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.
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.
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.