Seeds of South Australia
Choretrum spicatum ssp. continentale (Santalaceae)
Spiked Sour-bush
List of species for Choretrum
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Seed collecting:
November to April
Herbarium region:
South Eastern
NRM region:
South East
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Choretrum]
Name derivation:
Choretrum from the Greek 'choris' meaning separate and 'etron' meaning abdomen; referring to a rim that separates the top of the flower stalk to the flower itself. Spicatum from the Latin 'spica' meaning a spike; alluding to the flowers forming along a spike. Continentale from the Latin 'continentalis ' menaing mainland or continent; referring to this subspecies being restricted to mainland Australia.
Distribution:
Found in the upper South-east in South Australia, from Keith to France, growing in sand (including sanddunes), sand over clay and sandy loam, in heath or open eucalypt woodland, frequently in low-lying sites and swamps. Also found in Victoria.
Status:
Native. Rare in South Australia. Rare in Victoria.
Plant description:
A weeping semi-parastic perennial, green shrub to 1.5 m high with soft flexible branches, terete, longitudinally ridged. Leaves persistent, scale-like, sessile, appressed to ascending, slightly incurved or on older leaves, spreading to recurved, triangular to very-narrowly trian to 2 mm long and 0.6 mm wide. Inflorescence of single pedunculate bearing many flowers. Flowers white, occasionally flushed reddish-maroon. Flowering between November and January.
Fruit type:
Green-brown globose fleshy drupe to 5 mm long, with longitudinally ribbed.
Seed type:
Hard brown spherical seeds to 4 mm, with ridges running from end to end.
Embryo type:
Linear underdeveloped.
Seed collecting:
Collect drupes that are maturing, the skin is softens as it ripens. Either collect the drupes from the bushed or the easiest method is to collect ripe fruits that have fallen off the plant on the ground beneath the bushes.
Seed cleaning:
Place the drupes in a bucket of water and rub the flesh off with your hands. Drain the water and wash again if required to remove all the flesh. Then spread the wet seeds on some paper towel and leave to dry. 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 two collections, the seed viability were low to average, ranging from 20% to 73%.
Seed germination:
This species is generally difficult to germinate, it has morphophysiological dormancy and complex germination requirements.