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. Microthrix from the Greek 'mikros' meaning small and 'thrix' meaning hair, referring to the minute hairs on the leaves.
Distribution and status
Found in the southern Mount Lofty Ranges in South Australia, growing in moist habitats near creeks and low-lying areas. Also found in New South Wales and Victoria. Native. Rare in South Australia. Rare in Victoria. Common in New South Wales.
Herbarium region: Southern Lofty
NRM region: Adelaide and Mount Lofty Ranges
AVH map: SA distribution map (external link)
Annual herb to 30 cm high with a taproot or fibrous root and stems erect to trailing, glabrous or occasionally sparsely hairy. Basal leaves few to many, persisting or not, to 8 cm long, simple or pinnate, the terminal pinna relatively large, broadly ovate with a strongly cordate base. Stem leaves mostly to 5 cm long, pinnate with 1-3 pairs of lateral pinnae, terminal pinnae usually 5-9-lobed, often acutely, lateral pinnae usually trilobed, margins of pinnae almost always with several minute hairs. Flower spike few to many white flowers. Flowering possibly all year. Fruits are long pale brown pods to 3 cm in length, splitting into two. Seeds are small orange-brown flat reniform seeds to 1.5 mm long and 0.7 mm wide. Seed embryo type is bent.
Seed collection and propagation
Collect seeds between October and December. Collect maturing pods those turning pale brown with orange 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 high for this species. This species has physiological dormancy that need to be overcome for the seed to germinate.
|Location||No. of seeds|
6,000 (1.46 g)
|BGA||3,800 (0.82 g)||27-Apr-2007||RJB70361|
|4,800 (0.78 g)|
4,800 (0.78 g)