Lemna tenera

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Lemna tenera

Description

Submerged aquatic, only floating at the surface when flowering. Fruit unknown.

Distribution

Asia-Tropical: Malaya (Peninsular Malaysia present, Singapore present), Burma present, Dindings present, Galang present, Galang I. in Riouw Arch present, Pegu present, Wellesley present
Burma (Pegu, type), in Malesia: Malay Peninsula (Singapore; Wellesley; Dindings), Galang (possibly Galang I. in Riouw Arch., RIDLEY 10374, Sept. 1899, SING).

Notes

Only one collection of flowering L. tenera is known (MOLLER 30 from Singapore); although only a few plants have flowers, all the plants are thickened and it is, therefore, probable that they were floating at the surface; they have stomata at the dorsal side. Some other collections also consist of completely or partly thickened plants. They are very similar to L. perpusilla in their shape and in bearing an apical papilla, however, they can be recognized by their more acute apex and in the absence of a distinct root sheath. L. tenera can easily be distinguished from the related L. trisulca by its entire margin, the absence of a long stipe, and by the fact that only 2-3 fronds remain connected.

Citation

HEGELM. 1895: pp. 293-294. – In: Bot. Jahrb.
Ridl. 1907 – In: Mat. Fl. Mal. Pen.: 52
KURZ 1925 – In: Fl. Mal. Pen.: 132