Seeds of South Australia
Podolepis aristata ssp. affinis (Compositae)
Button Podolepis
List of species for Podolepis
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Seed collecting:
November to January
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Least Concern   (IUCN: )
Fleurieu (KAN02)Kanmantoo
 Least Concern   (IUCN: )
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern   (IUCN: )
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   (IUCN: )
St Vincent (EYB02) 
 Least Concern   (IUCN: )
Talia (EYB04) 
 Least Concern   (IUCN: )
Eyre Mallee (EYB05) 
 Least Concern   (IUCN: )
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern   (IUCN: )
Murray Mallee (MDD02) 
 Least Concern   (IUCN: )
Myall Plains (GAW01)Gawler
 Least Concern   (IUCN: )
Maralinga (GVD03)Great Victoria Desert
 Least Concern   (IUCN: )
Nullarbor Plain (NUL02)Nullarbor
 Least Concern   (IUCN: )
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 Podolepis]
Name derivation:
Podolepis from the Greek 'podos' meaning foot and 'lepis' meaning a scale; referring to the stalked involucral bracts. Aristata from the Latin 'arista' meaning bristle or awn; referring to the involucral bracts which are abruptly contracted into long acuminate points. Affinis from Latin meaning related or allied to or similar to another species.
Distribution:
Found scattered across the southern part of South Australia, growing in a range of habitats including mallee, chenopod scrubland and woodland. Also found in Western Australia, Queensland, New South Wales and Victoria.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Small annual herb to 40 cm tall with one to several brown to reddish, wiry, hairy stems. Leaves woolly, oblanceolate to 12 cm long. Involucral bracts many-seriate with slender linear, glandular claws and lanceolate to ovate lamina to 10 mm long, base obtuse to truncate. Florets yellow. Flowering between August and November.
Fruit type:
White fluffy daisy-head.
Seed type:
Brown ovoid seed to 2 mm long and 0.7 mm wide, covered in small tubercules, with long feathered-like pappus at one end.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect heads that are fluffy. Either pick off the whole heads or use your finger and pull off the seeds from the head. Mature seeds will come off easily.
Seed cleaning:
Place the heads in a tray for a week to dry. No cleaning is required if only pure seeds are collected. If heads are collected, then rub the heads gently with your hands to dislodge the seeds. Viable seeds will be fat and hard. 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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Jul-1623%7 dNA 500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under spring/autumn conditions
Jul-1623%7 dNA 500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under winter conditions
Jul-167%7 dNA leached in water 24 h;
1% agar;
Incubated under spring/autumn conditions
Jul-160%NANA leached in water 24 h;
1% agar;
Incubated under winter conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)