bluuebunny/crossref_metadata_2025_split huggingface dataset:
Notes on <i>Plectranthus</i> (Lamiaceae) from southern Africa
Authors: Van Jaarsveld E. J. , Edwards T. J. 
Published: July 2015

Four new Plectranthus taxa from South Africa are described: P. malvinus Van Jaarsv. TJ.Edwards, P. saccatus subsp. pondoensis Van Jaarsv. S.Milstein, P. purpuratus subsp. tongaensis Van Jaarsv. TJ.Edwards and P. purpuratus subsp. montanus Van Jaarsv. TJ.Edwards. P. aliciae (Codd) Van Jaarsv. TJ.Edwards and P. lucidus (Benth.) Van Jaarsv. TJ.Edwards are given new status, and P. pentheri (Giirke) Van Jaarsv. TJ.Edwards is transferred to this genus from Coleus and recognized as a species.
Studies in the liverwort genus Fossombronia (Metzgeriales) from southern Africa, 1. Three new species from Northern Province, Gauteng and Mpu­malanga
Authors: Perold S. M. 
Published: July 2015

Three new species of Fossombronia from Northern Province, Gauteng and Mpumalanga (formerly Transvaal) are described: F. gemmifera, F. glenii and F. straussiana. F. gemmifera is distinguished by a highly convoluted pseudoperianth, the frequent presence of gemmae produced dorsally on the stem, lamellate spores and mostly rather short elaters; F. glenii can be recognized by a smallish, deeply lobed pseudoperianth, perigonial bracts with finger-like projections shielding the antheridia and by spinous spores; F. straussiana is distinct by its hyaline or brownish rhizoids, by its dense, frilly leaves, its pseudoperianth with lamellate lateral outgrowths, by spore ornamentation that usually has inclusions in the incomplete areolae and by the elaters which are finely papillose.
Taxonomic notes on the Geastraceae, Tulostomataceae, Nidulari- aceae and Sphaerobolaceae (Gasteromycetes) sensu Bottomley, in southern Africa
Authors: Coetzee J. C. , Eicker A. , Van Wyk A. E. 
Published: July 2015

Bottomley’s (1948) Gasteromycetes of South Africa is still widely used for identification purposes. However, as a result of developments since 1948, the work has become outdated in many respects. Entries in the Geastreae (Lycoperdaceae), Tulostomataceae, Nidulariaceae and Sphaerobolaceae sensu Bottomley (1948) that require updating are listed and brieflycommented on.
Studies in the liverwort genus <i>Fossombronia</i> (Metzgeriales) from southern Africa. 6. New species from Lesotho, Swaziland and Mpumalanga and new records from Lesotho
Authors: Perold S. M. 
Published: July 2015

Two new species of Fossombronia are described: F. angulifolia Perold from Lesotho and F. swaziensis Perold from Swaziland and Mpumalanga. F. angulifolia is characterised by erect or semi-erect, 2-4-lobed, angular leaves, by mostly incompletely reticulate spores and by rather short elaters F. swaziensis can be recognised by large, rounded or sometimes shallowly notched leaves, which are rather stiff and bi- to multistratose basally, by quite large perigonial bracts in the male plants and by spores which have irregular areolae containing tubercular inclusions
Studies in the liverwort genus <i>Fossombronia (Metzgeriales) from southern Africa. 7. F. capensis var. spiralis, a new variety from Western Cape
Authors: Perold S. M. 
Published: July 2015

Fossombronia capensis S.W.Amell var. spiralis Perold, var. nov. from Western Cape is described. It is distinguished from the typical variety by a suite of characters, the most obvious being the strong spirals in the elaters. In F. capensis var. capensis the spirals are weak except for two Arnell collections in which they are quite strong. Subtle differences in spore ornamentation are then, perhaps, the most definitive character to separate the two varieties.
Taxonomic studies in the Aizoaceae from South Africa: three new species and some new combinations
Authors: Klak C. 
Published: July 2015

