Cynara cardunculus (artichoke thistle, cardoon) DP and C. scolymus (globe artichoke) are originally from the Mediterranean, and have occasionally escaped from gardens in the lower south-west. They are perennials, with very large, greyish woolly leaves and spherical, thistle-like, bluish flowering heads in early summer.

Cynara cardunculus , PH

Dimorphotheca ecklonis (=Osteospermum echlonis ) (veldt daisy) is a woody perennial that can root at the nodes. The large (8 cm) daisy flowers have bluish-white ray florets and blue disc florets. A purple colour form can also be found. It flowers in winter and spring. Occasional around settlements, often growing from dumped garden rubbish. Native to South Africa.

Dimorphotheca ecklonis , PH

Dittrichia is native to southern Europe, and two species are naturalised in Western Australia. D. graveolens (stinkwort) is a summer-growing annual common along roadsides, in paddocks and waste ground throughout the south-west. It is a stiffly upright, much-branched plant, covered with sticky hairs, each branch bearing many small flowers with yellow ray florets. It flowers in late summer and autumn. If crushed, it has a strong, unpleasant smell, and can cause contact dermatitis, poison stock and also taint milk.

Dittrichia graveolens , RC

D. viscosa was first noted at Albany port some 20 years ago. It has now spread along roads and railways to Jerramungup, Mt Barker and Walpole. It is a low woody shrub, with greyish, felty, entire leaves and sprays of brilliant yellow flowers in winter. It also has been known to poison stock and cause contact dermatitis.

D. viscosa , PH

Emilia sonchifolia (red tassel flower) is a straggling annual with ovate or spoon-shaped toothed leaves and cylindrical pink flower heads without ray florets, produced in autumn. Found in disturbed sites in the Kimberley. Native to tropical Africa and Asia.
Eupatorium adenophorum (also known as Ageratina adenophora) (Crofton weed) is a sticky-hairy perennial to 2m tall. It has ovate leaves and tiny heads terminating the stiff lateral branches. Flowers in summer. A native of Mexico, it has been found occasionally in the Perth area. It may cause a serious lung disease in horses that graze it.
Filago gallica (slender cudweed) is an inconspicuous grey-hairy annual with small linear leaves and small flower heads in their axils. Flowers in late spring and early summer. Found in disturbed areas on the edge of the Darling Scarp in the Metropolitan area and in the wetter south-west but may be more widespread. Native to Europe.

Filago gallica , PH

Galinsoga parviflora (gallant soldiers, potato weed) is an erect, branched annual with ovate leaves. Flowers with yellow centres and a few short white ray florets, produced in spring. A very common weed of horticulture in Perth, also found in gardens in the Metropolitan area and in the southern Swan Coastal Plain. Native to South America.

Galinsoga parviflora , GK

Gamochaeta and Gnaphalium (cudweeds). This worldwide group of some 200 species with three native and six naturalised species in Western Australia, all have small flower heads with no ray florets. They are difficult to identify, and there are several closely related genera. Consult a specialist text to be certain. Gamochaeta americana (spiked cudweed) has a basal rosette of leaves, smooth above and densely white-felted below, and whitish ascending leafy stems with numerous small flowers in a dense spike. Common in lawns and wasteland in the Metropolitan area. Native to South America.

Gamochaeta americana, SE

Gamochaeta falcata is an annual with a densely woolly, spike-like, leafy inflorescence. The leaves are spoon-shaped and somewhat woolly. Native to America, it occurs as a weed of lawns in the Metropolitan area and occasionally in wetlands from Perth to the Stirling Range. Gnaphalium polycaulon is a white-woolly annual, with several upright stems branching from the base. It flowers in autumn; the heads are arranged in terminal, cylindrical spikes and the bracts are straw-coloured. (The rather similar Pseudognaphalium has its heads in globular clusters.) Occasional along creeks from Dorre Island to the Kimberley, originally from India. (See also the similar genera Pseudognaphalium and Vellereophyton.)

Gamochaeta falcata , SE