern Marianas (Saipan, Tinian, Rota, Guam), Tokelau (Fakaofo, Swains Isl.), Tonga (Tongatapu, ‘Eua), Tuvalu (Nui Atoll), Austral Isl. (Tubuai), Bonin Isl. (Chichijima), Hawaii (Kauai, Oahu, Molokai, Lanai, Maui, Hawaii Isl.), Senegal, Gambia, Guinea-Bissau, Guinea, Sierra Leone, Liberia, Mali, Burkina Faso, Niger, Chad, Sudan, South Sudan, Ivory Coast, Ghana, Togo, Benin, Nigeria, Cameroon, Central African Republic, Bioko Isl. (Fernando Poo), Sao Tome, Equatorial Guinea, Gabon, Congo (Brazzaville), D.R.Congo (Zaire), Uganda, Rwanda, Burundi, Kenya, Tanzania, Angola, Zambia, Zimbabwe, Malawi, Mozambique, Seychelles (I), Mauritius, La Runion, Rodrigues, South Africa (Limpopo, North-West Prov., Mpulamanga, KwaZulu-Natal, E-Cape Prov.), Swaziland, Namibia, Botswana, Madagascar, Cape Verde Isl. (Ilha de Sao Tiago)
as per Catalogue of Life;
false primrose, Mexican primrose willow, swamp primrose, water primrose, willow primrose, yellow willow herb • Marathi: पानलवंग panlavang • Sanskrit: भूलवंग bhulavangah • Telugu: నిరుఅగ్నివేండ్రపాకు neeru-agnivendrapaku;
 
In L. octovalvis the sepals are 0.5-1.2cm long petals are 0.6-1.8cm long whereas in L. perennis it is less than 0.5 cm for both sepals and petals;
.
Picture taken in Asansol (West Bengal) on 27/05/11, 8:29AM. Seen growing near/in ponds & swamps, roots completely submerged in water but leaves & flowers normally seen above water.


Agreed. This looks the False Primrose [Ludwigia octovalvis] locally called Pan-lavang.



 

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Flora from Cuttack for ID 23072013 CS2 : Attachments (2). 4 posts by 2 authors.

Another weed from rice fields of Cuttack. Possibly Ludwigia ?


I agree with you, these are common here too, maybe Ludwigia parviflora Roxb. – http://plantillustrations.org/illustration.php?id_illustration=44981.


Yes it does seem like L. parviflora which is a common weed of rice.


I think it is more closer to Ludwigia octovalvis (Jacq.) Raven as per keys at Ludwigia as per The Genus Ludwigia (Onagraceae) in India by I.C. Barua- Rheedea Vol. 20 (1) 59-70 2010 (pdf available in this efi thread) rather than images at Ludwigia perennis L.



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16112011-BS-1 Ludwigia sp from Amin Kurukshetra for id: Ludwigia sp from Amin Kurukshetra for id
Small herb- about 1 ft high.
Found growing wild near a wetland area
in Amin Kurukshetra (260mts)
looks diffrent than L octavalvis
Pls id


Please check Ludwigia linifolia of Onagraceae family

Please refer the key if the pdf I sent in an earlier thread as well.

I think it is more closer to Ludwigia octovalvis as per images and details herein and as per keys at Ludwigia as per The Genus Ludwigia (Onagraceae) in India by I.C. Barua- Rheedea Vol. 20 (1) 59-70 2010 (pdf available in this efi thread) rather than images at Ludwigia hyssopifolia


LUDWIGIA PARVIFLORA : 5 posts by 3 authors. Attachments (1)
Attaching a collage of Ludwigia parviflora (??).

this must a weed highly undesired by farmers. when I searched. one of the top pages was http://www.kisansuvidha.com/product-tag/ludwigia-parviflora/
which is nothing but weed-killer chemicals selling site!!!
further down, our page shows up…. for Ludwigia perennis

synonyms are …


It is more closer to Ludwigia octovalvis (Jacq.) P.H.Raven rather than Ludwigia perennis L., as per images herein.



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LUDWIGIA SPECIES : (mixed thread): 5 posts by 4 authors. 1 correct image- 1st.

Attaching three collages related two Ludwigia sp. Both the species are available here. Size of the flowers are distinctly different.

Please help to identify correctly.

1st is Ludwigia octovalvis (Jacq.) P.H.Raven and 2nd is Ludwigia perennis L. as per comparative images at Ludwigia



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OOTHECA ( EGG CASE ) ON LUDWIGIA OCTOVALVIS : 4 posts by 4 authors. Attachments (1)

In my childhood I have seen froth like substance on some plants. Elders used to tell the substance is the spit of Monitor Lizard and is poisonous. I heard another story narrated by an old lady. As per that story the substance is the spit of ghost (BHOOT). But literature says it is the egg case of some insect (may be praying mantis). Other day I saw this substance on a Balsam plant. In the attached image ootheca is on Ludwigia octovavis.


NyTimes


Journal of experimental biology has nice paper this year’s february

but I am not sure we have this same species in West Bengal. does any body have data?



Herbaceous weed id please : 6 posts by 3 authors. Attachments (1)- 2 mb.

Request for id of a herbaceous weed from Bilaspur. Photographed today morning (3.10.20).


Is it Ludwigia alternifolia?


Yes, it resembles …, once go through local keys and then conform,


To me appears close to Ludwigia octovalvis (Jacq.) P.H.Raven as per details and comparative images at Ludwigia

Ludwigia alternifolia L. is not found in the area as per Catalogue of Life.



7 images. In our society since rainy season I am observing a small reddish plant in our club house railings. Few days back got chance to have a closer look. I think it is Ludwigia octovalvis ???? Few small saplings are also observed around our garden.
PLease confirm.
Location – Pune Kothrud

Date: 11-11-2020


Ludwidgia erecta


I think closer to Ludwigia octovalvis (Jacq.) P.H.Raven as per comparative images at

I think Ludwigia erecta (L.) Hara is not reported from India as per CoL



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References:

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