穗状黑三棱 sui zhuang hei san leng

Stems emersed, erect, 15-45 cm tall. Leaves 25-55 cm × 3-5 mm, lower keeled on abaxial side. Spikes with many densely arranged heads, 6-11 cm; male heads (6-)8-12, deciduous; female heads 1-3, sessile or rarely lowest one sterile, pedunculate. Female flowers: perianth segments 3-5 × ca. 1.5 mm, lobate to parted at apex; ovary elliptic, with stalk 1.5-2 mm; styles ca. 1 mm; stigmas unilateral, 1-1.5 mm. Fruit 4-5 mm. Fl. and fr. Sep-Oct.

● Shallow water of rivers, swamps, and ponds; ca. 3100 m. NW Yunnan (Gaoligong Shan).

Govaerts (2010. World Checklist of Typhaceae. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 16 Feb 2010) treats this as a synonym of Sparganium fallax.