Perennial herb, branches erect or ascending from a creeping rhizomes, 0.3- 0.6 m high, hairs on stems rough to touch. Leaves are green to greyish, oblong-ovate or narrowly ovate. 40- 120 mm long, 10- 40 mm wide, glabrous, rigid, sessile, apex acuminate, base subcordate, slightly clasping branch, margin coarsely and sharply serrate, often slightly revolute/ waxy. Flowers are reddish purple, pale lilac or blue- violet in a terminal dense spike, corolla tube 2-3 times as long as calyx inflorescence lax
Velvet tree pear
Velvet tree pear ( Opuntia tomentosa ) is an erect shrub or small tree 1-8 m tall often with a well-developed trunk to over 40 cm diameter. The dull green stem segments (pads) are flattened, oblong to narrowly elliptic, 15 to 30 cm long, 6 to 16 cm broad and 1.5 to 2 cm thick. It is a weed of roadsides, railways, pastures, grasslands, open woodlands, rangelands, disturbed sites and waste areas.
Wandering jew is a trailing perennial grown for its foliage. The fleshy leaves have two silvery stripes and purple undersides. Flowers bloom intermittently throughout the year. It often causes skin irritations in humans, and dogs kept in yards containing wandering jew have developed rashes.
Eichhornia crassipes (Pontederiaceae)
A perennial aquatic plant, free-floating or anchored in shallow water, usually 10-20cm high but up to 1m when growing in dense mats. It has dark shiny green leaves in rosettes with distinctive, swollen, bladder-like petioles. Pale violet or blue flowers in 8-10 flowered spikes appear from November to April. This aquatic plant invades dams and slow-moving rivers.
Water lettuce is a floating herb in rosettes of grey-green leaves, rosettes occurring singly or connected to others by short stolons. Perennial, mat-forming, usually free-floating aquatic plant, seldom exceeding 150-200 mm in diameter; plants consist of a rosette of leaves with a tuft of long, fibrous roots beneath and resemble floating lettuces
Water poppy is a floating aquatic plant with heart-shaped leaves and delicate light-yellow flowers with three-petals. This tropical American plant can compete with indigenous water lilies and large infestations can block out sunlight to the detriment of other aquatic organisms.
Water primrose is a perennial, sometimes deciduous, wetland shrub that can grow to 3 and 4 metres. It reproduces by seed and there are many small sand-like seeds in 4 to 5 rows within a capsule and can produce soil seed banks of over a million seeds.
Nasturtium officinale (Brassicaceae)
Mat-forming perennial, aquatic plant with erect, creeping or floating hollow stems up to 1m long which roots at the nodes. Bright green leaves with slightly fleshy margins. White flowers in terminal, elongated clusters appear from September to March followed by brown fruits.
The wax tree is a deciduous tree growing up to 10m in height. It flowers in July and the seeds ripen from September to November. The flowers are dioecious, which means that individual flowers are either male or female, but only one sex is found on any one plant, so both male and female plants must be grown if seed is required. The flowers are pollinated by bees.
Callistemon viminal is Weeping bottlebrush (formerly Melaleucaviminalis, also known asWeeping Bottlebrush, is a shrub or small tree in the family Myrtaceae. It is native to the states of New Sotuh Wales and Queensland in Australia where it often occurs along watercourses. It grows up to 8 metres in height and has pendent branches with leaves which are 3 to 7 cm long and 3 to 7 mm in width. The bright red flower spikes, which are 4 to 10 cm in length and about 3 to 6 cm in diameter, occur between spring and summer.