Seeds of South Australia
Centipeda pleiocephala (Compositae)
Tall Sneezeweed
List of species for Centipeda
Click on an image to enlarge it
Seed collecting:
January to March, November
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Murray
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(i,ii))   [spread by birds]
Torrens (GAW06)Gawler
 Near Threatened   [poorly collected & understood, ephemeral]
Oodnadatta (STP02)Stony Plains
 Near Threatened   [poorly collected & understood, ephemeral]
Murnpeowie (STP03) 
 Near Threatened   [poorly collected & understood, ephemeral]
Macumba (STP05) 
 Near Threatened   [poorly collected & understood, ephemeral]
Witjira (STP06) 
 Near Threatened   [poorly collected & understood, ephemeral]
Baltana (STP07) 
 Near Threatened   [poorly collected & understood, ephemeral]
Diamantina-Eyre (CHC04)Channel Country
 Near Threatened   [poorly collected & understood, ephemeral]
Lake Pure (CHC07) 
 Near Threatened   [poorly collected & understood, ephemeral]
Everard Block (CER03)Central Ranges
 Near Threatened   [poorly collected & understood, ephemeral]
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 Centipeda]
Name derivation:
Centipeda from Latin for centipede, from 'centi' meaning hundred and 'ped' meaning foot; referring to the creeping stems. Pleiocephala from the Greek 'pleio' meaning many and 'kephale' meaning head; referring to the plant's habit of producing offsets.
Distribution:
Found in the north and north-eastern parts of South Australia and along the Murray River, growing in moist sandy, silty or clay soils in floodplains and the edges of watercourses. Also found in all mainland states.
Status:
Native. Common in South Australia. Rare in Victoria. Common in the other states.
Plant description:
Erect slender annual, to 40 cm high with branches glabrous except for a few cottony hairs on young growth and occasionally in axils. Leaves more or less oblong to narrowly obovate, to 25 mm long and 7 mm wide, serrate, surfaces glabrous, resin-dotted. Flower heads yellow-green, hemispherical to biconvex when  fully open to 4.5 mm diameter with 2–4 per cluster in leaf axil. Flowering between September and November.
Fruit type:
Dense brown daisy head.
Seed type:
Pale brown ovoid seed to 2.3 mm long and 0.6 mm wide, with scattered hairs on the narrower part.
Embryo type:
Spatulate.
Seed collecting:
Collect heads that are drying off and turning brown.
Seed cleaning:
Place the heads in a tray for a week to dry. Then rub the heads gently with your hands or a rubber bung to dislodge the seeds. Use a sieve to separate the unwanted material. Be careful as the seeds are very small. 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 95%.
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
BGA 
MSB
38000 (3.47 g)
38000 (3.47 g)
13-Mar-2007RJB70980
Lake Eyre
1-Aug-200795%-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.