Peter M. Olde and Gregory J. Keighery, 2022, New species and taxonomic changes in the Grevillea thelemanniana Group (Proteaceae: Grevilleoideae: Hakeinae) from south-west Western Australia, Telopea, Volume 25: 331–352, Publication date: 4 November 2022
Four species are added to the Grevillea thelemanniana Group, the constituency of which is discussed in light of recent phylogenetic analyses. Two new species are described. Grevillea cooljarloo Keighery and Olde was previously included by some in Grevillea preissii Meisn. subsp. preissii or as G. pinaster divided-leaf form, and is presently known informally as Grevillea thelemanniana subsp. Cooljarloo (B.J. Keighery 28B) by the Western Australian Herbarium. Grevillea gillingarra Olde and Keighery has previously been confused with G. thelemanniana Hügel ex Endl. Grevillea preissii subsp. glabrilimba Olde and Marriott is here recognised at specific rank, as G. glabrilimba (Olde and Marriott) Olde. Grevillea preissii is more narrowly circumscribed, in line with the original concept sensu Meisner (1845), without subspecies. A photo of the Blaschka glass model of Grevillea preissii is included with permission. The historical confusion between G. thelemanniana. and G. preissii is revisited. Grevillea variifolia subsp. bundera Keighery is recognised at species-level as G. bundera (Keighery) Olde and Keighery. A conservation assessment for all taxa is provided and a key to the revised Thelemanniana Group, as currently accepted, is supplied.
Peter Olde, 2022, Grevillea tesselata Olde (Proteaceae: Grevilleoideae: Hakeinae), a rare new species of uncertain affinity from the Avon Wheatbelt region of south-west Western Australia, Telopea, Volume 25: 309-318, 6 October 2022
Grevillea tesselata Olde is described here as a new species from south-west Western Australia, known only from a small population in a fragmented roadside landscape, and previously recognised under the phrase name Grevillea sp. Trayning (W. Johnston WJ 071). Following the Flora of Australia, the new species keys to the Grevillea Acacioides Group which comprises only three species, G. endlicheriana Meisn., G. acacioides C.A.Gardner ex McGill. and G. gordoniana C.A.Gardner. A binary assessment of 50 morphological characters presented here supports the view that G. acacioides and G. endlicheriana are sister species. A key to the new species is provided and its distribution updated. Grevillea tesselata has a Priority One Conservation Code according to the Western Australian Herbarium.
Peter Olde, 2022, Grevillea gilmourii Olde and G. milleriana Olde (Proteaceae: Grevilleoideae: Hakeinae), two species newly described from New South Wales, Telopea, Volume 25: 181-195, 16 June 2022
Grevillea gilmourii Olde and G. milleriana Olde, two species new to science, are described. They are putative members of the Aspleniifolia/Hookeriana Subgroup of the Grevillea Pteridifolia Group. Grevillea gilmourii is separated from G. macleayana (McGill) Olde & Marriott where it had previously been treated as the ‘Deua form’, a geographically disjunct, divided-leaf variant. The separate formal recognition of G. gilmourii here necessitates a revised delineation of G. macleayana to restrict it to populations with undivided leaves only, incorporating recent clarification to terminology in relation to leaf lobing. Grevillea milleriana is a recent discovery from the Maddens Plains area, south of Sydney. Known from a single plant, its recognition as a biological species rather than as a self-sown hybrid is discussed. All three species are linked morphologically and historically to the Victorian species G. barklyana F.Muell. ex Benth., which remains taxonomically unaltered from recent treatments. For the sake of convenience, all four species (G. barklyana, G. macleayana, G. gilmourii and G. milleriana) are grouped informally into an alliance, the Grevillea barklyana alliance, for which diagnostic characters are outlined and two identification keys are given. Both newly described species have divided leaves and are known from only small populations. Conservation recommendations are provided for both new species.
Peter M. Olde, 2022, Grevillea manglesii (Proteaceae: Grevilleoideae: Hakeinae) revisited, Telopea, Volume 25: 33–62
Publication date: 15 March 2022
The correct citation for Grevillea manglesii (Proteaceae) is G. manglesii Pépin (1838). A neotype is here selected from among historic collections, now at Paris (P). Should the minimal description provided by Pépin be successfully challenged as inadequate, the name would not change but the revised authority would be Grevillea manglesii (Graham) A.Baumann and N.Baumann (1843). The origins and complex taxonomic and horticultural history of G. manglesii and its synonyms Manglesia glabrata Lindl., Anadenia manglesii Graham, Grevillea manglesii Hort., Manglesia trilobata Hort. ex Ettingsh., and Manglesia cuneata Endl. are outlined and discussed, together with new insights discerned from James Mangles’ unpublished Letter Books. The important role of Captain James Mangles R.N. to the botany and horticulture of Grevillea manglesii is reviewed and historical errors are corrected. Manglesia glabrata Lindl. is lectotypified. G. ornithopoda Meisn. is reinstated at specific rank and G. dissectifolia (McGill.) Olde is published as a new combination. Both are phenetically diagnosable without intergrades and occur in discrete populations that sometimes overlap the distribution of related species.
