Patterns of geophyte diversity and storage organ size in the winter-rainfall region of southern Africa

2005 ◽  
Vol 11 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Şerban Procheş ◽  
Richard M. Cowling ◽  
Derek R. du Preez
Keyword(s):  
Southern Africa ◽  
Organ Size ◽  
Storage Organ ◽  
Winter Rainfall ◽  
And Storage ◽  
Rainfall Region

New species and subspecies of Babiana, Hesperantha, and Ixia (Iridaceae: Crocoideae) from southern Africa; range extensions and morphological and nomenclatural notes on Babiana and Geissorhiza

Bothalia ◽  
2012 ◽  
Vol 42 (2) ◽  
pp. 137-145 ◽  
Author(s):  
P. Goldblatt ◽  
J. C. Manning
Keyword(s):  
New Species ◽  
Southern Africa ◽  
New Record ◽  
First Record ◽  
Winter Rainfall ◽  
Late Flowering ◽  
Typical Form ◽  
Northern Cape ◽  
Rainfall Region

Babiana rivulicola from stream banks in the Kamiesberg in Namaqualand and terete-leaved Ixia teretifolia from the Roggeveld, both in Northern Cape, are new species of these two largely winter-rainfall region genera. Late-flowering populations of Hesperantha radiata with crowded spikes of smaller flowers are segregated from the typical form as subsp. caricina. We also document the first record of B. gariepensis from Namibia, correct the authority for B. purpurea Ker Gawl., discuss morphologically aberrant populations of B. tubiflora from Saldanha, provide an expanded description for B. lapeirousiodes based on the second and only precisely localized collection of this rare Namaqualand species, and expand the circumscription of Geissorhiza demissa to accommodate a new record from the Kamiesberg, including revised couplets to the existing key to the species.

scholarly journals The distribution of the dwarf succulent genus Conophytum N.E.Br. (Aizoaceae) in southern Africa

Bothalia ◽  
2016 ◽  
Vol 46 (1) ◽  
Author(s):  
Andrew J. Young ◽  
Philip G. Desmet
Keyword(s):  
Climate Change ◽  
South Africa ◽  
Southern Africa ◽  
Conservation Planning ◽  
Cape Floristic Region ◽  
Geographical Range ◽  
Western Cape ◽  
Succulent Karoo ◽  
Winter Rainfall ◽  
Rainfall Region

Background: The dwarf succulent genus Conophytum N.E.Br. is one of the most species rich in the Aizoceae. The genus is most closely associated with a region of high floral endemism and biodiversity, the Succulent Karoo biome in south-western Africa.Objectives: To examine the distribution of Conophytum in south-western Namibia and in the Northern and Western Cape Provinces of South Africa.Method: A database comprising 2798 locality records representing all known species and subspecies of the genus Conophytum has been constructed.Results: The genus is primarily restricted to the arid winter-rainfall region of the Northern and Western Cape Provinces of South Africa and south-western Namibia, within the Greater Cape Floristic Region. Whilst taxa are found across all the main biomes in the region (the Succulent Karoo, Nama Karoo, Desert and Fynbos biomes), 94% of Conophytum taxa are found only in the Succulent Karoo biome and predominantly (88% of taxa) within South Africa. Endemism within specific bioregions is a feature of the genus and ~60% of taxa are endemic to the Succulent Karoo. Approximately 28% of all taxa could be considered point endemics. Whilst the genus has a relatively wide geographical range, we identify a pronounced centre of endemism in the southern Richtersveld.Conclusion: The genus Conophytum can be used as a good botanical model for studying patterns of diversity and speciation in the Succulent Karoo biome, the effects of climate change on dwarf succulents, and for informing conservation planning efforts.

Phytogeography of Pelargonium

Bothalia ◽  
1983 ◽  
Vol 14 (3/4) ◽  
pp. 517-523 ◽  
Author(s):  
J. J. A. Van der Walt ◽  
P. J. Vorster
Keyword(s):  
Southern Africa ◽  
Summer Rainfall ◽  
Western Cape ◽  
The South ◽  
Winter Rainfall ◽  
Distribution Maps ◽  
Present Distribution ◽  
The Individual ◽  
Rainfall Region

The vast majority of the approximately 2(H) species of Pelargonium oeeurs in Africa. About SO per cent of the species are endemic to the winter rainfall region of the Cape Province, and the centre of distribution lies in the south-western Cape. The distribution of the individual sections are discussed with the aid of distribution maps. The centre of distribution of most sections is in the south-western Cape, hut a few sections are centred in the eastern and western Cape. Several sections are represented by a few species in the summer rainfall region of southern Africa. As no fossils of Pelargonium are known, deductions about the origin of the genus can only be based on the present distribution of species, according to which arguments in favour of both a northern and a southern origin can he supported.

Occurrence of putatively resistant plantago in the winter rainfall region of South Africa: a survey

2021 ◽  
Vol 38 (5) ◽  
pp. 411-415
Author(s):  
Vhuthu Ndou ◽  
Ethel E Phiri ◽  
Frederik H Eksteen ◽  
Petrus J Pieterse
Keyword(s):  
South Africa ◽  
Winter Rainfall ◽  
Rainfall Region

New synonyms and a new name in Asteraceae: Senecioneae from the southern African winter rainfall region

Bothalia ◽  
2010 ◽  
Vol 40 (1) ◽  
pp. 37-46
Author(s):  
J. C. Manning ◽  
P. Goldblatt
Keyword(s):  
High Resolution ◽  
Digital Images ◽  
Taxonomic Status ◽  
Herbarium Specimens ◽  
Winter Rainfall ◽  
New Name ◽  
New Synonyms ◽  
Rainfall Region

A review of the genera Othonna and Senecio undertaken for the forthcoming Greater Cape plants 2: Namaqualand-southern Namib and western Karoo (Manning in prep.) led to a re-examination of the taxonomic status of several species. This was facilitated by the recent availability of high-resolution digital images on the Aluka website (www.aluka.org) of the Drege isotypes in the Paris Herbarium that formed the basis of many species described by De Candolle in his Prodromus systematis naturalis regni vegetabilis. These images made it possible to identify several names whose application had remained uncertain until now. Each case is briefly discussed, with citation of additional relevant herbarium specimens. The following species are reduced to synonomy: O. incisa Harv. is included in O. rosea Harv.; O. spektakelensis Compton and O. zeyheri Sond. ex Harv. are included in O. retrorsa DC.; S. maydae Merxm. is included in S. albopunctatus Bolus, which is now considered to include forms with radiate and discoid capitula; S. cakilefolius DC. is included in  O. arenarius Thunb.; S. pearsonii Hutch, is included in O. aspertdus DC.; S. parvifolius DC. is included in S. carroensis DC.; S. eriobasis DC. is included in S. erosus L.f.; and S. lobelioides DC. is included in S. flavus (Decne.) Sch.Bip. The name S. panduratus (Thunb.) Less, is identified as a synonym of S. erosus L.f. and plants that are currently know n under this name should be called S. robertiifolius DC. The confusion in the application o f the names O. perfoliata (L.f.) Jacq. and O. filicaulis Jacq. is examined. O. perfoliata is lecto- typified against a specimen in the Linnaean Herbarium (LINN)  w ith radiate capitula. The name O. filicaulis correctly applies to a radiate species and is treated as a synonym of O. perfoliata. The vegetatively similar taxon with disciform capitula that is currently known as O. filicaulis should be known as ()  undulosa (DC.) J.C.Manning  Goldblatt, comb. nov. The new name O. daucifolia J.C.Manning Goldblatt is provided to replace the later homonym O. abrotanifolia (Harv.) Druce.

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