Seeds of South Australia
Maireana decalvans (Chenopodiaceae)
Black Cotton-bush
List of species for Maireana
Display more images
Click on an image to enlarge it
Seed collecting:
November to May
Herbarium regions:
Northern Lofty, Murray, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, South Australian Murray-Darling Basin
IBRA regions
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [highly restricted; threatened by coastal devleopment]
St Vincent (EYB02)Eyre Yorke Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Definite Decline)   [Likes wetter, higher rainfall areas; occurs in specific areas. Habitat threatened by development.]
South Olary Plain (MDD01)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [sandy soils; highly localised; not readily eaten; Bob C says probably okay, not common]
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(i,ii))   [sandy soils; highly localised; not readily eaten; Bob C says probably okay, not common]
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 Maireana]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
'Maireana' after the 19th certury belgium botanist Adolphe Lemaire and 'decalvans' meaning balding or becoming hairless.
Distribution:
Found in heavy seasonally waterlogged soil. Recorded in the Mount Lofty Ranges and in Danggali Conservation Park, Murray region.
Status:
Endangered in South Australia.  Also recorded  in Victoria, New South Wales and Queensland.
Plant description:
Bushy shrub to 50 cm high. Slender branches, woolly or glabrous, often woolly in the leaf axils.  Leaves slender, alternate 5-8 mm long, fleshy and glabrous.  Flowers solitary, glabrous. Flowering November to May.
Fruit type:
Fruiting perianth glabrous with a simple, horizontal thin wing with a single radial split.
Seed type:
Ellipsoid to circular brown, convex seed.
Embryo type:
Peripheral
Seed collecting:
Collect seeds when fruits are brown and papery. Check inside several fruits for the presence of well developed seed before making a collection. Strip or shake fruiting branches into a container.
Seed cleaning:
Remove twigs and other plant material.
Seed viability:
Varied, between 40 - 70 % from 4 collections
Seed germination:
Germinates readily with no treatment.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
15831+15988 (25.33+25.58 g)
32300 (51.8 g)
~3011-Feb-2005MKJ 83
Southern Lofty
28-Mar-200670%+5°C, -18°C
BGA1092 (1.53 g)~2011-Feb-2005MKJ 81
Southern Lofty
28-Mar-200645%-18°C
BGA 
MSB
2086 (4.59 g)
1790 (3.41 g)
~612-Feb-2005MKJ 84
Southern Lofty
28-Mar-200675%-18°C
BGA1300 (3.05 g)3-Feb-2011Joe Quarmby
Southern Lofty
1-Jan-201240%-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.