NSW National Parks and Wildlife Service, September 2001
ISBN 0 731 36281 0
7 Previous management actions
A species recovery team has been established to supervise and monitor all recovery actions for these taxa. The recovery team may be revised to ensure representation reflects the requirements to conserve G. obtusiflora.
Recovery team members include representatives from the NPWS, State Forests of NSW, Australian National Herbarium Centre for Plant Biodiversity Research, Rylstone Shire Council and the community.
Environment Australia has funded recovery actions for Grevillea obtusiflora subsp. obtusiflora during the 1997/1998 funding cycle:
- Literature and herbarium searches
A literature review has been conducted. The information in the literature about G. obtusiflora subsp. obtusiflora relates primarily to the taxonomic status of the taxon, with little known of the taxon biology or ecology. Journal articles of clonal species and fire ecology have also been collated.
A search of the NSW herbarium revealed only six collections. All of these were collected in Clandulla State Forest. The type collection is lodged at the British Museum, with an isotype at Kew. Five of the specimens at the NSW herbarium appear to have been collected in the same area (Clandulla State Forest, Site O1), with another specimen collected several kilometres away (Site 02).
- Field searches and data collection.
A number of field trips have been conducted to examine the habitat of the taxa, search for further sites and to determine numbers of plants and to gain knowledge of the plant's ecology. These field searches have defined the parameters of existing sites and searched other areas of suitable habitat. No other sites have been found to date. Details of the sites are shown in Appendix 1
The flowering period of both subspecies was closely monitored, and flowers dissected in an attempt to define a physical reason for the inability of G. obtusiflora subsp. obtusiflora to form seedpods and seed. Photos were taken of habitats, plants, flowers and macro-photographs taken of flowers, both dissected and whole and of the seed and seedpods of G. obtusiflora subsp. fecunda. Pollinator species for G. obtusiflora subsp. fecunda were noted. Flower heads of both G. obtusiflora subsp. obtusiflora and G. obtusiflora subsp. fecunda were bagged in an attempt to gather seed if produced. A total of 12 seeds were collected from G. obtusiflora subsp. fecunda.
Voucher specimens from each site were collected and submitted to the Herbarium of NSW, and threatening processes in operation at each site were identified.
- Preparation of a Conservation Research Statement and Species Recovery Plan.
A recovery team has been established comprising representatives from State Forests of NSW, the NPWS, Australian National Botanic Gardens, Rylstone Shire Council and Environment Australia. This recovery plan is the product of this funding component.
In addition to the actions contributed to by Environment Australia, a program of ex situ cultivation has been undertaken.
Cultivation of G. obtusiflora subsp. obtusiflora at Mt. Annan Botanic Gardens and Australian National Botanic Gardens has been successful. Voucher specimens held at the National Herbarium of NSW have been documented and additional specimens have been collected for inclusion in this collection. The Society for Growing Australian Plants also has a Grevillea speciality group who have had success at propagation of this plant. These collections have been random and opportunistic. The degree to which these collections are representative of the genetic material in situ is unknown.
Cultivation of Grevillea obtusiflora subsp. fecunda clones at both Mt. Tomah and Mt. Annan botanic gardens has been successful. Voucher specimens held at the National Herbarium of NSW have been documented and additional specimens have been collected for inclusion in this collection.