Taxonomic history, growth habit and life•form are described for Gnaphaliuni section Euchiton in New Zealand. The floristic account which follows includes a key to the 11 species, 2 subspecies and 2 varieties together with diagnosis, description, reasoned synonymy and notes on habitats, variation and New Zealand distribution for each taxon. New taxa are Gnaphalium limosum. G. audax. G. audax subsp. ruahinicum. G. delicatum and G. ensiler. G. paludosum var. polylepis is a new name. Morphological relationships and geographical distributions within Euchiton are discussed. An index to New Zealand Gnaphalium synonymy completes the treatment.
A synoptical key based on vegetative characters and a general key incorporating both the floral and vegetative diversity are given for the identification of the New Zealand shrubby Senccioneae and their wild and garden hybrids. Some 20 hybrids are recognised; of these four were previously known under the species names Senecio lapidosus Cheesem., S. matthewsii Petrie, S. remotlfolius Petrie, and S. sprde11l/ Petrie. Four hybrids appear to involve Senedo shrubs and scapigcrous rosette herbs as parents, and another pair prove to be intertteneric hybrids between Bracl,yglottis and shrubby senedos. Anatomical, paly• nological, and distributional data are given in evidence of hybridity. Two taxa, Smedo prntacopus and Bruchyglottis re panda variety f ragruns, are described for the first time, and Senecio myrianrlws Checsem. is transferred to the genus Brachyglottis.
Thirty‐seven species representing eight of the nine subtribes of the tribe Inuloideae‐Compositae were examined for the presence of crystals in the achene wall, fibers within the phloem, and schizogenous resin canals in the aerial stem. Leaf hair type and the size of the widest xylem element were also recorded for each species. These comparative observations point to the presence of two major groups which are completely obscured by current taxonomic practice. Comparative palynological and cytological data already in the literature are readily interpreted in the light of this suggested grouping.
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