Alternanthera nodiflora

Annual, stems ascending to erect, to c. 40 cm long, glabrous except about the nodes and along opposite lines of internerves on young growth. Leaves linear-lanceolate, 1.5–6 cm long, 2–5 mm wide, virtually glabrous; margins sparsely denticulate. Flowers in axillary globular spikes, 6–20 mm diam., opposite pairs of spikes often ± coalescing; bracts and bracteoles subulate, 2–3 mm long; tepals equal, narrowly acuminate, 3–5 mm long, often recurved in the upper part, white, glabrous; anthers usually 3, staminodes absent or very short. Fruit obcordate, c. 1 mm long, 1.5 mm wide. Flowers ?Jan.–Apr.