Mentha diemenica

Lamiaceae

Slender Mint

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flower: Mentha diemenica flowers Wirrabara Southern Flinders

flower: Mentha diemenica flowers foreground Honans 1

flower: Mentha diemenica flowers Thomas Gully

flower: Mentha diemenica flower Wirrabara Southern Flinders 29 Oct 2008

flower: Mentha diemenica flowers Honans NFR

seed: Mentha diemenica seed Thomas Gully

seed: Mentha diemenica Kuitpo Forest seed

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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Botanical art

Kath Alcock paintings: 15

Prior names

Mentha serpyllifolia

Mentha gracilis

Common names

Slender Mint

Distribution and status

Rare in South Australia. The SA Seed Bank collected and banked >1000 seeds from Thomas Gully near Kangarilla in 2017 supported by Natural Resources Adelaide & Mount Lofty Ranges.
Herbarium regions: Eyre Peninsula, Yorke Peninsula, Southern Lofty, South Eastern, Green Adelaide
AVH map: SA distribution map (external link)

Seed collection and propagation

Collect seeds between December and March.

Seeds stored:

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Location	No. of seeds (weight grams)	Number of plants	Date collected	Collection number Collection location	Date stored	% Viability	Storage temperature
BGA	76 (0.8 g)	30+	23-Feb-2005	DJD102 Southern Lofty	10-Aug-2006	N/C	-18°C
BGA	1,000 (0.1824 g)	100+	9-Feb-2017	DJD3620 Southern Lofty	1-Nov-2017	60%	-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:

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Date	Result	T0	T50	Pre-treatment \| Germination medium \| Incubator: Photoperiod / Thermoperiod
Aug-17	77%	7	7	30% hydrogen peroxide for 10 min, water rinse, 500 mg/L gibberellic acid for 24 h; 1% agar; Incubated under spring/autumn conditions
Aug-17	57%	21	28	leached in water 24 h; 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)

Bridgewater (NCP01)	Naracoorte Coastal Plain	Rare (IUCN: )
Glenelg Plain (NCP02)		Rare (IUCN: )
Lucindale (NCP03)		Rare (IUCN: )
Fleurieu (KAN02)	Kanmantoo	Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) [needs rich soil; some taxonomic issues between diemenica & satureioides]
Mount Lofty Ranges (FLB01)	Flinders Lofty Block	Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) [very small pops; needs rich soil; some taxonomic issues between diemenica & satureioides]