Seeds of South Australia
Xanthorrhoea semiplana ssp. tateana (Liliaceae)
Tate's Grass-tree
List of species for Xanthorrhoea
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Seed collecting:
January to April
Herbarium regions:
Eyre Peninsula, Yorke Peninsula, Southern Lofty, Kangaroo Island
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Near Threatened   (Probable Decline)   [PC susceptible, burnt, knocked over]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Vulnerable   (IUCN: VU D1+2)   [PC susceptible; < 100 plants]
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)
Talia (EYB04) 
 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. Tateana named after Ralph Tate (1840-1901), a geologist and the first Professor of Natural History at the University of Adelaide.
Distribution:
Endemic to South Australia and found on the southern Eyre Peninsula, York Peninsula, Kangaroo Island and the southern Mount Lofty Ranges; growing on sandy soil.
Status:
Native. Uncommon in South Australia.
Plant description:
Trunk usually more than 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 180-360 cm long; scape 40-125 cm long, 25-60 mm diameter, spike 140-300 cm long, 25-90 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. semiplana, which is trunkless and has a shorter and narrower flower spike (inflorescence 200-375 cm long, scape 75-200 cm long, 15-30 mm diameter, spike 65-250 cm long, 25-45 mm diameter.
Fruit type:
Numerous woody capsules maturing to dark brown along the spike. Capsule split into three segments, each containing one black seed.
Embryo type:
Linear under-developed.
Seed collecting:
Cut off fruit spikes that have mature capsules, usually turning dark brown or begining 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 germination:
Seeds are non-dormant, viable seed should germinate readily without any treatment.