Plants of
South Australia
Boronia parviflora
Rutaceae
Swamp Boronia
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Regional Species Conservation Assessments per IBRA subregion.
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Botanical art

Kath Alcock paintings: 5.

Etymology

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 and status

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.
Herbarium regions: Southern Lofty, Kangaroo Island, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
AVH map: SA distribution map (external link)

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. Fruits are pale brown capsule to 3 mm long with two to four segments. Seeds are shiny, black ovoid seed to 3 mm long and 2 mm wide, Seed embryo type is linear fully developed.

Seed collection and propagation

Collect seeds between November and March. 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. 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. From two collections, the seed viability was average, ranging from 69% to 80%. This species has physiological dormancy and can be difficult to germinate.

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA120 (0.05 g)57-Apr-2006R.Taplin
Southern Lofty
9-Aug-2006N/C-18°C
BGA 
MSB
3,650 (3.14 g)
3,650 (3.14 g)
100+15-Nov-2006DJD676
South Eastern
1-Aug-200760%+5°C, -18°C
BGA120 (0.09 g)3-Feb-2011JQ140
Southern Lofty
1-Jan-201280%-18°C
BGA1603-Jan-2008DJD1039
Southern Lofty
1-Jan-2012N/C-18°C
BGA2,470 (1.26 g)100+5-Nov-2014DJD3072
Southern Lofty
2-May-201765%-18°C, -80°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:
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