Seeds of South Australia
Podotheca angustifolia (Compositae)
Sticky-heads
List of species for Podotheca
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Herbarium regions:
Nullarbor, Gairdner-Torrens, Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Least Concern
Lucindale (NCP03) 
 Least Concern
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Least Concern   [common after fire; likes sand; annual]
Fleurieu (KAN02) 
 Near Threatened   [common after fire; likes sand; annual]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Near Threatened   [common after fire; likes sand; annual]
Broughton (FLB02) 
 Near Threatened   (Probable Decline)
Southern Flinders (FLB04) 
 Near Threatened   (Probable Decline)
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
St Vincent (EYB02) 
 Near Threatened   (Probable Decline)
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Least Concern
Murray Lakes and Coorong (MDD03) 
 Least Concern
Lowan Mallee (MDD04) 
 Least Concern
Wimmera (MDD05) 
 Rare   (IUCN: RA d(i,ii))
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(ii))
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Yalata (NUL03)Nullarbor
 Rare   (IUCN: RA d(ii))
IBRA regions
DISPLAY ALL
3 of 4 subregionsNaracoorte Coastal PlainLeast Concern
2 of 2 subregionsKanmantooLeast Concern
, Near Threatened
3 of 6 subregionsFlinders Lofty BlockNear Threatened
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Near Threatened
5 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
Murray Scroll Belt (RIV06)RiverinaRare
  (IUCN: RA d(ii))
5 of 8 subregionsGawlerRare
Yellabinna (GVD06)Great Victoria DesertRare
  (IUCN: RA d(ii))
Yalata (NUL03)NullarborRare
  (IUCN: RA d(ii))
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 Podotheca]
Name derivation:
Greek 'podos' foot, 'theke' case, referring to the shortly stipitate achenes and Latin 'angusta' narrow, 'folia' leaves
Distribution:
Common on red sandy soils in mallee, scrub and woodlands.
Plant description:
Sparsely sticky, prostrate to ascending annual herb, 2–30 cm high, with swollen stems. Basal leaves linear, attenuate at the base, 2-8 cm long, cauline leaves linear to narrowly oblanceolate, acute to subacute, 2-6 cm long, 1-3 mm wide, bright-green, glandular-pubescent. Capitula close to the ground, erect, on short leafy peduncles, Florets 10–70, about 20 mm long, yellow. Flowering September - October.
Fruit type:
Achenes 2-3 mm long, greybrown, finely pubescent; pappus bristles 5, equal, 2.5-3.5 cm long, plumose but glabrous near the base.
Seed collecting:
Cut off mature fruiting heads and place in a warm place to dry.
Seed cleaning:
Separate seed from fruit head, remove any unwanted material.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
5200 (2.67 g)
5700 (2.97 g)
~10019-Nov-2004DJD 38
Southern Lofty
31-Mar-200695%-18°C
BGA4200 (2.17 g)100+23-Nov-2004PJA 88
Eyre Peninsula
31-Mar-200695%-18°C
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Mar-1496%8 d17 d
1% agar;
Incubated under winter conditions
Mar-1452%8 d17 d
1% agar;
10/14;  /  10°C/22°C
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)