Systematic studies in the eucalypts. 7. A revision of the bloodwoods, genus Corymbia (Myrtaceae)

Abstract

185Hill, KD. & Johnson, L.A.S. (National Herbarium of New South Wales, Royal Botanic Gardens, Sydney, Australia 2000) 1995. Systematic studies in the eucalypts. 7. A revision of the bloodwoods, genus Corymbia (Myrtaceae). Telopea 6(2-3): 185-504. A taxonomic revision of the bloodwoods (including 'ghost gums') is presented. Previous cladistic studies in the eucalypts are re-evaluated; new phylogenetic analyses are presented for the Angophora + Eucalyptus sens. lat. group, the Angophora + blood wood dade, and the sections and series of the 'red bloodwoods'.The non-angophoroid, non-bloodwood eucalypts are discussed, but a formal taxonomic system for these is not presented here. The bloodwoods are placed in a new genus Corymbia K.D. Hill & L.A.S. Johnson. Relationships within the group are examined, and morphological interpretation and phytogeography are discussed. An infra generic classification is presented, with keys to infra generic groupings and species. One hundred and thirteen species are described, 33 of them new (c. chlorolampra, C. maritima, C. ligans, C. plena, C. hendersonii, C. rubens, C. porphyritica, C. semiclara, C. tum esc ens, C. opacula, C. pedimontana, C. sphaerica, C. chartacea, C. dunlopiana, C. pachycarpa, C. papillosa, C. catenaria, C. paracolpica, C. arafurica, C. bella, C. disjuncta, C. pauciseta, C. karelgica, C. dendromerinx, C. torta, C. chillagoensis, C. inobvia, C. blakei, C. candida, C. punkapitiensis, C. aparrerinja, C. flavescens, C. paractia). New subspecies are described or recognised in C. trachyphloia (subspp. amphistomatica and carnarvonica), C. arnhemensis (subsp. monticola), C. hylandii (subsp. peninsularis), C. eremaea (subsp. oligocarpa), C. cadophora (subsp. pliantha), C. setosa (subsp. pedicellaris), C. ferruginea (subsp. stypophylla), C. pachycarpa (subsp. glabrescens), C. papillosa (subsp. globifera), C. deserticola (subsp. mesogeotica), C. torta (subspp. allanii and mixtifolia), C. blakei (subsp. rasilis), C. candida (subspp. dipsodes and lautifolia), C. ferriticola (subsp. sitiens), C. grandifolia (subspp. lamprocardia and longa). A new name is provided for the species illegitimately known asEucalyptus perfoliata (c. cadophora), and a valid publication of C. aparrerinja (published invalidly as a variety of E. papuana by Blakely) is effected. Two species are reinstated from synonymy (c. polysciada and C. variegata), and two raised from infra specific to specific rank (c. dallachiana and C. dimorpha). Lectotypes are designated for the names E.

Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae)

“…By morphology and fossil record, Eucalyptus is the closest clade to Corymbia and Angophora. It is not clear whether this failure to amplify Corymbia specific SSRs in Eucalyptus, while successfully amplifying all the loci in Eucalyptopsis group, reflects relative evolutionary distances, since the branch lengths for the Eucalyptopsis group and Eucalyptus relative to Corymbia were inconsistent between datasets (e.g., Hill and Johnson, 1995;Steane et al, 2002;Wilson et al, 2001;Parra-O et al, 2006). This observation may indicate that Eucalyptus is a faster evolving clade, thereby accumulating more mutations in the flanking sequences of the SSRs.…”

“…This observation may indicate that Eucalyptus is a faster evolving clade, thereby accumulating more mutations in the flanking sequences of the SSRs. SSR analysis excluded Arillastrum because available morphological and molecular data (Hill and Johnson, 1995;Udovicic and Ladiges, 2000;Wilson et al, 2001;Steane et al, 2002) put this genus the farthest from Corymbia among the eucalypts; Ladiges et al (2003) suggested, based on biogeography, that the divergence of Arillastrum from the other eucalypt genera may be as old as Late Cretaceous (70 MYA; see also Crisp et al (2004). These data suggested a potentially low prospect of transferring Corymbia SSRs to Arillastrum.…”

“…Within Corymbia, nine species were sampled from the red bloodwood group (sections Rufaria and Apteria) (Hill and Johnson, 1995), seven from the yellow Eucalypt microsatellite phylogeny 1127 Table 1 -List of taxa used in this study, including those analysed previously in the ITS study of Steane et al (2002). Names are those in the classification of Hill & Johnson (1995 New taxa analysed in this study but not in the ITS analysis of Steane et al (2002).…”

“…bloodwoods assemblage (Ochraria, Politaria, Cadagaria) and two paper-fruited bloodwoods (section Blakearia) (Hill and Johnson 1995). C. eximia and C. torelliana included two samples each.…”

Anatomia foliar de Corymbia calophylla (Lindl.) K.D.Hill & L.A.S. Johnson, Myrtaceae

“…Corymbia, estabelecido a partir de 1995 como um novo grupo taxonômico de Myrtaceae (Hill & Johnson, 1995), é composto por aproximadamente 113 espécies arbóreas anteriormente incluídas em Eucalyptus L'Hér. No entanto, os estudos relativos às atividades biológicas desse grupo têm sido efetuados, especialmente, envolvendo a espécie Corymbia citriodora (Hook.)…”