Prostanthera Chlorantha Green Mintbush
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PLANT Prostanthera chlorantha Green Mintbush AUS SA AMLR Endemism Life History record at Harrogate, and two records from the northern outskirts of Adelaide.3 - R T State Perennial Habitat Family LABIATAE Forms small populations of a few scattered plants, on sandy and loamy soils.5 Commonly associated with Banksia, Daviesia and Leptospermum shrubland.1 At Newland Head CP, grows above coastal cliff, low, spreading under other shrubs.4 At Warren CP, grows under Prostanthera behriana in a dry rocky site.4 Within the AMLR the preferred broad vegetation groups are Shrubland, Mallee and Coastal.3 Within the AMLR the species’ degree of habitat specialisation is classified as ‘Moderate-Low’.3 Biology and Ecology Flowers from August to January.1 Photo: © Darrell Kraehenbuehl Aboriginal Significance Post-1983 records indicate the majority of the AMLR Conservation Significance distribution occurs in southern Ngarrindjeri Nation. Also Endemic to SA. The AMLR distribution is part of a present in Kaurna Nation and northern Peramangk limited extant distribution in adjacent regions within Nation.3 SA. Relative to all AMLR extant species, the species' taxonomic uniqueness is classified as ‘High’.3 Threats Threats include weed invasion and competition, Description inadequate recruitment and grazing impacts (e.g. Wiry, irregularly branched shrub to 0.5 m (rarely to 1 livestock, rabbits and kangaroos). Some sub- m high). Branches sparsely glandular; tiny, egg- populations may be under threat from road shaped leaves at widely spaced intervals along short maintenance works. Scott CP population is not under side branches, with branched hairs.5 Foliage is any major threat.2 aromatic when crushed. Petals thin, a dusty pale green to mauve blue.1 Within the AMLR, less than a third of known distribution occurs within 2 km of confirmed or suspected Often mistaken for the more common green- Phytophthora infestations.3 flowered form of Prostanthera serpyllifolia ssp. microphylla (P. Lang pers. comm.). Additional current direct threats have been identified and rated for this species. Refer to the main plan Distribution and Population accompanying these profiles. In SA occurs in EP, MU, SL and KI regions.1 Post-1983 AMLR filtered records indicate a patchy distribution, with most records from around Newland Head and Currency Creek/Finniss areas. Sparse records from Hale CP, Para Wirra RP, Mount Crawford Forest, Mark Oliphant CP and Myponga CP.3 Pre-1983 AMLR filtered records indicate additional historical records in the Barossa region, around Para Wirra RP, Hale CP and Barossa Reservoir, a single Further information: Biodiversity Conservation Unit, Adelaide Region Phone: (61 8) 8336 0901 Fax: (61 8) 8336 0999 http://www.environment.sa.gov.au/ Department for Environment and Heritage FIS 90346 May 2008 Prepared as part of the Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia 2009 - 2014 Regional Distribution Map based on filtered post-1983 records.3 Note, this map does not necessarily represent the actual species’ distribution within the AMLR. References Note: In some cases original reference sources are not included in this list, however they can be obtained from the reference from which the information has been sourced (the reference cited in superscript). 1 Department for Environment and Heritage Electronic Flora of South Australia species Fact Sheet: Prostanthera chlorantha (F.Muell.)F.Muell. ex Benth. Available from http://www.flora.sa.gov.au/ (accessed September 2007). 2 Department for Environment and Heritage. (2007). Adelaide and Mount Lofty Ranges Regional Recovery Pilot Expert Flora Workshop, Unpublished Notes. Participants: Bickerton, D., Croft, T., Jury, T., Lang, P., Prescott, A., Quarmby, J. and Smith, K., Adelaide. 3 Department for Environment and Heritage (2007). Adelaide and Mount Lofty Ranges Regional Recovery Pilot Project Database. Unpublished data extracted and edited from BDBSA, SA Herbarium (July 2007) and other sources. 4 Department for Environment and Heritage (2007). State Herbarium of South Australia Database. Unpublished data, extracted October 2007. 5 Prescott, A. (1988). It's Blue with Five Petals. Ann Prescott, Adelaide, South Australia. Further information: Biodiversity Conservation Unit, Adelaide Region Phone: (61 8) 8336 0901 Fax: (61 8) 8336 0999 http://www.environment.sa.gov.au/ Department for Environment and Heritage FIS 90346 May 2008 Prepared as part of the Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia 2009 - 2014 .