Ludwigia octovalvis

Ludwigia octovalvis (Jacq.) P.H.Raven, Kew Bull. 15: 476 1961 publ. 1962. (syn. Epilobium fruticosum Lour.; Jussiaea angustifolia Lam. …….; Jussiaea suffruticosa var. angustifolia Kuntze ………….; Jussiaea venosa C. Presl .; Ludwigia angustifolia (Lam.) M. Gómez; Ludwigia octovalvis var. ligustrifolia (Kunth) Alain ………; Ludwigia pubescens var. ligustrifolia (Kunth) H. Hara ..; Ludwigia sagreana (A. Rich.) M. Gómez .; Oenothera octovalvis Jacq.);
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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;
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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;
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false primrose, Mexican primrose willow, swamp primrose, water primrose, willow primrose, yellow willow herb • Marathi: पानलवंग panlavang • Sanskrit: भूलवंग bhulavangah • Telugu: నిరుఅగ్నివేండ్రపాకు neeru-agnivendrapaku;
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As per efi thread :
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;
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ID requested of DSC01279: 1 image.
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.

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

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.

Ludwidgia erecta

I think closer to Ludwigia octovalvis (Jacq.) P.H.Raven as per comparative images at
https://efloraofindia.com/2011/03/12/ludwigia/
I think Ludwigia erecta (L.) Hara is not reported from India as per CoL

This is Ludwigia octovalvis (Jacq.) P.H.Raven as per images and details herein and as per Flora of Peninsular India

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