Geijera sp (Rutaceae)


Geijera Genus

Geijera is an endemic Australian genus from the Rutaceae, the same family as citrus. Limited to about five recognised species from the inland to the forests of the eastern seaboard.

Geijera parviflora

Wilga, Native Willow

Small to medium ornamental tree (6-12m) from inland areas of all mainland states. It has a pendulous foliage giving it some similarity to the Europen willow from a distance. The foliage sweeps on the ground, except where sheep or cattle have been grazing upon the foliage. The foliage is generally aromatic when crushed and leaves are covered in oil glands.
Some types are much loved by stock, others are left alone, which appears to be related to variation in their chemical constituents. Un fortunately this has caused this once common outback tree to become fairly rare in some areas due to stock eating young plants before they can become established.
Suitable as a shade or street tree for inland areas, it is hardy and appears relatively adaptable, though a bit difficult to propagate.

One of the reported uses of this species traditionally, is as a kind of 'narcotic'. Leaves were baked , powdered and smoked in conjunction with other narcotic plants (species?) and apparently used in ceremonies, and reported to induce "drowsiness and drunkenness". Chewed leaves were placed in cavities to stop toothache. Leaf infusion used internally for pain relief.

There appears to be a few chemo-types of this species, some containing different coumarins and essential oils.


Some references for research work on different Geijera sp from Plants for Medicines, CSIRO, 1990.

Terpenoid chemistry VII The structure of geijerine, M Sutherland, Aust J Chem, 1964, 17:75-91

Some extractives of Geijera salicifolia, Ritchie & Taylor, Aust J Chem,1968 21:1381-2

Geijerin: a new coumarin from the bark of Geijera salicifolia, Lahey et al, Aust J Sci Res, 1955 8:125-8

Coumarins of Geijera parviflora, Lahey et al, Aust J Chem, 1967, 20:1943-55

Alkaloids of Geijera salicifolia, Johns et al, Aust J Chem, 1966, 19:1991-4

Other references

Australian Medicinal Plants, Lassak and McCarthy, Methuen, 1985.