Browsing by Author "Glen, Hugh Francis"

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    A revision of the Gibbaeinae (Mesembryanthemaceae)
    (1974) Glen, Hugh Francis; Schelpe, E A C L E
    Of the fourteen species of Gibbaeum recognised in this work, one, G. austricolum is new. A new combination, G. pubescens (Lettsom ex Haw.) N.E.Br. subsp. shandii (N.E.Br.) Glen, is made at the subspecific level. Three monospecific genera, Antegibbaeum, Didymaotus and Muiria, and two intergeneric hybrids, X Muiriogibbaeum and X Gibbaeophyllum, the latter here described for the first time, are recognised. A field study was made over the entire distribution range of the subtribe. Further studies were made of the vegetative, flower and fruit morphology, cuticular structure and seed and pollen morphology of the group. A numerical-taxonomic treatment of date gathered from these studies was made. Keys for field and herbarium use, as well as a polyclave, are provided. Various features of the cytology, habitat preferences, conservation status and possible evolution of the group are noted.
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    A taxonomic monograph of Lampranthus and allied genera (Mesembryanthemaceae)
    (1978) Glen, Hugh Francis; Schelpe, E A C L E
    For the first time since the genera were described, a taxonomic monograph of Lampranthus and its immediate allies was undertaken. A numerical study of 97 characters (132 character strings) of each of some 270 items was undertaken, using Hall's BOLAID package of numerical aids. The genus Lampranthus was reduced from about 240 species to 56. The genus Scopelogena was shown to be monotypic and closely related to Lampranthus. Braunsia was reduced from 5 species to 3. It is shown that the genera Oscularia and Esterhuysenia are inseparable from Lampranthus. Because Oscularia was described before Lampranthus, and because the latter is by far the better known, it is considered necessary to propose the conservation of Lampranthus over Oscularia. Such a proposal is included as an appendix. A new and more natural delimitation of the subtribe Lampranthinae, including Gibbaeinae and excluding the genera Cerochlamys, Disphyma and Ebracteola, is proposed.