WEEKLY LETHAL WEED PROFILE: MULLUMBIMBY COUCH

WEEKLY LETHAL WEED PROFILE: MULLUMBIMBY COUCH

A long-lived grass-like plant with long underground runners and upright flowering stems up to 40 cm tall. Its upright stems are three-angled in cross-section and only 0.5-1.5 mm thick. Its bright green leaves (1-3 mm wide) are hairless and sheath the stem at the base. Its pale green seed-heads (6-7 mm long) have three or four green leafy bracts at the base and contain numerous small flower spikelets. Its ‘seeds’ are yellow to reddish-brown in colour and topped with a small projection 1-1.5 mm long.

COMMON NAMES
Also known as: Globe kyllinga, Perennial greenhead sedge, Short-leaf flatsedge,

FAMILY
Cyperaceae

DECIDUOUS
No

FLOWERING TIME
Year round

NATIVE/EXOTIC
Exotic

ORIGIN
This species is widespread in the tropical, sub-tropical and warmer temperate regions of the world and its exact origin in obscure. However, some authors believe it to be native to tropical Asia and the warmer temperate regions of China and Japan.

NOTIFIABLE
No

COUNCIL DECLARATION
SIL – Special Investigation List

KNOWN DISTRIBUTION
This species is very widely naturalised in the coastal and sub-coastal regions of Australia. It is particularly common in the northern and eastern parts of the country (i.e. in the northern parts of Western Australia and the Northern Territory, insouth-eastern, central and northern Queensland, in eastern New South Wales and in the ACT).

HABITAT
A widespread weed that prefers damp and shady habitats. It is most commonly found in gardens, footpaths, lawns, roadsides, pastures, disturbed sites and waste areas, but is also a weed of riparian vegetation, wetlands and some crops.

HABIT
A long-lived (i.e. perennial) grass-like plant with long underground runners (i.e. rhizomes) and upright flowering stems 5-40 cm tall.

(Source: brisbane.qld.gov.au 2015) http://ow.ly/i/dd7Zk

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