Vegetative characteristics Trithuria cowieana is an annual aquatic plant with linear, max. 75 mm long, and 0.3–0.4 mm wide leaves. The plant turns red, once it reaches the flowering stage.
Generative characteristics It is a
monoecious species with bisexual reproductive units ("flowers"). The reproductive units are produced on 2–110 mm long peduncles. They consist of 4–8(–10), 1.2–2.3 mm long, and (0.2)0.3–0.5(0.6) mm wide involucral bracts, as well as 20–40 carpels, and 1–3 stamens with red filaments. The fruit is 0.28–0.41 mm long. The reproductive units are likely to be self-pollinating. ==Distribution==