Bolboschoenus caldwellii
(V.J.Cook) Soják Marsh Club-rushRhizomatous perennial. Culms 30–90(–120) cm high, 1–3.5 mm diam. Leaves ± erect 2–7 mm wide. Inflorescence a compact head of 3–6 spikelets, or with 1–3 spikelet clusters on branches 1–4 cm long; involucral bracts 4–22 cm long, 1.5–2.5 mm wide. Spikelets 1–2 cm long; glumes yellow-brown, c. 7 mm long, plus awn c. 2 mm long; hypogynous bristles about half as long as nut, usually deciduous; style 2-fid. Nut lenticular with concave faces, broad-obovoid, straw-coloured to dark golden brown, shining, minutely but obviously reticulate, 3.5–4 mm long, 2.5–3 mm diam. Flowers spring–summer.
MuM, Wim, VVP, VRiv, MSB, RobP, MuF, GipP, OtP, WaP, Gold, CVU, DunT, NIS, EGL, EGU, HSF, OtR. All States. New Zealand. Occasional, on margins of fresh to subsaline swamps, slow-flowing watercourses, and in shallow drains.
More slender than the other species, usually with leaves ± erect, with a small clustered inflorescence, and the nut broad and always lenticular, with surface minutely but obviously reticulate under a hand-lens.
Wilson, K.L. (1994). Cyperaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 238–356. Inkata Press, Melbourne.
Spinning
