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The journal of the Western Australian Herbarium

Nuytsia is an open access, peer-reviewed journal that publishes original papers on the systematics, taxonomy and nomenclature of Australian (particularly Western Australian) plants, algae and fungi, especially descriptions of taxa, revisions, identification guides, nomenclatural and taxonomic issues, systematic analyses and classifications, censuses, and information on invasive species.

Nuytsia was founded in 1970 and is named after the iconic Western Australian Christmas Tree Nuytsia floribunda, an arborescent root hemiparasite endemic to south-west Western Australia. One-fifth of all published native plant names for Western Australia have been formally established in the journal, including over one-quarter of the conservation-listed taxa in the State. Refer to the cumulative index to scientific names published in Nuytsia for details.

Nuytsia papers are published electronically, singly or in small batches. For authors, this will provide a short turn-around time between submission and publication of papers. For readers, it will mean being up-to-date with the very latest taxonomic research in Western Australia. Subscribe to our Publication Alert via news feed to be informed of new papers as they are published.

Readers will be able to purchase a hard copy of each volume at the end of the year (see Subscription / Exchange for more information). A limited number of hard copies of each volume will also be distributed to key botanical libraries around the world.

New to Nuytsia

Published on Tuesday, 21 March 2023.

Updates to Western Australia’s vascular plant census for 2022

PERCY-BOWER, J.M. AND PARKER, C.M., Nuytsia 34: 1–20 (2023)

Update to the taxonomy of Hypocalymma sect. Hypocalymma (Myrtaceae: Chamelaucieae), including hybrids and new species

KEIGHERY, G.J., RYE, B.L. AND TAUSS, C., Nuytsia 34: 21–60 (2023)

In updating the taxonomy of Hypocalymma (Endl.) Endl. sect. Hypocalymma (Myrtaceae: Chamelaucieae), the section is described, a key is provided to the species and hybrids, full descriptions given for 11 species (three of them new, one reinstated) and three hybrids (one newly named). Taxa needing further study are noted. Five species and two of the hybrids described here have conservation priority. Two new species are described from the H. xanthopetalum F.Muell. complex as H. lateriticola Keighery & Rye and H. quadrangulare Rye & Keighery. The circumscription of H. angustifolium (Endl.) Schauer is reduced with the reinstatement of H. suave Lindl. and the description of the new species H. balbakiae Tauss & Rye. A northern variant of H. balbakiae (previously known as H. angustifolium subsp. Hutt River) is considered to be insufficiently distinct to recognise formally as a subspecies. Evidence is presented that one previously named and two phrase-named taxa are hybrids. Two of the hybrids are known from more than one location and have been recorded in hybrid swarms: one between H. angustifolium and H. tetrapterum Turcz. is named as H. × proliferum Keighery & Rye, while the other, H. × linifolium Turcz., has the parent species H. angustifolium and H. lateriticola. The third hybrid is H. tenuatum × H. xanthopetalum. The description of H. jessicae Strid & Keighery is broadened to include a new variant that has mostly higher ovule and stamen numbers. Amendments are made to the stamen and ovule numbers recorded for H. sylvestre Strid & Keighery; this species has up to 200 stamens, which is the highest stamen number known for the tribe Chamelaucieae DC. A new fruit type that is indehiscent and somewhat winged, is recorded for the genus; it occurs only in H. serrulatum Strid & Keighery, which also has an unusual breeding system.

Pterostylis segregata (Orchidaceae), a rare new species from south-west Western Australia

BROCKMAN, G. AND FRENCH, C.J., Nuytsia 34: 61–64 (2023)

Four new species of Amanita sect. Roanokenses (Basidiomycota) from Western Australia

DAVISON, E.M., GIUSTINIANO, D., BARRETT, M.D. AND SYME, K., Nuytsia 34: 65–92 (2023)

Four species of _Amanita _Pers. are documented from Western Australia. Amanita brunneola E.M.Davison & Giustiniano is described from the Perth region. It is distinguished by its pale brown pileus, white universal veil, globose basal bulb, amyloid, cylindric spores and presence of clamp connections. Amanita cretaceaverruca E.M.Davison & Giustiniano is described from the Perth region and the southern jarrah forest. It is distinguished by its brown pileus, with a thick white warty universal veil, globose or ovoid basal bulb, amyloid, elongate spores and absence of clamp connections. Amanita mallee E.M.Davison, Giustiniano & M.D.Barrett is described from the Shire of Coolgardie. It is distinguished by its white pileus and universal veil, tapered basal bulb, amyloid, cylindric spores and abundant clamp connections. Amanita validiuscula E.M.Davison, Giustiniano & K.Syme is described from the wheatbelt and Yalgoo area. It is distinguished by its white pileus and universal veil, ivory lamellae, fusiform or tapered basal bulb, amyloid, ellipsoid spores and abundant clamp connections. Molecular analysis shows all these species are members of sect. Roanokenses. Amanita brunneola, A. cretaceaverruca and A. mallee form a clade with other species from Australia and New Zealand, which may indicate Gondwanan origin.

Lectotypification of Astartea arbuscula and A. fascicularis (Myrtaceae)

WEGE, J.A. AND RYE, B.L., Nuytsia 34: 93–94 (2023)