Carex horsfieldii Boott
Boott, F. (1846) Transactions of the Linnean Society of London 20 : 131. Type: in Insulae Java, Dr. Horsfield.
Tufted sedge, usually flowers and fruits when about 1-2 m tall, sometimes when smaller. Rhizome short.
Basal leaves sword-like, 30-100 x 1-1.5 cm, margins sharp and abrasive. Blades plicate. Old leaf sheaths at base reddish-brown.
Inflorescence terminal, produced on a long peduncle which ends in a series of leafy bracts. Inflorescence a panicle of spikes, each spike consisting of female flowers at the base with a cluster of male flowers at the apex. Anthers about 1.5 mm long. Pollen yellow. Style pyramidally thickened at the base.
First leaves 27-55 x 1 mm. At the tenth leaf stage: leaves sessile, strap-like, margins and the midrib on the lower surface of the leaf blade finely serrate. Venation parallel with 5-7 veins on each side of the midrib. Leaf base clasping the +/- triangular stem. Seed germination time 115 to 418 days.