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.
Distribution:
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.
Status:
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 elliptic to narrow-elliptic or linear-obovate to 20 mm long and 3 mm wide, glabrous. Inflorescence terminal and in upper axils with mostly solitary, pink or red flowers. Flowering between 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 were 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)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA129 (0.05 g)57-Apr-2006R. Taplin
Southern Lofty
9-Aug-2006banked-18°C
BGA 
MSB
3650 (3.14 g)
3650 (3.14 g)
100+15-Nov-2006DJD676
South Eastern
1-Aug-200760%+5°C, -18°C
DJD10391-Jan-2012-18°C
BGA129 (0.09 g)3-Feb-2011JQ140
Southern Lofty
1-Jan-201280%-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
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)