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  1. Home
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Browsing by Subject "Taxonomy"

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    A rare new species of Polhillia (Genisteae, Fabaceae)
    (2010) Boatwright, James S
    The new species Polhillia ignota Boatwr. is described. This species is known only from two collections, one between Vredenburg and Saldanha and the other close to Porterville. The new species is most similar to P. obsoleta, which is known only from a few localities around Worcester, in its narrow, sericeous leaflets and flowers of equal size, but differs in its flattened mature leaves with larger leaflets (up to ± 12 mm long), longer pseudo-peduncles (up to ± 15 mm long), denser inflorescences (with up to four flowers), shorter pedicels (1–2 mm long) and non-auriculate wing- and keel petals.
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    Aspalathus abbottii (Fabaceae: Crotalarieae) a new species from KwaZulu-Natal South Africa
    (2011) Stirton, C H; Muasya, A M
    A new species Aspalathus abbottii C.H. Stirt. & Muasya, is described. The species is known only from Oribi Flats, KwaZulu-Natal, where it grows in grassland vegetation. The new species is characterised by its rigid spreading habit, densely and shortly villous branches, glabrous bracts and bracteoles, and 1(2) bright yellow flowers borne on short lateral shoots. It is most similar to other grassland species, A. frankenioides DC. and A. gerrardii H. Bol., all from the summer rainfall area of South Africa but differs in its rigid spreading habit, few bright yellow flowers per flowering branchlet, glabrous bracts and bracteoles, villous yellowish-green seasonal shoots, and its pale brown to tan over-seasonal branches with a blackish lattice of peeled bark.
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    Caesia sabulosa (Hemerocallidaceae), a new species from the Greater Cape Region of South Africa
    (2010) Boatwright, James; Manning, J C
    The new species Caesia sabulosa Boatwr. and J.C.Manning from deep sands along the West Coast of South Africa and sandy flats in the Cederberg and Bokkeveld Escarpment is described. It is distinguished by its extensively branched rhizome resulting in a robust, clump-forming habit, and unique ‘palisade’ root system of closely packed, hard, vertical roots; mostly larger flowers; erect fruiting pedicels; and details of the seed testa sculpturing.
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    Isolepis namaquana (Cypereae, Cyperaceae), a new endemic species from the winter rainfall area of South Africa
    (Elsevier, 2011) Muasya, A M; Viljoen, J; Stirton, C H
    A new species, Isolepis namaquana Muasya & J.Viljoen, is described and illustrated. It is known from two localities in Namaqualand: near Kamieskroon and at the foot of the Matsikammaberge, where it grows in ephemeral wetlands. The tufted annual species is diagnosed by floral and fruit characters including glume size, bifid stigma and colliculate nutlet surface ornamentation.
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    Morphology and taxonomy of Mondia (Apocynaceae: Periplocoideae)
    (2009) Venter, H J T; Verhoeven, R L; Bruyns, P V
    The bitypic Mondia Skeels is found in the moist tropical and subtropical forests of Africa. Both species are lianes with large leaves, fringe-like interpetiolar stipular ridges, large panicles and brownish, reddish to purplish flowers with conspicuous and well exposed gynostegia. Mondia resembles Batesanthus N.E.Br., Myriopteron Griff. and Tacazzea Decne. in being large woody climbers with large leaves, large many-flowered inflorescences, and rotate flowers with grooved translators and pollen of which the 4–6-porate grains are fused into tetrads. Mondia is distinguished from these genera by having fringe-like interpetiolar ridges and bi- or tri-segmented corona lobes. Batesanthus, furthermore, differs from Mondia by having fleshy interpetioler ridges, a corolla with recurvate tube and an annular corona. The species of Myriopteron and Tacazzea, in contrast to Mondia, have non-fleshy interpetiolar ridges, a herbaceous corolla with linear to narrowly ovate lobes, and in the case of Myriopteron keel-shaped follicles with lateral membranous fins. Apart from these three genera Mondia shows affinity to Chlorocyathus Oliv. and Stomatostemma N.E.Br. Although both genera are also large climbers, they are characterised by root tubers and flowers with campanulate corollas. Here we present descriptions of micro- and macro-morphological features of Mondia and its two species, as well as a key to the species and notes on distribution patterns, ecology and uses. We also discuss possible relationships with other genera among the Periplocoideae.
