Bunchy sedge
Cyperus polystachyos
family
Cyperus polystachyos
origin
Native
declaration
NIL
For information only
Common names
Coast flatsedge, Many spiked sedge, Texas sedge.
A tufted, long-lived, grass-like plant with upright flowering stems growing up to 80 cm tall. Its rigid stems (1-3 mm thick) are hairless and triangular in cross-section its very narrow leaves (1-4 mm wide) are grass-like in appearance and tufted at the base of the plant. Its seed-head is an irregular cluster of brownish-coloured spikes subtended by three to six green leafy bracts this seed-head may be unbranched or with several short branches up to 6 cm long its elongated flower spikelets (5-15 mm long and about 2 mm wide) are borne in dense clusters.
Impact
Impact
Bunchy sedge (Cyperus polystachyos) is similar to rice flat-sedge (Cyperus iria), drain flat-sedge (Cyperus eragrostis) and dirty Dora (Cyperus difformis). These species can be distinguished by the following differences: bunchy sedge (Cyperus polystachyos) has unbranched or shortly branched seed-heads that turn brownish or yellowish-brown as they mature. The pointed flower spikelets are densely packed in a single stalkless cluster or in irregularly shaped clusters at the tips of the short branches rice flat-sedge (Cyperus iria) has branched seed-heads that turn golden-yellow in colour as they mature. The flower spikelets are loosely arranged in elongated clusters at the tips of the branches drain flat-sedge (Cyperus eragrostis) has branched seed-heads that turn golden-yellow or yellowish-brown as they mature. The flower spikelets are densely packed in rounded clusters at the tips of the branches dirty Dora (Cyperus difformis) has branched seed-heads that turn reddish brown or dark brown as they mature. The flower spikelets are densely packed in rounded clusters at the tips of the branches.
Location
Location
Characteristics
Characteristics
Similar Species
Similar Species
Bunchy sedge (Cyperus polystachyos) is similar to rice flat-sedge (Cyperus iria), drain flat-sedge (Cyperus eragrostis) and dirty Dora (Cyperus difformis). These species can be distinguished by the following differences: bunchy sedge (Cyperus polystachyos) has unbranched or shortly branched seed-heads that turn brownish or yellowish-brown as they mature. The pointed flower spikelets are densely packed in a single stalkless cluster or in irregularly shaped clusters at the tips of the short branches rice flat-sedge (Cyperus iria) has branched seed-heads that turn golden-yellow in colour as they mature. The flower spikelets are loosely arranged in elongated clusters at the tips of the branches drain flat-sedge (Cyperus eragrostis) has branched seed-heads that turn golden-yellow or yellowish-brown as they mature. The flower spikelets are densely packed in rounded clusters at the tips of the branches dirty Dora (Cyperus difformis) has branched seed-heads that turn reddish brown or dark brown as they mature. The flower spikelets are densely packed in rounded clusters at the tips of the branches.
