Botanic Gardens Trust, Sydney, Australia


Leionema sp. 'Colo River’

The Australian Botanic Garden, Mount Annan - May

Common name -
Scientific name Leionema sp. 'Colo River’
Family  Rutaceae

Genus: From Greek leios, smooth to the touch, and nema, a thread, referring to the 'hilar strand', which is a small piece of tissue joining the hilum (scar on the side of the seed) to the ovule.

Distribution The species is restricted a small area of the Colo River, a couple of kilometres downstream from the confluence of Hungryway Creek, in the Blue Mountains of New South Wales.
Native habitat In the flood zone.

The adult plants grow to 1.5 m x 1.5 m and have starry white flowers.

Flowering/fruiting Flowers in May-June.

Location in Garden

You’ll find it in Bed 4b in the Connections Garden.


First discovered in the early 1960s, this species was not rediscovered until 2000, when Tony Rodd, a botanist formerly of Royal Botanic Gardens, Sydney, was undertaking willow removal on the Colo River, and noticed a small population of these shrubs while having lunch.

It shows considerable horticultural potential and we are trialling it in a range of soils.




Leionema sp. 'Colo River'

Leionema sp. 'Colo River'