Dioecious herb, glabrous. Scales (3–)4–5(–8) mm long. Leaves firmer than for H. decipiens, green; petiole terete, usually distinctly longer than lamina; lamina narrowly oblong-elliptic, (2.5–)5–6(–7) cm long, 0.5–1.5 cm wide; margin entire; crossveins (10–)14–16(–20) pairs. Floral bracts (4–)5–7(–10) mm long, enclosing a male or a female flower. Male flower with pedicel up to c. 20 mm long at anthesis; perianth 0.5–0.7 mm long. Female flower sessile; hypanthium c. 12 mm long; perianth (0.3–)0.5–1 mm long; styles 6. Fruit (7–)9–11(–13) mm long. Flowers (Oct.–)Nov.–Dec. (Aston 1973).
VVP, GipP, OtP, WPro. Also WA, SA, NSW, Tas. Usually occurring in calm water, in sandy and muddy substrates from low tide to a depth of about 23 metres.
Source:
Conn, B.J. (1994). Hydrocharitaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 129–136. Inkata Press, Melbourne.
