Seeds of South Australia
Correa backhouseana var. orbicularis (Rutaceae)
Round-leaf Kangaroo Island Correa
List of species for Correa
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Seed collecting:
October to December
Herbarium region:
Kangaroo Island
NRM region:
Kangaroo Island
IBRA region
Kangaroo Island (KAN01)Kanmantoo
 Least Concern   [endemic to KI; undercollected; needs more survey work; correas do cross-pollinate]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Correa]
Name derivation:
Correa named after Jose Francisco Correa de Serra (1751-1823), a Portuguese botanist. Backhouseana name after James Backhouse (1794-1869), an English-born naturalist and Quaker missionary who collected plants in Australia including the type specimen for the species. Orbicularis from the Latin 'orbis' meaning circle or disk and the diminutive 'ulus' meaning little; referring to its little circular leaf shape. It was originally applied by J.M. Black to specimens from Kangaroo Island, but not validly published.
Distribution:
Endemic to South Australia and found only on Kangaroo Island, growing in coastal heath on sand, often over limestone.
Status:
Native. Common in South Australia.
Plant description:
Erect branching shrub to 1 m high. Leaves broadly ovate to circular, to 1.5 cm long, leathery, smooth and glabrous above, densely tomentose with minute hairs beneath. Inflorescence solitary and terminal to short branchlets, the terminal leaves not modified to form bracts. Calyx hemispherical, to 3 mm high, closely rusty-tomentose, margin truncate. Corolla cylindrical, red with yellowish lobes. Anthers well exserted, narrowly oblong or narrowing towards apex. This variety differ from the other variety found in South Australia, Correa backhouseana var. coriacea which have corolla greenish cream to red with yellowish tips to lobes and ovate rather than broad ovate to circular leaves. Flowering between August and November.
Fruit type:
Pale brown capsule enclose by the sepals.
Embryo type:
Linear fully developed.
Seed collecting:
Collect mature capsules, those that are turning a pale straw colour and contain hard seeds, either by hands or place small breathable bags over immature capsules to collect seed. Capsules maybe hard to see as it is enclose by the sepals.
Seed cleaning:
Place the capsules in a tray and leave to dry for a weeks. Then rub the capsules gently by hand to dislodge the seeds. Be very careful as the seed coat is thin and easily damaged. Use a sieve to separate the unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.
Seed germination:
This species has morphophysiological dormancy and can be difficult to germinate.