Seeds of South Australia
Xanthorrhoea semiplana ssp. semiplana (Liliaceae)
Flat-leaf Grass-tree
List of species for Xanthorrhoea
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Seed collecting:
January to April
Herbarium regions:
Eyre Peninsula, Murray, Yorke Peninsula, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, South Australian Murray-Darling Basin, South East
IBRA regions
Fleurieu (KAN02)Kanmantoo
 Least Concern   [PC susceptible]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern   [PC susceptible]
Southern Yorke (EYB01)Eyre Yorke Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D1+2)   (Definite Decline)   [no records]
Eyre Hills (EYB03) 
 Near Threatened   (Probable Decline)
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [very similar to X caespitosa; edge of range]
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
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 Xanthorrhoea]
Name derivation:
Xanthorrhoea from the Greek 'xanthos' meaning yellow and 'rheo' meaning to flow; referring to the yellow resin that is often produced from the leaves. Semiplana from the Latin 'semi' meaning half and the Greek 'planatus' meaning flat; referring to the leaves which can be flatted on one side.
Distribution:
Found mainly in the southern Mount Lofty Ranges in South Australia, with scattered occurs on the Eyre Peninsula and in the South-east, growing in sandy soil woodland and heathland. Also found in Victoria.
Status:
Native. Common in South Australia. Uncommon in Victoria.
Plant description:
Trunkless shrub to 1 m tall with 1 to many crowns. Leaves transversely narrow-rhombic to very depressed-cuneate in section, to 12 mm wide and 3.5 mm thick, bluish-green, very glaucous. Inflorescence 200-375 cm long, scape 75-200 cm long, 15-30 mm diameter, spike 65-250 cm long, 25-45 mm diameter. with numerous creamy flowers. Flowering between October and November. This subspecies defer from the other subspecies found in South Australia, Xanthorrhoea semiplana ssp. tateana, which have trunks and a much longer and fatter flower spike (inflorescence 180-360 cm long; scape 40-125 cm long, 25-60 mm diameter, spike 140-300 cm long, 25-90 mm diameter 
Fruit type:
Numerous woody capsules maturing to dark brown along the spike. Capsule split into three segments, each containing one black seed.
Seed type:
Flat pyrimid-like black seed to 10 mm long and 6 mm wide.
Embryo type:
Linear under-developed.
Seed collecting:
Cut off fruit spikes that have mature capsules, usually turning dark brown or beginning to split. The seeds inside should be black.
Seed cleaning:
Place the fruit spikes in a tray or bucket and leave to dry for 3-4 weeks or until most of the capsules split. Then shake the fruit spike in a bucket to dislodge the seeds. 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 high, at 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily without any treatment.