Seeds of South Australia
Leptorhynchos tetrachaetus (Compositae)
Beauty Buttons
List of species for Leptorhynchos
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Seed collecting:
October to January
Herbarium regions:
Gairdner-Torrens, Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Lucindale (NCP03)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)   [could be L scaber]
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [weeds a threat; most pops are less than viable size]
Broughton (FLB02)Flinders Lofty Block
 Least Concern
Olary Spur (FLB03) 
 Least Concern
Southern Flinders (FLB04) 
 Least Concern
Northern Flinders (FLB05) 
 Data Deficient   [check ID, doughtful]
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [northern edge of range; weeds & climate change - threats]
Southern Yorke (EYB01)Eyre Yorke Block
 Rare   (IUCN: RA a)   (Probable Decline)
St Vincent (EYB02) 
 Least Concern
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Wimmera (MDD05) 
 Regionally Extinct   [presumed extinct]
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
IBRA regions
DISPLAY ALL
Lucindale (NCP03)Naracoorte Coastal PlainVulnerable
  (IUCN: VU D2)   [could be L scaber]
Fleurieu (KAN02)KanmantooRare
  (IUCN: RA d(ii))   (Probable Decline)   [weeds a threat; most pops are less than viable size]
5 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
, Data Deficient
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
2 of 6 subregionsMurray Darling DepressionRare
, Regionally Extinct
2 of 8 subregionsGawlerRare
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 Leptorhynchos]
Name derivation:
Leptorhynchos from the Greek 'leptos' meaning slender and 'rhynchos' meaning a snout; alluding to the beaked achenes of some species. Tetrachaetus from the Greek 'tetra' meaning four and 'chaite' meaning bristle; referring to the four bristles of bisexual florets.
Distribution:
Found on Eyre and Yorke Peninsulas, Flinders Ranges, Moutn Lofty Ranges and the South-east in South Australia, growing in various situations but in moister regions usually on dry, well drained sites. Also found in Western Australia, New South Wales and Victoria.
Status:
Native. Common in South Australia. Very rare in Western Australia. Common in the other states.
Plant description:
Annual herb to 15 cm high, usually much-branched, ascending to erect with wiry, glabrous to sparsely hair stems. Leaves linear, narrow-oblanceolate or -lanceolate, to 20 mm long and 2 mm wide, acute, upper surface glabrous or with scattered hairs, undersurface usually cottony, margins usually recurved. Flower-head obconical to 10 mm diameter, outer involucral bracts lanceolate, acute, yellow-translucent, sometimes golden, margins densely ciliate; innermost bracts linear, mostly herbaceous and glandular, with slightly dilated, transparent, ciliate tip; florets yellow. Flowering between September and December.
Fruit type:
White fluffy daisy-head.
Seed type:
Brownellipsoid seed to 2 mm long and 0.5 mm wide, covered in short barbs and with long feathered-like papus at one end, bisexual florets with 4 bristles and female florets with 2 or 3 bristles.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect heads that are fluffy. Either pick off the whole heads or use your finger and pull off the seeds from the head. Mature seeds will come off easily.
Seed cleaning:
Place the heads in a tray for a week to dry. No cleaning is required if only pure seeds are collected. If heads are collected, then rub the heads gently with your hands to dislodge the seeds. Viable seeds will be fat and hard. Use a sieve to separate the unwanted material. 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 three collections, the seed viability were high, ranging from 85% to 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
6500 (0.94 g)
6500 (0.94 g)
17-Oct-2006DJD593
Yorke Peninsula
1-Aug-200785%-18°C
BGA4800 (0.31 g)20022-Nov-2009KHB313
Flinders Ranges
Jun-2010100%-18°C
BGA7600 (0.3 g)200+11-Nov-2009TST875
Yorke Peninsula
Jun-2010100%-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.