Cardamine lineariloba

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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Cardamine from the Greek 'kardamon', a name given by Dioscorides for a species of cress, an Indian spice and derived from the Greek 'cardia' meaning heart and 'damaein' meaning to blind, alluding to the reputed heart-strengthening effects of the plant. Lineariloba from the Latin 'linearis' meaning linear, straight and 'lobos' meaning lobe, referring to the species linear leaf lobes.

Found in the South-east in South Australia growing in drainage lines, saline flats and on streambanks. Old record from Myponga but now assumed extinct in the Mount Lofty Ranges. Also found in Victoria. Native. Rare in South Australia. Rare in Victoria.
Herbarium regions: Southern Lofty, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, South East
AVH map: SA distribution map (external link)

Glabrous annual herb to 25 cm high, tap-rooted or fibrous rooted with slender, erect to ascending stems. Basal leaves to 7 cm long, forming a rosette; simple, entire and narrowly spatulate to almost linear, or pinnately divided with 1-4 forward projecting, linear lateral lobes and a much longer terminal lobe. Stem leaves similar. Flower spike with few white flowers. Flowering in late August to October. Fruits are long pale brown pods to 2 cm in length, splitting into two. Seeds are small yellow flat reniform seeds to 1 mm long and 0.7 mm wide. Seed embryo type is bent.

Collect seeds between September and December. Collect maturing pods those turning pale brown with yellow seeds inside. Be gentle with the pods as they split open easily. Place the pods in a tray and cover with paper to prevent seeds from popping out and leave to dry for a week. Then rub the dried pods 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 is usually high. This species has physiological dormancy that need to be overcome for the seed to germinate.

Location	No. of seeds (weight grams)	Number of plants	Date collected	Collection number Collection location	Date stored	% Viability	Storage temperature
BGA MSB	1,700 (0.2 g) 1,700 (0.2 g)	50+	27-Sep-2013	DJD2758 South Eastern	24-Mar-2015	100%	-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.

Date	Result	T0	T50	Pre-treatment \| Germination medium \| Incubator: Photoperiod / Thermoperiod
Sep-14	100%	9	9	leached in water 4 d, 500 mg/L gibberellic acid 48 h; 1% agar; Incubated under winter conditions
Sep-14	70%	16	16	leached in water 4 d, 100 mg/L potassium nitrate 48 h; 1% agar; Incubated under winter conditions
Sep-14	40%	9	NA	1% agar; Incubated under winter 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)

Glenelg Plain (NCP02)	Naracoorte Coastal Plain	Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) [(no records) R Bates - named in 2005, loss of habitat & changed hydrology - threats]
Lucindale (NCP03)		Endangered (IUCN: EN B2ab(i,ii,iii,iv)) (Probable Decline) [(no records) R Bates - named in 2005, less than 100 plants known; changed hydrology - threat]