Seeds of South Australia
Chrysocephalum eremaeum (Compositae)
Dryland Button-bush
List of species for Chrysocephalum
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Seed collecting:
October to January
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
SUMMARY
Gawler Volcanics (GAW02)Gawler
 Rare   (IUCN: RA d(i,ii))   [eastern extent]
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(i,ii))
Maralinga (GVD03)Great Victoria Desert
 Least Concern
Kintore (GVD04) 
 Least Concern
Yellabinna (GVD06) 
 Least Concern
Carlisle (NUL01)Nullarbor
 Least Concern
Nullarbor Plain (NUL02) 
 Rare   (IUCN: RA d(i,ii))
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern
Dieri (SSD03) 
 Least Concern
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Macumba (STP05) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Data Deficient   [doubtful record]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Lake Pure (CHC07) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Watarru (CER02) 
 Least Concern
Everard Block (CER03) 
 Least Concern
Tieyon (FIN03)Finke
 Least Concern
Pedirka (FIN04) 
 Least Concern
IBRA regions
DISPLAY ALL
2 of 8 subregionsGawlerRare
3 of 4 subregionsGreat Victoria DesertLeast Concern
2 of 3 subregionsNullarborLeast Concern
, Rare
2 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
4 of 7 subregionsStony PlainsLeast Concern
, Rare
, Data Deficient
2 of 4 subregionsChannel CountryLeast Concern
3 of 3 subregionsCentral RangesLeast Concern
2 of 2 subregionsFinkeLeast Concern
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 Chrysocephalum]
Name derivation:
Chrysocephalum from the Greek 'chryso' meaning golden and 'cephalus' meaning a head, referring to the golden flower heads. Eremaeum from the Greek 'eremaios' meaning solitary, referring to the single terminal flower on the stems.
Distribution:
Found  northern  South Australia growing in open sites on sand dunes and sandplains on red sand and rocky soils. Also found in Western Australia, Northern Territory and Queensland.
Status:
Native. Common in South Australia. Common in the other States.
Plant description:
Much-branched herb to 40 cm tall with a perennial rootstock; stems and branches covered in dense woolly hairs. Leaves linear to oblanceolate with a recurved, sometimes undulate margin; acute to apiculate apex, and a broadly sessile base, mostly to 15 mm long and 3 mm wide; glandular-scabrid with woolly hairs, especially on the underside. Flower-spike at the tip of a stalk with a single golden-yellow daisy-head. Flowering between July and September.
Fruit type:
Pale brown fluffy daisy-head.
Seed type:
Pale brown oblong seed to 2.5 mm long and 0.5 mm wide, covered in small tubercules and with long feather-liked pappus.
Embryo type:
Spatulate.
Seed collecting:
Collect whole heads that are brown and fluffy or collect just the seeds by plucking it off with your fingers. Mature seeds are easily removed.
Seed cleaning:
Place the heads in a tray for a week to dry. Then pluck the seeds from the head with your finders. Viable seeds will be fat and brown. 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 average, at 50%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA207000 (15.53 g)8-Dec-2005DJD30714-Sep-200650%-18°C
BGA21800 (2.58 g)30+29-Sep-2007DJD892
Lake Eyre
19-Sep-200895%-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.