Eleocharis philippinensis

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Eleocharis philippinensis


Perennial, with short rhizome and long, slender stolons. Stamens 3;


Asia-Tropical: Malaya (Peninsular Malaysia present); New Guinea present; Philippines (Philippines present); Thailand (Thailand present), Bangkok present, Bien Hoá present, Kedah present, Lesser Sunda Is present, Luzon present, Madura present, New Caledonia present, P. Jamdena present, Sumba present, Tainimbar Is present, W. Java present, Waikabubak present, near Djakarta present, tributaries of Goragatabu Creek 17 miles NE. of Port Moresby present, tropical Australia present
Tropical Australia, New Caledonia, Thailand (Bangkok, KERR 11105),Indo-China(Bien Hoa), in Malesia; Malay Peninsula (Kedah), W. Java (near Djakarta), Madura, Lesser Sunda Is. (Sumba: Waikabubak; Tainimbar Is.: P. Jamdena), Philippines (Luzon), New Guinea (tributaries of Goragatabu Creek 17 miles NE. of Port Moresby).


In 1939 referred by SVENSON to E. nuda . I have followed BLAKE, who keeps the two apart, dis- tinguishing E. nuda from E. philippinensis by the terete or trigonous stems, the relatively broader appressed glumes, the distinctly pyriform nut with shallower pitting, the strongly upcurved annulus and the caducous bristles. The specimens of E. nuda in the Kew Herbarium show that E. nuda is clearly distinct.
E. philippinensis is also related to E. plicarhachis (GRISEB.) SVENS. of the West Indies and South America, from which it differs in the slender, elongate spikelet with somewhat spreading glumes, and the larger nuts with more deeply pitted, almost iso- diametric epidermal cells and a wider annulus.
E. ochrostachys differs in the terete or obscurely angular stems, the short spikelet with appressed glumes, the different shape and the transversely linear marking of the nut. As BLAKE pointed out, the outer cells of the nut in E. philippinensis occasionally show a tendency to lengthen transversely, but not to such an extent as to alter the typical character of the nut.
In HEYLIGERS 1316 (CANB), the only collection known from New Guinea, the bristles are very short. This form is also known from Queensland; see S. T. BLAKE, l.c. The plants from the other parts of Malesia and those from continental Asia have long bristles.


Clarke 1923 – In: En. Philip.: 121
KERN 1956 – In: Reinw.: 94
SVENS. 1968 – In: Back.& Bakh.f., Fl. Java 3: 462
S. T. BLAKE 1939: p. 98. – In: Proc. R. Soc. Queensl.: t. 7, f. 7-10
Merr. 1912: Fl. Manila: 114