Seeds of South Australia
Callitris canescens (Cupressaceae)
Limestone Cypress Pine
List of species for Callitris
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Seed collecting:
January to December
Herbarium regions:
Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Near Threatened   [edge of range; likes heavy limestone areas]
Kangaroo Island (KAN01)Kanmantoo
 Near Threatened
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern   [Likes red loam, limestone]
Lowan Mallee (MDD04) 
 Rare   (IUCN: RA d(i,ii))   [Likes red loam, limestone]
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 Callitris]
Name derivation:
Callitris from the Greek 'kalos' meaning beautiful and 'treis' meaning three; referring to the arrangement of the leaves in whorls of three. canescens from Latin meaning becoming grey; possibly referring to the colour of the cones.
Distribution:
Found on the Eyre and Yorke Peninsulas, Kangaroo Island, southern Mount Lofty Ranges and the Riverland in South Australia, growing in mallee open scrub on calcareous soils. Also found in Western Australia.
Status:
Native. Common in South Australia. Common in Western Australia.
Plant description:
Shrub or small tree to 5 m high, occasionally a prostrate shrub with separate male and female plants. Leaves light-green, fused together in rings of three, outer surface rounded.
Fruit type:
Grey round woody cones to 1.9 cm diameter with a smooth surface and scattered small tubercles, single or in groups of 2 or more.
Seed type:
Dark brown to black ovoid seeds to 6 mm long and 3 mm wide, with papery wing to 4 mm wide on either side.
Seed collecting:
Collect cones that are not open but large, hard and dark. These will contain maturing seeds.
Seed cleaning:
Place the cones in a tray and leave to dry for 3-5 weeks to allow the cones to open naturally. Then shake the cones in a bucket to dislodge the seeds. Use a sieve to separate the seeds from the cones. 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 low, at 30%.
Seed germination:
Viable seed should germinate readily, if stored in a fridge prior to sowing in winter.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA2261 (11.02 g)20+26-Mar-2014NRD060
Murray
24-Mar-201530%-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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
April 201496%19d19d None
70mm glass petri dishes on 1% w/v agar
Incubated under winter conditions
April 201464%23d29d None
70mm glass petri dishes on 1% w/v agar
Incubated under spring/autumn conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)