A taxonomic Revision of Calytrix Labill. (Myrtaceae)

A taxonomic revision of Calytrix Labill., an Australian endemic genus of Myrtaceae, tribe Chamelaucieae, is presented. Lhotskya Schauer is reduced to a synonym of Calytrix. Seventy-two species are recognized of which the following 22 are described as new: C. amethystina, C. carinata, C. chrysantha, C. divergens, C. duplistipulata, C. eneabbensis, C. erosipetala, C. formosa, C. gurulmundensis, C. gypsophila, C. habrantha, C. islensis, C. microcoma, C. parvivallis, C. paucicostata, C. platycheiridia, C. praecipua, C. rupestris, C. similis, C. truncatifolia, C. verruculosa and C. warburtonensis. Two species comprise two subspecies each, of which one, C. simplex subsp. suboppositifolia, is also described as new. Other than autonyms the following new names result from the transfer of Calycothrix and Lhotskya species to Calytrix, and/ or changes in taxonomic rank: C, acuttfolia, C, breviseta subsp. stipulosa, C. brownii, C. drummondii, C. glaberrima, C. harvestiana, C. merrelliana, C. nematoclada, C. purpurea, C. smeatoniana and C. sylvana. Distinctive features of the morphology are discussed. A new term, cheiridium, is proposed for an apparently adaptive structure formed from the peduncle and persistent, connate bracteoles. Other biological aspects that are discussed briefly include floral biology, fruit and dispersal, and geography. An informal infrageneric classification, based largely upon floral features, is outlined. New taxa are illustrated. Distribution maps are provided for all taxa.

Franciscodendron (Sterculiaceae), a new tree genus from Queensland.

A new monotypic genus, Franciscodendron B. Hyland & Steenis is described for the first time, based on Sterculia laurifolia F. Muell. A comparison with nine genera of the tribe Sterculieae indicates that Franciscodendron has its closest relationship with Hildegardia.

Eucalyptus fusiformis (Myrtaceae), a new species of Ironbark (in the Informal E. series Paniculatae Pryor et Johnson) from North-eastern NSW.

A new species, Eucalyptus fusiformis Boland et Kleinig, from the north coast of New South Wales is described. Its taxonomic position is in E. subgenus Symphyomyrtus series Paniculatae following the informal classification of eucalypts proposed by Pryor and Johnson (1971). E. fusiformis is characterised by its flowers, fruits and adult leaves. In the bud the staminal filaments are fully inflected while the androecium has outer staminodes and the anthers are cuboid and adnate. The fruits are narrow, often truncate fusiform, tapering into long slender pedicels. The adult leaves are dull grey, concolorous and hypoamphistomatic. The species resembles the more numerous and often co-occurring ironbark E. siderophloia which has similar adult and seedling leaves. The volatile oils of both species are very similar. The ecology, distribution, taxonomic affinities and conservation status are discussed.

Two new Ironbarks and a new Bloodwood (Eucalyptus, Myrtaceae) from Queensland.

Two new ironbarks of the informal Eucalyptus series Crebrae Brooker, E. exilipes and E. xanthoclada, and a new bloodwood of the informal E. section Rufaria Pryor & Johnson, E. lamprophylla, are described. The three species occur in north Queensland, centred on the Pentland area south-west of Townsville.

Variation in Eucalyptus cypellocarpa L. Johnson in Victoria, and a new taxon form the Grampian Ranges and Anglesea

Patterns of variation in adult and seedling morphology, seedling growth and root/shoot ratios were assessed for populations of E. cypellocarpa, E. goniocalyx and equivocal populations from the Grampian Ranges and Anglesea. F1 hybrids of the two species were also produced to assist evaluation of a previous hypothesis of phantom hybrid origin. The Grampians populations were similar to E. cypellocarpa in adult morphology, but had distinctly different seedlings that were not the same as the F1 hybrids. The Anglesea population, although intermediate between E. cypellocarpa and E. goniocalyx in some adult characters, had the same seedling form, including root/shoot ratio, and the same bark type as the Grampians populations. The study provided no evidence to support the hypothesis of a phantom hybrid origin for the Grampians and Anglesea forms. A more parsimonious interpretation is evolution by the splitting of an ancestral taxon. The Grampians and Anglesea populations are described as E. alaticaulis sp. nov., with minor population variation being interpreted as a result of geographic disjunction.

Two brown-spored species of the Lichen Genus Polyblastiopsis.

Two taxa of pyrenocarpous lichens with brown, muriform spores, previously included in the genus Anthracothecium, are trans- ferred to the genus Polyblastiopsis. An emended description of Polyblastiopsis is given. A new species, Polyblastiopsis muelleri, is described and a new combination, Polyblastiopsis monosporum, is made.

A revision of Homalocalyx, F.Muell. (Myrtaceae)

The endemic Australian genera Homalocalyx F. Muell. and Wehlia F. Muell. (both Myrtaceae, Chamelaucieae) are found to be congeneric. The enlarged genus Homalocalyx comprises eleven species of which only two already have valid names in Homalocalyx. New combinations are effected for the six accepted, previously described, species of Wehlia, and three species are described as new: H. chapmanii, H. echinulatus and H. inerrabundus.

The recongnition and geograpic distribution of Gossypium nelsonii (Malvaceae)

Field and herbarium observations support the recognition of Gossypium nelsonii Fryx. as a species distinct from G. australe F. Muell. Herbarium records indicate the range of G. nelsonii to be from the Ormiston Gorge area in the Northern Territory to the Richmond area in Queensland.

Variation in Banksia oblongifolia Cav. (Proteaceae)

Banksia oblongifolia Cav. is presently regarded as a variable species. The variation, however, appears to be discontinuous, thereby permitting the rec- ognition of two taxa differing in seedling and adult morphology and ecology. Differences are reported between these taxa in plant height, leaf length, branch length, stem number, seed set and shape, as observed for populations growing in the field, and cotyledon length, leaf length, plant height and lignotuber development, under cultivation. A new varietal combination, Banksia oblongifolia var. minor (Maiden & Camfield) Conran & Cliff, is recognised and circumscribed for one of the taxa. Banksia oblongifolia var. oblongifolia is redefined. The relationships between the two taxa are discussed.

Dodonaea biloba (Sapindaceae). a new species from South-eastern Queensland, Australia.

A new species of Dodonaea. D. biloba, from south-eastern Queensland, is described and illustrated and its affinities within the genus are discussed.