Olde & Marriott, 2021, (Proteaceae: Grevilleoideae: Hakeinae) an uncommon, geographically isolated species in the Triloba Group from subcoastal areas of southern Western Australia, Telopea, Volume 24: 241–245, Publication date: 1 June 2021
The existence of Grevillea merceri Olde & Marriott, herein described, was brought to light following a single collection by the late Ken Newbey in 1963. His specimen was treated by McGillivray and Makinson (1993: 187) as ‘unassignable to species’ but with possible affinity to G. paniculata Meisn., a species very broadly conceptualised in their work. Revision and a more restricted delimitation of G. paniculata by Olde & Marriott (1994, 1995) clarified the many significant differences from this specimen and others subsequently found. The relationship of G. merceri to other members of the Triloba Group however remains uncertain and awaits phylogenetic analysis.
Peter M. Olde, Grevillea hortiorum Olde (Proteaceae: Grevilleoideae: Hakeinae), an uncommon species from winter-damp woodlands in the Avon Wheatbelt, south-west Western Australia, Telopea, Volume 24: 1–6, Publication date: 1 March 2021
Grevillea hortiorum Olde is here described as a new species. It is a member of the Triloba Group sensu Flora of Australia, based on shared morphological characters, and it may be related to Grevillea acrobotrya Meisn. Numerous morphological differences distinguish it as a species, but its relationships have not been tested with phylogenetic data. Subsequent to its initial discovery, when it was thought to be rare, both its distribution and knowledge of populations have been greatly expanded, almost exclusively due to the efforts of its eponymous collectors. It was initially thought to be uncommon and associated with open wandoo woodland, but later collections have been gathered in open heath as well. An interim key to Grevillea hortiorum is provided.
Peter Olde, 2020, Grevillea pieroniae Olde (Proteaceae: Grevilleoideae: Hakeinae), a rare new species in the Triloba Group from the Stirling Range, Western Australia, and a short history of the group, Telopea, Volume 23: 227–235, Publication date: 22 December 2020
Twenty-one Grevillea species currently comprise the Triloba Group sensu Flora of Australia, or Group 1 sensu The Grevillea Book. All species except the transcontinental species G. anethifolia R.Br. are distributed in south- west Western Australia. Grevillea pieroniae Olde, herein described, is currently treated as Grevillea sp. Stirling Range (D.J. McGillivray 3488 & A.S. George) by the Western Australian Herbarium. It has some affinity with Grevillea anethifolia through shared possession of similar truncate-conical to cylindrical pollen-presenters. Grevillea pieroniae is a rare species that is potentially threatened by Phytophthora cinnamomi, fire frequency, a drying climate, as well as grazing by feral and native herbivores, so requires careful assessment and ongoing monitoring. A short history of the Triloba Group is provided to give context to Grevillea pieroniae and as precursor to other related species soon to be recognised.
Peter M. Olde, 2021, Missing in the Shark Bay area, Grevillea speckiana Olde, a new species and the northernmost member of the Triloba Group (Proteaceae: Grevilleoideae: Hakeinae), Telopea, Volume 24: 377–382, Publication date: 24 November 2021
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G. speckiana Olde is described from a single collection gathered in 1953. Although the specimens bears flowers in early bud, fruits and foliage are sufficient to assign and describe the species. Unlike several other species in the Triloba Group awaiting description from single specimens that represent extinct species, there is some hope for its continued existence because of the botanically unexplored locality in which it was collected.
Peter M. Olde, 2021, Grevillea trichantha Olde, a third species with hairy flowers in the Triloba Group (Proteaceae: Grevilleoideae: Hakeinae) from the Marchagee Track, south-west Western Australia, Telopea, Volume 24: 303–309, Publication date: 9 July 2021
Grevillea trichantha Olde, a rare species in the Triloba Group is described. It appears to be most closely related to another rare species, G. metamorpha Makinson and is more common, though its localised distribution still requires a high conservation priority. Grevillea trichantha is the third species in the Triloba Group in which the perianth is consistently, but not always uniformly, hairy. A short key differentiating the three species is provided.
David J. Mabberley, 2021, The Latin name for Assam tea revisited and the further nomenclatural significance of the three editions of Julius Bosse’s Vollständiges Handbuch der Blumengärtnerei – and contemporary compendia, TAXON 00 (00), 1–8, 5 May 2021
Two early validly published names for Assam tea (Camellia sinensis var. assamica “(Choisy) Kitam.)”) are identified: Thea assamica Royle ex Hook. 1847 and T. assamica Hort. Belg. ex Bosse 1854; an amended synonymy and a neotypification (with D.-W. Zhao) for the name of Assam tea, C. sinensis var. assamica (Hook.) Steenis, are provided. The three editions (1829–1861) of Bosse’s Vollständiges Handbuch der Blumengärtnerei are also the neglected places of publication of some plant-names (or their ba- sionyms) in current use; Grevillea lawrenceana Bosse (neotype designated here by P.M. Olde) is an earlier name for G. curviloba McGill. (Proteaceae); …