Seeds of South Australia
Chrysocephalum eremaeum (Compositae)
Dryland Button-bush
List of species for Chrysocephalum
Click on an image to enlarge it
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 shoots.
Distribution:
Found in the northern part of 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 terminal 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.