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5. Lemna aequinoctialis Welw. in Ann. Conselho ultram. 55: 578. 1859. Landolt, l.c. 18.1980.
RIZWAN Y. HASHMI & SAOOD OMER
Lemna paucicostata Hegelm.Lemna perpusilla auct. non Torrey: van der Plas
Free floating; fronds pale green, obovate to oblong, flat on both surfaces, 1.5-6 x 0.7-3 mm, asymmetrical, upper surface mostly with a distinct papilla at apex and above node, obscurely 3-nerved; several individuals lying closely. Root solitary and winged, root cap acute. Flowering pocket lateral; spathe open, staminate flowers 2, pistillate flower 1, seed 8-26 ribbed.
Fl. Per.: April-May.
Lectotype: Angola, Distr. Luanda, 1858.F. Welwitsch 206 (STU).
Distribution: Throughout all the warmer regions of both the hemispheres.
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