Seeds of South Australia
Acrotriche halmaturina (Epacridaceae)
Kangaroo Island Ground-berry
List of species for Acrotriche
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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 Acrotriche]
Name derivation:
Acrotriche from the Greek 'akron' meaning summit and 'thrix' meaning hair; alluding to the tuft of hairs at the tip of the corolla lobes. Halmaturina is derived from Halmaturus, a generic name once applied to kangaroos, and is from the Greek 'halme' meaning a 'leap or bound',  commonly used for species from Kangaroo Island.
Distribution:
Endemic to South Australia and found only on the western side of Kangaroo Island, on lateritic soil.
Status:
Native. Uncommon in South Australia.
Plant description:
Small shrub to 30cm high, with the stems below the ground surface. Young branches red-brown and older stems grey. Leaves ovate to ovate-lanceolate to 12mm long and 4mm wide; acute, with a pointed tip and an obtuse base; upper surface scabrous to hispid, lower surface glaucous with white scale-like hairs between the veins and sparsely hairy. Flowers in small clusters at the base of the plant, appearing between August and September.
Fruit type:
Fleshy dark-red, sparsely hairy, globular fruit to 4.5mm diameter.
Seed type:
Woody, pale-brown globular seed to 4mm long and 4mm wide, covered with hairs.
Embryo type:
Linear underdeveloped.
Seed collecting:
Lift branches carefully to locate the fruits at the base of the plant. Fruit may sometime by buried just below the ground. Collect berries that are ripe, dark-red flesh with a hard seed inside.
Seed cleaning:
Place the berries 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 two collections, the seed viability was average to high, ranging from 65% to 90%.
Seed germination:
This species is generally difficult to germinate, it has morpho-physiological dormancy and complex germination requirements.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
KI (2006)
Kangaroo Island
1-Jan-2012-18°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.