Two new species of Brownanthus, B glareicola Klak and B fratemus Klak and one new species of Scopelogena, S. bruynsii Klak are described. S. gracilis L.Bolus is reduced to synonymy under S. verruculata (L.) L Bolus. Three new combinations are made: Antimima excedens (L.Bolus) Klak. Erepsia dunensis (Sond.) Klak and Hammeria meleagris (L.Bolus) Klak and full synonomy is given Lampranthus maximilianii (Schltr. A.Berger) L Bolus is transferred back to Braunsia maximilianii (Schltr. A Berger) Schwantes and the identity of Ruschia polita L Bolus is discussed. The taxonomic position of Mesembryanthemum purpureostylum L.Bolus is clarified.
Morphology and anatomy of the rhizome and frond in the African species of <i>Polystichum</i> (Pteropsida: Dryopteridaceae)
Authors: Roux J. P. , Van Wyk A. E. 
Published: July 2015

The generic circumscription of the polystichoid ferns within the Dryopteridaceae and their relationships has been and still is much debated. Although floristic accounts for Polystichum are available for many parts of the world, its morphology and evolutionary trends within the genus are still poorly understood. In this study, primarily based on the Polystichum species from Africa and neighbouring islands, the morphology and anatomy of the rhizome and frond are addressed. Several species from other genera within the Dryopteridaceae are used for comparison, to gain a better understanding of generic affinities and evolution in this family.
Four new species of ,<i>Erica</i> (Ericaceae) from Western Cape, South Africa
Authors: Oliver E. G. H. , Oliver I. M. 
Published: July 2015

Four new species of Erica L. from the mountains of Western Cape are described: E. richardii E.G.H.Oliv., rare and localized on quartzite cliffs in the foothills of the Great Swartberg north of Klaarstroom, E. anemodes E.G.H.Oliv., and E. viminalis E.G.H.Oliv., both restricted to the Hex River and adjacent mountains, and E. limnophila E.G.H.Oliv., rare around high altitude marshes in the Wemmershoek and Dutoitskloof Mountains.
The genus <i>Ehretia</i> (Boraginaceae: Ehretioideae) in southern Africa
Authors: Retief E. , Van Wyk A. E. 
Published: July 2015

The genus Ehretia P.Browne in southern Africa is revised. Six species and five subspecies of Ehretia are currently rec­ognized in southern Africa, of which E. alba Retief A.E.van Wyk, E. namibiensis Retief A.E.van Wyk subsp. namibi­ensis, E. namibiensis subsp. kaokoensis Retief A.E.van Wyk, E. rigida subsp. silvatica Retief A.E.van Wyk and E. rigida subsp. nervifolia Retief A.E.van Wyk are newly described. The genus is widely distributed in the region and occurs in a variety of habitats, ranging from the forests of the Eastern Cape to the hot, arid, semidesert parts of Namibia. Members of Ehretia in southern Africa are predominantly multistemmed shrubs or small trees. Characters of the leaf, the trichome com­plement, inflorescence and corolla are used to distinguish between the different species. A key to the species, distribution maps and illustrations of various micro- and macromorphological as well as palynological features are provided.
Studies in the genus <i>Riccia</i> (Marchantiales) from southern Africa. 25. A new species in subgenus <i>Ricciella</i>, section <i>Ricciella</i>
Authors: Perold S. M. 
Published: July 2015

Riccia sibayenii Perold is a new species, recently collected in Mpumalanga, near Sibayeni and has been named for this town, which is close to the Mozambique border and is in the summer rainfall area. R. sibayenii is distinguished by lime- green, medium-sized to quite large thalli with a chlorophyllose dorsal epidermis, air pores that soon enlarge and lead into mostly 6-sided air chambers below; ventrally with a thin median layer of storage tissue; ventral scales absent and the rhizoids all smooth. The spores are winged and polar, the distal face completely or incompletely reticulate and the proxi­mal face ornamented with fine to coarse, sometimes spinose granules.
The genus <i>Buglossoides</i> (Boraginaceae) in southern Africa
Authors: Retief E. , Van Wyk A. E. 
Published: July 2015

