Seeds of South Australia
Asterolasia muricata (Rutaceae)
Lemon Star-bush
List of species for Asterolasia
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Seed collecting:
October to December
Herbarium regions:
Southern Lofty, Kangaroo Island
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island
IBRA region
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [western end of KI is stable; eastern end threatened by roadworks]
Fleurieu (KAN02) 
 Endangered   (IUCN: EN B2ab(i,ii,iii,iv,v); D)   (Definite Decline)   [restricted to Newland Head area; grazed]
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 Asterolasia]
Name derivation:
Asterolasia from the Greek 'aster' meaning star and 'lasios' meaning hairy, referring to the stellate tomentum on the leaves. Muricata meaning minutely rough, from the Latin 'murex' meaning shell-fish, referring to the rough texture of the leaves.
Endemic to South Australia and found mainly on Kangaroo Island with a small population on the Fleurieu Peninsula growing in shrubland on sandy soil.
Native. Very rare in South Australia.
Plant description:
Small slender shrub to 1 m high. Branches with dense silvery hairs. Leaves oblong to 14 mm long, muricate above, stellate-tomentose below. Flowers yellow, in the leaf axils. Flowering between August and November.
Fruit type:
Brown papery-capsule with a number of segments, each containing a seed.
Seed type:
Black or mottled bean-like seed to 3 mm long and 1.5 mm wide.
Embryo type:
Linear, fully developed.
Seed collecting:
Collect capsules that are turning brown, with dark seeds in each segment. Keep an eye on the developing capsules as they will split and release the seed quickly. An option is to enclose the developing capsules with a small breathable bag.
Seed cleaning:
Place the capsules in a tray and leave to dry for a week. Then rub the pods with your hands to dislodge the seeds. 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 viability:
From one collection, the seed viability was average, at 50%. This species has high seed predation.
Seed germination:
This species is generally difficult to germinate, it has morphophysiological dormancy and complex germination requirements.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA1220 (3.09 g)50+16-Nov-2006DJD687
Kangaroo Island
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.