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Azolla
Azolla pinnata |
Native of Australia.
A floating perennial fern 1-3cm long, pinnately branched.
Often forms a carpet on the surface of slow moving or stagnant water.
Leaves alternate, deeply two-lobed. |
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Bachelors Button
Cotula australis |
A native of Australia.
A small slender herb with carrot-like leaves.
Flower heads terminal, solitary, greenish-white, on slender leafless erect peduncles.
Stems much branched and trailing often taking root near the base
and becoming more erect.
Wide spread and common in moist shady habitats.
Often mistaken for bindii. |
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Bindii
Solvia pterosperma |
Native of South America. A small rosette-forming winter growing annual with stolons forming additional rosettes. Leaves finely divided on short
petioles. Flower heads slightly convex, sessile in rosette, centres forming burrs with short, sharp spines. |
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Burr Medic
Medicago denticulata |
Native to Europe.
An annual with small trifoliate leaves, light green leaflets elliptical, toothed and serrated.
Top leaflet has a longer petiole than the other two.
Axillary stipules deeply toothed.
Flowers are small, pea-like, yellow solitary clusters on thin axillary stems.
Not stoloniferous but produces a fine thick mat with hooked burrs present on stems (seed pods). |
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Canadian Fleabane
Conyza Canadensis |
Native to the Americas.
A summer growing erect, hairy annual herb.
Usually less than 1m high, often with several stems arising from the bases.
Flower heads more than 2mm diameter, pappus white or pinkish |
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Chickweed
Stellaria media |
A native of Europe, now cosmopolitan.
A delicate annual herb with angular stems.
Leaves ovate with pointed tips.
Flowers in leaf terminal cymes, five white petals deeply bisected.
A wide spread garden weed in southern Australia and regarded as a serious weed in crops in many parts of the world. |
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Creeping Oxalis
Oxalis corniculata |
Leaves small trifoliate, heart-shaped on short petioles of equal length.
Flowers small, yellow axillary and bell-shaped.
Tap root if developed, fine slender stems, stoloniferous |
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Crowsfoot
Eleusine indica |
A tufted hairless summer annual grass up to 0.6m high.
Stems upright to sprawling, may form a mat but do not root at the nodes.
Leaves shiny, green and smooth.
Inflorescence usually up to 5-8 racemes with a windmill-like
appearance.
A major weed of mainland states in Australia and tropical areas
around the world. |
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Cudweed
Gnaphalium spicatum |
A short-lived perennial usually below 0.5m high.
Leaves silvery green/grey beneath with woolly hair on under side giving a lighter colour.
Flower heads clustered into terminal heads or spikes. |
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Dandelion
Taraxacum officinale |
A prostrate, rosette-forming, short-lived perennial with a thick tap root.
Leaves deeply divided with margins irregularly toothed, the tips of each lobe pointing towards the base.
Flower heads bright yellow on leafless hollow peduncle.
Seed heads pappus silky white.
A wide spread weed throughout the temperate high rainfall areas of Australia. |
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Kidney Weed
Dichondra repens |
Native to Australia.
A stoloniferous perennial herb rooting at the nodes.
Leaves round kidney shaped on long petioles.
Flowers yellow or white. |
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Mullumbimby Couch
Cyperus brevifolius |
Probably a native of Australia.
A perennial sedge up to 15cm high with creeping rhizomes and shiny green leaves.
Inflorescence a green elongated knob-like spike with up to 100 tiny flowers |
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