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* Indicates a Declared Weed, which must be reported and eradicated. However many of these are far too widespread and little control is being undertaken.

Ranunculus muricatus, rough-fruited buttercup, sharp buttercup, spinyfruit buttercup

Raphanus raphanistrum, Wild Radish (white), Wild radish, white weed, white charlock, wild charlock, cadlock, wild kale, wild turnip, jointed radish

Rhamus alaternus, Buckthorn, Italian Buckthorn. This is a Declared weed in South Australia

Silene gallica varieties, French Catchfly, Common Catchfly, English Catchfly, French Catchfly, French Silene, Gunpowder Weed, Mediterranean Catchfly, Small Catchfly, Small-Flower Catchfly, Small-Flowered Catchfly, Smallflowered Catchfly, Spotted Catchfly, Windmill Pink

Silene gallica var. quinquevulnera, with quinquevulnera meaning 'with five wounds' referring to the red splashed on the petals. Usually pale pink petals with a red centre.

Silene gallica var. gallica, usually pink and white or shades of pink petals.

* Rubus fruticosus, Rubus anglocandicans, Rubus laudatus, Rubus rugosus, and Rubis ulmifolius, Blackberry. All species are declared weeds.

Rumex acetosella, Field Sorrel, Red Sorrel, Sangre de Toro, Sheep Sorrel, Sour Weed

* Rumex hypogaeus, (formerly Emex australis), Doublegee, Spiny Emex, Three Corner Jack, Devil's Thorn. The name Doublegee is derived from Dubbeltge-doorn, the Afrikaan for Devil's Thorn.

Rumex obtusifolius, Broadleaf Dock.

Rumex vesicarius (previously Acetosa vesicaria and formerly Rumex vesicarius), Ruby Dock, Rosy Dock, Bladder Dock, Wild Hops, Pink Dock

Stachys arvensis, Staggerweed, Woundwort, Mint Weed

Sparaxis bulbifera

Other Sparaxis species include S. grandiflora, S. pillansii (Harlequin flower), and hybrids of these.

Sparaxis tricolor, Harlequin flower, an orange sparaxis with a yellow and black centre.

Sparaxis tricolor hybrids can have many colours and patterns

Solanum nigrum, Black Nightshade, Nightshade, Potato Bush, Tomato Bush, Wild Currants

* Silybum marianum, Variegated Thistle, Cabbage Thistle, Spotted Thistle, Gundagai Thistle, Gundy Blessed Milk Thistle, Holy Thistle, Milk Thistle, St Mary's Thistle, Lady's Thistle.

* Solanum linnaeanum, Apple of Sodom, Afghan thistle, Bitter apple, Black-spined nightshade, Dead Sea apple, Devil's apple, Poison apple, Poison bush, Poison weed, Sodom's apple.

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Sprekelia formosissima, Aztec Lily, Jacobean lily. A vivid red flowing bulb from Mexico, Central, and South America.

Stellaria media, Chickweed, Common Chickweed, Bindweed, Chick Weed, Satin Flower, Satin-flower, Starweed, Starwort, Stitchwort, Tongue Grass, White Bird's Eye, Winter Weed.

Tiny flowers that have ten petals, however this has five pairs of petals (fused).

Sherardia arvensis, Field Madder, a paddock weed with tiny four petalled pink flowers.

Sonchus oleraceus and the similar Sonchus asper, Common Sow-thistle, Sow Thistle, Smooth Sow-thistle, Annual Sow-thistle, Swinies, Soft Thistle, Hare’s Thistle, Hare’s Lettuce, Hare’s Colwort, Colewort, Milk Thistle, Common Milk Sow-thistle, Milky Tassel, Milk-weed, Thalaak

Romulea flava, yellow, similar to Guilford Grass

Romulea minutiflora, frutang, lesser Guildford grass, small flower onion grass, small onion grass, small onion-grass, small-flower onion grass, small-flower onion-grass, small-flowered onion grass, small-flowered onion-grass

Romulea rosea, Guildford grass, australis oniongrass, common onion grass, common onion-grass, common romulea, onion grass, onion weed, pink romulea, rosy sand crocus, rosy sand-crocus, rosy sandcrocus

Symphyotrichum squamatum, (Aster subulatus, Symphyotrichum subulatum, Aster squamatus, Symphyotrichum subulatum var. squamatum), known as Bushy Starwort, Annual Saltmarsh Aster, Aster, Aster Weed, Aster-Weed, Eastern Annual Saltmarsh Aster, Saltmarsh Aster, Sea Aster, Slender Aster, Slim Aster, Narrow-leaved Aster, Small Saltmarsh Aster, Wild Aster, Cobbler’s Pegs.

Symphyotrichum squamatum grows up to two metres tall, and has pink at the branch joints. Tiny flowers five millimetres across.

Salvia reflexa, Mint Weed

Senecio elegans, Ragwort, Purple Groundsel, Wild Cineraria, Purple Ragwort, Red-purple Ragwort (bright purple small daisy)