Seeds of South Australia
Brachyloma ericoides ssp. bicolor (Epacridaceae)
Kangaroo Island Brush Heath
List of species for Brachyloma
Display more images
Click on an image to enlarge it
Seed collecting:
October to December
Herbarium region:
Kangaroo Island
NRM region:
Kangaroo Island
IBRA region
Kangaroo Island (KAN01)Kanmantoo
 Least Concern   [endemic to KI]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Brachyloma]
Name derivation:
Brachyloma from the Greek 'brachys' meaning short and 'loma' meaning a fringe or edge; alluding to the hairs or scales in the throat of the corolla tube. Ericoides from Greek meaning heath-like; possibly referring to the resemblance to plants in the genus Erica.. Bicolor from the Latin 'bis' meaning twice and 'color' meaning colour; referring to the distinctive contrasting pale green corolla tube and orange lobes of the flower.
Distribution:
Endemic to South Australia and found only on Kangaroo Island, growing in mallee woodland on sandy soil or on limestone.
Status:
Native. Common in South Australia.
Plant description:
Woody, perennial shrubs to 90 cm high. Leaves linear-lanceolate, to 16 mm long and 2 mm wide, tapering into a fine, pungent tip, glabrous, with a short stalk. Flowers, solitary, axillary, bell-shaped with pale green sepals and corolla tube and bright orange corolla lobes. This subspecies is easily distinguishable from the mainland subspecies by the uniformly pink flowers in B. ericoides ssp. ericoides. Flowering between August and October.
Fruit type:
Pale green globular fruit with a thin flesh and a woody seed.
Seed type:
Brown woody semi-flattened globular seed to 3.5 mm long and 4 mm wide, with 5 major and 5 minor longitudinal ribs.
Embryo type:
Linear under-developed.
Seed collecting:
Collect the fruit that are maturing, starting to turn pale green or yellowish with a hard woody seed inside.
Seed cleaning:
Place the fruits in a bucket of water and rub the flesh off with your hands. Drain the water and wash again if required to remove all the flesh. Then spread the wet seeds on some paper towel and leave to dry. 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:
From one collection, the seed viability was high, at 100%.
Seed germination:
This species is generally difficult to germinate, it has morphophysiological dormancy and complex germination requirements.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
July 201610%49dNA Cracked endocarps; soak in 500 mg/L GA for 72 hrs
1% water agar
/ 15 degrees C constant
July 20165%70dNA Cracked fruits; soak in H2SO4 (conc) for 2 hrs; then soak in 500 mg/L GA for 24 hrs
1% water agar
/ 15 degrees C constant
July 20165%49dNA Cracked fruits; soak in H2SO4 (conc) for 4 hrs; then soak in 500 mg/L GA for 24 hrs
1% water agar
/ 15 degrees C constant
July 20160%NANA Soak in H2SO4 (conc) for 2 hrs; then soak in 500 mg/L GA for 24 hrs
1% water agar
/ 15 degrees C constant
July 20160%NANA Soak in H2SO4 (conc) for 4 hrs; then soak in 500 mg/L GA for 24 hrs
1% water agar
/ 15 degrees C constant
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)