Boronia parviflora

Regional Species Conservation Assessments per IBRA subregion.

Least concern

Near threatened

Rare

Vulnerable

Endangered

Critically endangered

Extinct

Data deficient

Adelaide

Arkaroola

Ceduna

Coober Pedy

Hawker

Innamincka

Marla

Marree

Mount Gambier

Oodnadatta

Renmark

Wudinna

Keith

Yunta

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Boronia named after Francesco Borone (1769-1794), an Italian botanical enthusiast who accompanied many botanical expeditions and impressed Smith (person who described the genus) with his enthusiasm and ability. Parviflora from the Latin 'parvus' meaning small and 'floris' meaning flower, alluding to the small flowers of this species.

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)

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.

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. Seed viability can be low. This species has physiological dormancy and can be difficult to germinate.

Location	No. of seeds (weight grams)	Number of plants	Date collected	Collection number Collection location	Date stored	% Viability	Storage temperature
BGA	120 (0.05 g)	5	7-Apr-2006	R.Taplin Southern Lofty	9-Aug-2006	N/C	-18°C
BGA MSB	3,650 (3.14 g) 3,650 (3.14 g)	100+	15-Nov-2006	DJD676 South Eastern	1-Aug-2007	60%	+5°C, -18°C
BGA	120 (0.09 g)		3-Feb-2011	JQ140 Southern Lofty	1-Jan-2012	80%	-18°C
BGA	160		3-Jan-2008	DJD1039 Southern Lofty	1-Jan-2012	N/C	-18°C
BGA	2,470 (1.26 g)	100+	5-Nov-2014	DJD3072 Southern Lofty	2-May-2017	65%	-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.

Date	Result	T0	T50	Pre-treatment \| Germination medium \| Incubator: Photoperiod / Thermoperiod
May-15	48%	14	NA	leached in water 48 h, 500 mg/L gibberellic acid + 10% smoke water for 24 h; 1% agar; Incubated under spring/autumn conditions
May-15	6%	28	NA	1% 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)

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]