Hibbertia fumana - profile

Indicative distribution


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Key:
known
predicted
The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Hibbertia fumana
Conservation status in NSW: Critically Endangered
Commonwealth status: Not listed
Gazetted date: 16 Dec 2016
Profile last updated: 29 May 2018

Description

A low shrub or sub-shrub with many branches at the base and branches also well branched. Foliage is small (~3 mm), hairy and slender, decurrent or nearly so onto the branches and with revolute margins. The flowers are pedunculate, with single flowers terminal on the stems, the peduncle elongating in fruit. The calyx is hairy on the outside and glabrous within. Petals are broadly bilobed, yellow, 5-7 stamens are clustered to one side of the twinned, hairy ovaries. Flowers are of the order of 10-12 mm across.

Similar to H. hirsuta from which it is distinguished by having 5-7 stamens, the vestiture and having a stalked flower. It is also considered similar to the Victorian species H. humifusa (which has the stalked flowers, vestiture and leaves) from which it is distinguished by the much smaller leaves and lack of simple hairs along the branches, although there are tufts of hairs in the leaf axils.

Other species with which it may be confused include Hibbertia aspera (peduncle of H. fumana is shorter, especially in flower, the foliage is more persistently hairy, and there are fewer stamens), H. empetrifolia (H. fumana is much more prominently stellate-hairy) and H. riparia (H. fumana has much shorter leaves). Hibbertia superans is another possible species for confusion, though H. fumana has smaller leaves.

The formal description is available in the original publication as linked here.

Distribution

Although originally collected by R. Brown, Caley and Sieber from sites as diverse as 'near South Head' and 'western Sydney', the only known extant population is in the Moorebank area (which could be the 'in occidental Sydney' or 'near Sydney' of either author). Currently only known from a single population at Moorebank but potentially elsewhere in greater Sydney.

Habitat and ecology

  • Generally found in areas of woodland with a more open understorey, in a long intergrade between Castlereagh Scribbly Gum Woodland and Castlereagh Ironbark Forest at the Moorebank Site.
  • Has the potential to occur in similar intergrade alluvial habitats rich in sands and laterite in other parts of western Sydney.
  • Habitat of an 1802 Caley collection 'near South Head' are uncertain, with potential communities in that area including coastal shale sandstone communities and open forest or forest communities on lateritised shale lenses. No similar alluvial sand deposits are identified in that area.
  • Soil texture and character described as fine sandy clay loam, grey brown in colour.
  • Community composition is noted to include Eucalyptus sideroxylon, E. fibrosa, E. parramattensis and E. sclerophylla, with Melaleuca decora. Shrub layer with Hakea sericea, Callistemon linearis, Bursaria spinosa, Grevillea parviflora, Acacia brownii, Acacia bynoeana, Pultenaea retusa, P. villosa, a diverse groundcover of Goodenia, Dianella, Poa, Stylidium, Themeda and Gonocarpus.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Threats

Recovery strategies

Activities to assist this species

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
Sydney BasinCumberland Known None
Sydney BasinPittwater Predicted None