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    Notes on the genus Trachyandra (Asphodelaceae: Asphodeloideae) 1: A review of the T. thyrsoidea group (Section Trachyandra) including three new species from the Northern Cape
    (2010) Boatwright, James S; Manning, J C
    Three new species of the genus Trachyandra are described, T. hantamensis Boatwr. & J.C.Manning, T. kamiesbergensis Boatwr. & J.C.Manning and T. sanguinorhiza Boatwr. & J.C.Manning. These species form part of a group of morphologically similar species referred to here as the T. thyrsoidea group and are distinguished by their generally small stature, filiform leaves (except for T. tortilis), and simple or shortly branched racemes of patent flowers with maculate tepals. Many of the species in the group have roots that contain abundant anthraquinones, visible as a red substance below the outer skin of the roots, and which is soluble in alcohol, thus often staining herbarium papers purple. A synopsis of the eight species that comprise the T. thyrsoidea group is presented, with maps of each species and illustrations of those described as new.
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    A re-assessment of the genera Tridentea Haw. and Tromotriche Haw
    (Elsevier, 1995) Bruyns, P
    The generic delimitation of Tridentea Haw. and Tromotriche Haw. is considered, Eight species are retained in Tridentea: T. dwequensis (Lückhoff) Leach, T. gemmiflora (Masson) Haw., T. jucunda (N.E. Br.) Leach, I pachyrrhiza (Dinter) Leach, T. parvipuncta (N.E. Br.) Leach, T. marientalensis (Nel) Leach and T virescens (N.E. Br.) Leach. The remaining species are transferred to Tromotriche. Tromotriche engleriana (Schltr.) Leach is referred back to Stapelia as Stapelia engleriana Schltr. Tromotriche then consists of the following 11 species: T. aperta (Masson) Sweet, T. baylissii (Leach) Bruyns, T. choanantha (Lavranos & Hall) Bruyns, T. herrei (Net) Bruyns, T. longii (Lückhoff) Bruyns, T. longipes (Lückhoff) Bruyns, T. pedunculata (Masson) Bruyns, T. revoluta (Masson) Haw., T. ruschiana (Dinter) Bruyns, T. thudichumli (Pillans) Leach and T. umdausensis (Nel) Bruyns. Careful arguments are advanced to justify these changes.
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    The systematic position of Rhytidocaulon (Apocynaceae-Asclepiadoideae)
    (Cambridge University Press, 1999) Bruyns, P V
    Rhytidocaulon P.R.O. Bally is reviewed. The relationships with other genera are discussed in the light of the character assessment carried out and it is suggested that it is closest to Caralluma R. Br. subg. Caralluma and Echidnopsis Hook. f. Descriptions of the genus and the eight known species are provided.
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    Three new species and two new combinations in the Aizoaceae from the Western and Northern Cape of South Africa
    (2010) Klak, Cornelia
    Three new species of Aizoaceae from the Western Cape are described. Octopoma tanquanum Klak and Vlokia montana Klak are dwarf shrubby or mat-forming succulents which belong to the Ruschieae in the Ruschioideae. Mesembryanthemum knolfonteinense Klak of the Mesembryanthemoideae is a geophyte. Octopoma tanquanum inhabits relatively low lying arid areas within the Tanqua Karoo and the Little Karoo and is thought to be closely allied to the two species of Octopoma found in the Little Karoo. Both V. montana and M. knolfonteinense grow at relatively high altitudes within the fynbos biome. In addition, Ruschia littlewoodii L.Bolus is transferred to Phiambolia, and two new combinations are made in Antimima for Ruschia hexamera L.Bolus and Ruschia radicans L.Bolus.
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