Myriophyllum tuberculatum

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Myriophyllum tuberculatum


Aquatic or semi-aquatic. Flowers solitary, sessile, in the middle and upper leaf-axils, mostly all ☿, rarely the upper flowers ♂, sometimes the lower ♂. Sepals very small, ± orbicular, entire or finely serrate, erect, 0.1-0.25 by 0.1-0.25 mm. Petals in and after anthesis patent and finally recurved-circinnate, not soon caducous, c. ½-1½ mm long. Stamens 4; Fruit quadrangular, between the sharp and alternisepalous ribs slightly concave, indistinctly 4-sulcate, aculeate, finely foveolate, c. 2-3½ by 2-3½ mm.


Asia-Tropical: Assam (Assam present); India present (Madhya Pradesh present, Orissa present); Lesser Sunda Is. present; Maluku (Maluku present), Australasia: Northern Territory (Northern Territory present), Bandjermasin present, Bombay: Bombay present, Cox's Bazar present, E. Pakistan present, Fog Dam Sanctuary present, Halmahera present, Kedah present, Kendari present, Kerala: Alwaye present, Khandala present, Khasya present, Mangoli present, Mysore present, N. Malay Peninsula present, Pedis present, Ruteng present, SE. Borneo present, SW. (Pangkadjene) & SE. Celebes present, Sagor present, Sulu Is present, W. Bengal present, W. Flores present
India (Kerala: Alwaye; Mysore; Bombay: Bombay, Khandala; Madhya Pradesh: Sagor; Orissa; W. Bengal; Assam; Khasya), E. Pakistan (Cox's Bazar), Australia (Northern Territory: Fog Dam Sanctuary); in Malesia: N. Malay Peninsula (Kedah, Pedis), SE. Borneo (Bandjermasin), SW. (Pangkadjene) & SE. Celebes (Kendari), Moluccas (Halmahera; Sulu Is.: Mangoli), and Lesser Sunda Islands (W. Flores: Ruteng). .


See for the differences with M. indicum and M. tetrandrum the key, the figures, and note under the preceding species.


VASUDEVAN & KESAN NAIR 1967: p. 391. – In: J. Bomb. Nat. Hist. Soc.: f. 1-22
Clarke 1878 – In: Fl. Br. Ind.: 432
DC. 1828 – In: Prod.: 69
SCHINDL. 1905 – In: Pfl. R.: 96
SINCLAIR 1955 – In: Bull. Bot. Soc. Beng.: 94
Miq. 1855 – In: Fl. Ind. Bat.: 635
SUBRAMANYAM 1962: Aq. Ang: 17: f. 11
SINCLAIR 1967 – In: Gard. Bull. Sing.: 230
SUBRAMANYAM 1962: Aq. Ang.: 17
MEIJDEN 1969 – In: Blumea: 308
KURZ 1871 – In: J. As. Soc. Beng.: 52
STEEN. 1952 – In: Webbia: 435
Roxb. 1832 – In: Fl. Ind., ed. Carey: 451