General Description:
Duperreya is a small genus of three species, all of which are native to Australia. They are mainly perennial herbs, low shrubs or twining plants. The three species were previously classified in the genus Porana. The plant family Convolvulaceae includes several invasive weed species including Convolvulus arvensis (Field Bindweed) and Ipomoea indica (Morning Glory).
Duperreya sericea (previously Porana sericea) is a twining, perennial herb with stems covered with silky, silvery hairs, giving a soft, greyish appearance . The leaves are linear to narrow-elliptic and usually 10–30 mm long and 2–6 mm wide. They are densely covered with silvery-grey hairs. The circular, blue to purple flowers are about 15-20 mm diameter and have a shallow, funnel shape. They occur mainly in spring to summer but can be found at other times of the year. Like most members of the Convolvulaceae, the individual flowers last only a single day.
Duperreya sericea has not been widely cultivated. It could be a useful plant in drier climates and is unlikely to be vigorous enough to become a nuisance by twining among other plants. Its longevity in cultivation is not known at this stage. It should tolerate most reasonably drained soils in a sunny position and should tolerate extended dry conditions once established. It may also be a useful plant for growing in containers, including hanging baskets.
Propagation can be carried out from seed but the hard seed coat needs to be carefully nicked with a knife to expose the embryo and enable successful germination. Cuttings of firm, current season’s growth should strike readily.
Duperreya sericea
Photo: Brian Walters
Australian Native Plants Society (Australia)