Seeds of South Australia
Gratwickia monochaeta (Compositae)
One-bristle Everlasting
List of species for Gratwickia
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Seed collecting:
October to December
Herbarium regions:
Lake Eyre, Nullarbor, Gairdner-Torrens, Eastern, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
Myall Plains (GAW01)Gawler
 Least Concern
Gawler Volcanics (GAW02) 
 Least Concern
Gawler Lakes (GAW03) 
 Least Concern
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06)Great Victoria Desert
 Least Concern
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Data Deficient   [Most easterly occurance of spp. Highly data deficient.]
Murnpeowie (STP03)Stony Plains
 Rare   (IUCN: RA d(ii))   [edge of range; questionable records as Western spp]
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 Gratwickia]
Name derivation:
Gratwickia named after W.H Gratwick. Monochaeta from the Greek 'mono' meaning single and 'chaite' meaning bristle; referring to the single pappus bristle on the achenes.
Endemic to South Australia and found in the central part, growing on various sites but usually in sand.
Native. Rare in South Australia.
Plant description:
Sparingly to much-branched annual herbs to 18 cm tall and to 10 cm diameter, with several ascending stems, stems and branches sometimes purple-tinged, with a moderately dense woolly hairs and sessile glandular hairs, becoming less dense with age. Leaves narrowly oblanceolate, almost linear, with recurved margins, to 30 mm long and 2 mm broad, covered in woolly hairs, more dense on the underside. Flower-heads several in tight clusters terminating the stems and branches with bright golden-yellow flowers. Flowering between August and October.
Fruit type:
Brown daisy head.
Seed type:
Light brown ovoid seed to 0.8 mm long and 0.4 mm wide, with a single pappus bristle.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect whole heads that are drying off and turning golden brown 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 high, at 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
21000 (1.01 g)
21000 (1.01 g)
Eyre Peninsula
Jun-2010100%+5°C, -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.