Three species of Amanita Pers. are documented from Western Australia. Amanita drummondii E.M.Davison is described from the south-west region; it appears to be widespread but infrequent. Amanita quenda E.M.Davison is described from the Perth Metropolitan area. Amanita walpolei O.K.Mill. is redescribed to include additional collections, drawing attention to the presence of clamp connections in all tissues. A BLASTn search has shown that there are no exact matches of the nuclear ribosomal internal transcribed spacer (ITS) region of each species with those in GenBank.
Updates to Western Australia’s vascular plant census for 2014
Synostemon hamersleyensis I.Telford & Naaykens (Phyllanthaceae), morphologically similar to but distinct from Sauropus aphyllus J.T.Hunter & J.J.Bruhl, is named as new and its habitat, distribution and conservation status are discussed. The new species is endemic to ironstone formations of the Hamersley Range in the Pilbara, central Western Australia.
Hibiscus sp. Ninghan Station (A.A. Mitchell 1161) is synonymous with Radyera farragei
Eleven new species (Caladenia ambusta A.P.Br. & G.Brockman, C. bigeminata A.P.Br. & G.Brockman, C. leucochila A.P.Br., R.Phillips & G.Brockman, C. erythronema A.P.Br. & G.Brockman, C. fluvialis A.P.Br. & G.Brockman, C. hopperiana A.P.Br. & G.Brockman, C. perangusta A.P.Br. & G.Brockman, C. pluvialis A.P.Br. & G.Brockman, C. straminichila A.P.Br. & G.Brockman, C. swartsiorum A.P.Br. & G.Brockman and C. validinervia Hopper & A.P.Br. ex A.P.Br. & G.Brockman) and six new subspecies (C. attingens Hopper & A.P.Br. subsp. effusa A.P.Br. & G.Brockman, C. denticulata Lindl. subsp. albicans A.P.Br. & G.Brockman, C. denticulata subsp. rubella A.P.Br. & G.Brockman, C. longicauda Lindl. subsp. extrema A.P.Br. & G.Brockman, C. longicauda subsp. insularis Hopper & A.P.Br. ex A.P.Br. & G.Brockman and C. longicauda subsp. minima A.P.Br. & G.Brockman) are described and illustrated and their relationships with related taxa discussed. We discuss the conservation status of rare taxa.
A new species of Angianthus (Asteraceae: Asteroideae: Gnaphalieae) from the south-west of Western Australia
LYONS, M.N. AND KEIGHERY, G.J., Nuytsia25: 125–129 (2015)
The new species Angianthus globuliformis M.Lyons & Keighery (Asteraceae: Gnaphalieae) is described from gypsum dunes of the Western Australian agricultural zone.
Reinstatement of Ericomyrtus (Myrtaceae: Chamelaucieae), with three new combinations
The south-western Australian genus Ericomyrtus Turcz. is reinstated as a small genus comprising the type species E. drummondii Turcz., and three species transferred into the genus as E. parvifolia (Turcz.) Rye, E. serpyllifolia (Turcz.) Rye and E. tenuior (Ewart) Rye. A lectotype is selected for the base name of the last of those species, Baeckea crispiflora var. tenuior Ewart. It appears that the genus has a tetraploid base number of x = 22. Maps, descriptions and a key are provided for the four named members of the genus.
Astartea pulchella (Myrtaceae: Chamelaucieae), a new combination for Baeckea pulchella, and the reduction of A. laricifolia to synonymy
Dipteracanthus chichesterensis (Acanthaceae: Ruellieae), a new geographically and edaphically restricted species from the Pilbara bioregion of Western Australia
TRUDGEN, MALCOLM E. AND DE KOCK, P.-L., Nuytsia25: 161–170 (2015)
Dipteracanthus chichesterensis Trudgen & de Kock is described as a new species of Acanthaceae (tribe Ruellieae Dumort.) restricted to the Chichester Plateau in the Pilbara bioregion of Western Australia. The new species is known from five localities and is considered poorly known and of conservation significance. It is most closely related to D. australasicus F.Muell., differing in stem and leaf indumentum, pollen ornamentation and seed characteristics. A distribution map, photographs and a key to Dipteracanthus Nees taxa currently recognised in Western Australia are provided.
A revision of species from the tribe Lasiopetaleae (Byttnerioideae: Malvaceae) with rostrate anthers
SHEPHERD, K.A. AND WILKINS, C.F., Nuytsia25: 171–189 (2015)
An informal group of species within the tribe Lasiopetaleae Gay, characterised by a lack of stipules and distinctive, rostrate anthers, are revised and included in Lasiopetalum Sm. Revised descriptions are provided for the reinstated L. laxiflorum (Benth.) F.Muell. and newly elevated subspecies of L. glutinosum (Lindl.) F.Muell. (L. glutinosum subsp. glutinosum and L. glutinosum subsp. latifolium (Benth.) K.A.Sheph. & C.F.Wilkins). Three new species of conservation concern are recognised (L. cenobium K.A.Sheph. & C.F.Wilkins, L. trichantherum K.A.Sheph. & C.F.Wilkins and L. venustum K.A.Sheph. & C.F.Wilkins). A distribution map, images and a key to the group are included.
A new Mitrasacme (Loganiaceae) from the Western Australian desert
GIBSON, N. AND VAN LEEUWEN, S., Nuytsia25: 191–194 (2015)
A full synonymy is presented for S. affine Sond. to include S. affine var. minus E.Pritz., a name previously treated as a synonym of S. caricifolium Lindl. Lectotypes are selected for four species described by Otto Sonder, namely S. lineatum Sond., S. pubigerum Sond., S. rupestre Sond. and S. uniflorum Sond. Stylidium rupestre f. abbreviatum Mildbr., S. rupestre f. congestum Mildbr., S. rupestre f. uniflorum Mildbr. and S. glaucum var. brownei DC. are formally placed into synonymy under S. rupestre, with lectotypes designated for S. rupestre f. abbreviatum and S. glaucum var. brownei. Revised descriptions are provided for S. rupestre and S. uniflorum, and S. uniflorum subsp. extensum Wege is newly described. Putative hybrids between both subspecies of S. uniflorum and S. leptophyllum DC. are recorded.