Volume 25
Issue Date: 9 October 2015
Permalink: https://doi.org/10.58828/niss00083
A revision of the Hibbertia hypericoides species group (Dilleniaceae)
THIELE, K.R. AND COCKERTON, G.T.B., Nuytsia 25: 285–300 (2015)
The Hibbertia hypericoides (DC.) Benth. species group comprises four species endemic in Western Australia. Hibbertia hypericoides is the most widespread species of Hibbertia Andrews in Western Australia, and exhibits significant and complex variation. The new subspecies H. hypericoides subsp. septentrionalis K.R.Thiele & Cockerton is described to accommodate a long-recognised form that occurs in the northern part of its range. The new species H. cockertoniana K.R.Thiele, previously included in H. hypericoides, is described. Descriptions are also provided for H. hypericoides subsp. hypericoides, H. silvestris Diels and H. furfuracea (R.Br. ex DC.) Benth., the other taxa in the group.
Typification and reinstatement of Isopogon spathulatus (Proteaceae: Leucadendreae)
RYE, B.L. AND HISLOP, M., Nuytsia 25: 301–306 (2015)
Hibbertia paranthera (Dilleniaceae), a remarkable new species from the Prince Regent River in Western Australia
THIELE, K.R., Nuytsia 25: 307–312 (2015)
A distinctive and remarkable new species in Hibbertia Andrew subgen. Pachynema (R.Br. ex DC.) J.W.Horn is described and illustrated. Hibbertia paranthera K.R.Thiele sp. nov. differs from all other species in subgen. Pachynema (and in the whole of Hibbertia) in having an androecium reduced to two large stamens, and a corolla of three petals. The new species is currently known from two populations c. 30 km apart in sandstone habitats in a remote area in Prince Regent National Park, between the Prince Regent River and Prince Frederick Harbour.
A taxonomic revision of the Stylidium brunonianum alliance (sect. Saxifragoidea: Stylidiaceae)
WEGE, J.A., Nuytsia 25: 313–342 (2015)
A morphological assessment of Stylidium brunonianum Benth. and its allies recognises eight taxa, all of which are endemic to the south-west of Western Australia. Following examination of type material and field work, a narrower circumscription of S. brunonianum is presented, S. tenue Sond. is reinstated and the following five taxa are newly described: S. araeophyllum Wege, S. neurophyllum Wege, S. purpureum Wege, S. spiciforme Wege and S. tenue subsp. majusculum Wege. A revised description is provided for S. lowrieanum Carlquist, a conservation-listed species from the Leeuwen-Naturaliste Ridge. Lectotypes are selected for S. brunonianum, S. tenue and S. brunonianum var. minor Benth., with the varietal name newly placed into synonymy under S. tenue. A lectotype is also designated for the name S. striatum Lindl. var. glaucum Benth. (based on collections of S. lowrieanum, S. neurophyllum, S. bellum Wege and S. rosulatum Wege) to fix its application as a synonym of S. rosulatum. A dichotomous key to the S. brunonianum alliance is provided along with photographs of key features and distribution maps.
