Seeds of South Australia
Boronia parviflora (Rutaceae)
Swamp Boronia
List of species for Boronia
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Seed collecting:
November to March
Herbarium regions:
Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Rare   (IUCN: RA d(i,ii))   [mostly in fire breaks in reserves]
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))   [mostly in fire breaks in reserves]
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   [on west end; relies on fresh water]
Fleurieu (KAN02) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [requires fire; in Fleurieu Swamps]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Critically Endangered   (IUCN: CR B2ab(i,ii,iii,iv,v); D)   (Definite Decline)   [requires fire; ~ 3 plants left in Boyle's Swamp, Mylor]
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 Boronia]
Name derivation:
Boronia named after Francesco Borone (1769-1794), an Italian botanical enthusiast who accompanied many botanical expeditions. Parviflora from the Latin 'parvus' meaning small and 'floris' meaning flower.
Found on the western end of Kangaroo Island, southern Mount Lofty Ranges and the lower South-east in South Australia growing in  in wet heath and swampy areas. Also found in Western Australia, New South Wales and Victoria.
Native. Rare in South Australia. Common in the other States.
Plant description:
Glabrous, suberect to decumbent subshrub to 40 cm high or wide with reddish or purplish stems. Leaves glabrous, elliptic to narrow-elliptic or linear-obovate to 20 mm long and 3 mm wide. Inflorescence terminal and in upper axils with mostly solitary, pink or red flowers. Flowering from November to February.
Fruit type:
Pale brown capsule to 3 mm long with two to four segments.
Seed type:
Shiny, black ovoid seed to 3 mm long and 2 mm wide,
Embryo type:
Linear fully developed.
Seed collecting:
Collect mature capsules, those that are turning a pale straw colour and contain hard seeds. It can be very time consuming, therefore allow pretty of time to collect sufficient among of seeds.
Seed cleaning:
Place the capsules in a tray and leave to dry for a weeks. Then rub the capsules gently by hand to dislodge the seeds. 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 two collections, the seed viability was average, ranging from 69% to 80%.
Seed germination:
This species has physiological dormancy and can be difficult to germinate.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA129 (0.05 g)57-Apr-2006R. Taplin
Southern Lofty
3650 (3.14 g)
3650 (3.14 g)
South Eastern
1-Aug-200760%+5°C, -18°C
BGA129 (0.09 g)3-Feb-2011JQ140
Southern Lofty
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
May 201548%14dNA Leach in RO water for 48 hrs, then soak in 500 mg/L gibberellic acid + 10% smoke water for 24 hrs
1% water agar
Incubated under spring/autumn conditions
May 20156%28dNA None
1% water 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)