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flowers

Natural populations

Daviesia mimosoides is a common shrub in south easternAustralia, with scattered populations extending north to Queensland and inland, west of the Great Dividing Range. Typically it occurs in open eucalypt forest with a heath-dominated shrubby understorey, on skeletal soils. Two subspecies are recognised [69, 70]:

An attractive form of D. mimosoides from the New England area of New South Wales that has arching branches and denser, brighter yellow flower clusters than the more common form, is documented on the Australian National Botanic Gardens website [48].

Flowering and seeds

Flowering times are mainly during September to October, with an observed trend of commencing as early as August on the coast and finishing as late as December at high altitudes in the south [70]. Insect pollinated [68]. The fruiting period can also vary with altitude and latitude, with the main times during October to January [70]. The species has a high out-crossing rate during pollination, with little evidence of selfing [68]. A pre-treatment of chipping or scarifying the seed coat is required as hard-seeded; high germination percentage once the seed coat is broken [90].  Another method for breaking the seed coat is to place seeds in a cloth bag and immerse in near boiling water for 30 seconds before quickly cooling in cold water [93].

Cultivation and uses

Davesia mimosoides subsp. mimosoides may be useful as browse for stock during drought [70]. In general, Daviesias are a source of nectar and pollen for birds and insects and can act as nesting sites for small birds [93], particularly when many are growing together in a moderately dense shrubby layer.

Key descriptors:
Subsp. arcris:
Climate parameters
Mean annual rainfall: 650-1550 mm
Rainfall distribution pattern: uniform or winter
Mean annual temperature: 3-14 °C
Mean max. temperature of the hottest month: 19-24 °C
Mean min. temperature of the coldest month: -1-2 °C
Frosts (approx. no. per year): greater than 20
Frost intensity: light to moderate (0 to -5°C)
Altitude: 800-1450 metres
Tolerance of extremes in climate
Fire: killed by damaging fire does not regenerate foliage
Frost: tolerates frosts in the 0° to -5°C range
Soil factors
Texture: loam, sandy loam, sandy clay loam
Soil pH reaction: acidic (less than 6.5)
Soil depth: skeletal to shallow (less than 30 cm)
Drainage:  well-drained
Salinity: non-saline
Potentially undesirable attributes
Fire sensitivity: killed by severe fires (seeder)

Subsp. mimosoides:
Climate parameters
Mean annual rainfall: 450-3000 mm
Rainfall distribution pattern: summer, uniform or winter
Mean annual temperature: 5-17 °C
Mean max. temperature of the hottest month: 18-31 °C
Mean min. temperature of the coldest month: -4-8 °C
Frosts (approx. no. per year): up to 20 or greater than 20
Frost intensity: light to moderate (0 to -5°C)
Altitude: 10-1400 metres
Tolerance of extremes in climate
Fire: killed by damaging fire does not regenerate foliage
Frost: tolerates frosts in the 0° to -5°C range
Soil factors
Texture: light to medium clay (35-50% clay) or loam, sandy loam, sandy clay loam
Soil pH reaction: acidic (less than 6.5)
Soil depth: skeletal to shallow (less than 30 cm)
Drainage: well-drained
Salinity: non-saline
Biological traits under cultivation
Shade tolerance: tolerates partial shade
Potentially undesirable attributes
Fire sensitivity: killed by severe fires (seeder)

References

[48] Australian National Botanic Gardens and National Herbarium (2008) Growing Australian Plants. (Online Resource) http://www.cpbr.gov.au/gnp/index.html (Accessed: February 2008)

[68] Young A, Brown AHD (1996) Comparative population genetic structure of the rare woodland shrub Daviesia suaveolens and its common congener D. mimosoides. Conservation Biology vol 10, No 4, pp 1220-1228.

[69] Crisp MD (1995) Contributions Towards a Revision of Daviesia (Fabaceae: Mirbelieae). III. A Synopsis of the Genus. Australian Systematic Botany, 8, 1155-1249.

[70] Crisp MD (1991) Contributions Towards a Revision of Daviesia Smith (Fabaceae: Mirbelieae). II. The D. latifolia Group. Australian Systematic Botany, 4, 229-98.

[90] Flynn S, Turner RM, Dickie JB (2004) Seed Information Database (Release 7.0, October 2006). (Online database) http://www.kew.org/data/sid/ (Accessed: July 2007).

[93] Bonney N (2003) What Seed Is That? A guide to the identification, collection, germination and establishment of native plant species for central southern Australian landscapes. Neville Bonney, Tantanoola.

Internet links

Australian National Botanic Gardens – Growing Australian Plants: http://www.cpbr.gov.au/gnp/gnp14/daviesia-mimosoides.html

PlantNet NSW Flora Online – species description & distribution: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Daviesia~mimosoides

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