Environmental Weeds

Senna pendula var glabrata - Easter Cassia

Senna pendula var glabrata

Family: Caesalpiniaceae

Vine or shrub to 8 m.

Leaves compound, alternate, leaflests 6-12, 15-50 x 10-25 mm, upperside glabrous, underside glabrous or minute hairs near base visible with a lens, petioles 1-2mm long.

Inflorescence an axillary or terminal panicule.

Flower petals 5, yellow, to 15 mm long, calyx yellow, March to September.

Fruit a tardily dehiscent cylindrical pod, 100-140 mm long x 10 mm wide, glabrous, seeds several, black about 6 mm long, March to September.

Local notes: Scattered but common on the Atherton Tablelands.

Control - cut stump and paint with herbicide.

Solanum seaforthianum - Brazilian nightshade, Climbing Nightshade

Solanum seaforthianum

Family: Solanaceae

Vine twiner, spines absent.

Leaves compound or simple and deeply lobed, 40-160 x 40 -110, both sides sparsely clothed in simple hairs, petioles 20-40 mm long.

Inflorescence a leaf opposed panicle.

Flower diameter 20-30 mm, petals 5, purple or blue, calyx green December - August.

Fruit a berry, red, 8-12 x 8-12 mm, glabrous, calyx glabrous or minute hairs along outer edge, seeds numerous, red-brown, about 3 mm long February - August.

Other Impacts: The fruit are poisonous to humans.

Local notes: Scattered but common on the Atherton Tablelands.

Control - most plants can be uprooted as it has a shallow root system, or cut stump with herbicide.

Syagrus romanzoffiana - Cocos Palm

Family Arecaceae

Origin: South America

Fast growing palm tree to 21 m. Sturdy ridged trunk. Leaves green to 4.5 m long, long thin leaflets radiating from the central leaf stem. Flowers small and inconspicuous. Fruit a fleshy orange berry up to 2.5cm long.

Reproduction and dispersal: Cocos Palm reproduces from seeds, which are spread by people, birds, flying foxes and gravity.

Local notes: Observed in rainforest remnants around Yungaburra.

Control - removal of entire plant, or cutting out the heart of the palm.

Syngonium podophyllum - Goosefoot

Syngonium podophyllum

Family: Araceae

Origin: Native to Mexico, Central and tropical South America.

Naturalised distribution: in the coastal districts of northern Queensland.

Habitat: Syngonium prefers moist shady conditions. It is a weed of rainforests, riparian areas and abandoned gardens.

Distinguishing features:

Reproduction and dispersal: Syngonium species can reproduce vegetatively.

Local notes: Scattered infestations around Yungaburra.

Control - removal of entire plant.

Turbina corymbosa - Christmas Vine

Family Convolvulaceae

Vine twiner; exudate clear.

Leaves simple, 30-140 x 20-110 mm, glabrous, petioles 15-75 mm long.

Inflorescence an axillary to terminal many flowered panicle.

Flower diameter 20-30 mm, greenish-cream, or white with yellow band and brown markings in throat, calyx green, May to October.

Fruit a capsule, brown, about 9 mm long x 5 mm wide, 1 valved glabrous, calyx glabrous, seeds 1 brown, 4-5 mm long, minutely hairy, June to November.

Distribution: now naturalised in rainforest, monsoon forest and open forest from Mt Molloy to Malanda.

More weeds

Weeds Why bother? - Declared and significant weeds in Queensland - Lantana - Local Law Declared weeds - Stevia ovata

Environmental Weeds - A - C - D - K - L - R - S - Z (this page) - Weed glossary

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