Neptunia oleracea

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Neptunia oleracea


Perennial, aquatic, floating herb, rooting at the nodes, or suberect rooted herb of damp sites. Leaves: Stipules (usually not evident in floating specimens) membranous, lanceolate, base obliquely cordate, apex acuminate, 5.5-15 by 3-5 mm, glabrous. Inflorescence: Seeds 4-8 per pod, obovoid, compressed, 4-5.1 by 2.7-3.5 mm.


Asia-Tropical: Borneo present; Jawa (Jawa present); Malaya present; Maluku (Maluku present); Philippines (Philippines present); Sulawesi (Sulawesi present); Sumatera (Sumatera present), Burn present, Mindanao present, tropics of both hemispheres present
Tropics of both hemispheres, origin uncertain; in Malesia collected in Malaya, Sumatra, Java, Borneo, Celebes, Philippines (Mindanao), Moluccas (Burn). Cultivated.


Young stems are used as a vegetable.


The names natans and prostrata are both older than oleracea, but as they are dubious and invalid, respectively, they have been discarded.
Backer & Bakhuizen f. [] followed Druce (l.c.), who named this species Neptunia natans, with as type specimen Koenig s.n. in Herb. Linn., no 1228/4, a terrestrial plant with roots, the spikes globular and the stipules small, less than 4 mm. The pod is not bent at a right angle to the stipe and not longer than the persistent calyx. For further details see Kostermans (l.c.).


Backer & Bakh. f. 1968 – In: Fl. Java. p 650
Kosterm. 1979 – In: Ceyl. J. Sci., Biol. Sci. p 257
Backer & Bakh. f. 1963 – In: Fl. Java. p 562
Lour. 1985 – In: Fl. Thailand. p 146
W. & A. 1834 – In: Prod. p 270
Windler 1966 – In: Austral. J. Bot. p 401
Nielsen 1981: p. 27. – In: Fl. Camb. Laos Vietnam. pl. 4: 4-13