The genus Buglossoides Moench, a member of the family Boraginaceae. subfamily Boraginoideae. tribe Lithospermeae. is revised tor the Flora of southern Africa (FSA) region. Buglossoides comprises about seven species of annual, biennial or perennial herbs and subshrubs native to Asia, southern Europe and northern Africa. B. arvensis (L.) I.M Johnst.. a naturalized weed in many parts of the world, is the only member of the genus represented in the flora of southern Africa, presumably introduced with imported cereal seed. Although the similar polyaperturate pollen grains of Buglossoides and Lithospermum support the view that they are congeneric, they are retained as separate entities here. Diagnostic characters, a full description, various illustrations and a distribution map of B. arvensis in southern Africa are given.
The taxonomic significance of trichome type and distribution in <i>Melolobium</i> (Fabaceae)
Authors: Moteetee A. , Van Wyk B-E. , Tilney P. M. 
Published: July 2015

All species of Melolobium Eckl. Zeyh. were examined for epidermal features and particularly the glands which are a distinctive feature amongst the southern African Genisteae. For comparative purposes, three species of Argxrolobium Eckl. Zeyh.. all five species of Dichilus DC. and five species of Polhillia C.H.Stirt. were also examined for trichome type and distribution. Three trichome types are recognized in Melolobium. Trichome type and distribution provide an important insight into taxonomic relations at species level in Melolobium and sometimes even allow a distinction between regional forms. The distribution of glands (sessile and stalked) is of considerable diagnostic value in identifying species of Melolobium. A key to all the species of the genus based mainly on type and distribution of trichomes. is presented.
Studies in the genus <i>Machairopliyllum</i> (Mesembryanthemaceae), with notes on some related genera
Authors: Kurzweil H. , Chesselet P. 
Published: July 2015

Machairophyllum Schwantes is a small genus of the family Mesembry anthemaceae. confined to the southern part of central South Africa from the Little Karoo at Barrydale in the west to the Zuurberg near Kirkwood in the east. Machairo­phyllum is unusual in the Mesembryanthemaceae-Ruschioideae in that fynbos and renosterveld are the preferred habitats. The morphology, anatomy as well as the pollen, seed and leaf epidermis ultrastructure of the genus were examined. The taxonomy of Machairophyllum is revised on the basis of data presented. Of the ten names originally described, only four are upheld. M. alhidum (L.) Schwantes, M. stayneri L.Bolus. M. bijliae (N.E.Br.) L.Bolus and M. brevifolium L.Bolus. All four species are very similar in their vegetative habit, and differ mainly in inflorescence and flower characters. Several presumably related genera. Bijlia N.E.Br.. Carruanthus (Schwantes) Schwantes and Cerochlamys N.E.Br.. are briefly discussed.
Taxonomy of the genus <i>Passerina</i> (Thymelaeaceae)
Authors: Bredenkamp C. L. , Van Wyk A. E. 
Published: July 2015

Passerina L. is mainly a southern African genus, comprising 20 species and four subspecies. A few species occur along the Great Escarpment, two extend into Zimbabwe and Mozambique, but most are concentrated in the Cape Floristic Region. Palynological. macromorphological and anatomical evidence was used in the delimitation of the genus and its infrageneric taxa. A cladistic study supports Passerina as a monophyletic genus. A genus treatment, key to species and a full species treatment are given. Each species treatment includes a taxonomic diagnosis, description and notes on taxonomy, etymology, economic value and distribution. Illustrations of representative species are provided and distribution maps are included for each species. P. esterhuyseniae Bredenk. A.E.van Wyk is newly described. A list of excluded species names highlights the previous cosmopolitan taxonomic interpretation of Passerina. as many names are now in synony my under other genera of the Thymelaeaceae.
A new <i>Cyrtanthus species</i>(Amaryllidaceae: Cyrtantheae) endemic to the Albany Centre, Eastern Cape, South Africa
Authors: Snijman D. A. 
Published: July 2015

Cyrtanthus macmasteri Snijman is a rare new species from the Albany Centre of endemism. Eastern Cape. South Africa. Most closely related to C. galpinii Baker, and autumn-flowering species with a single or rarely-flowered inflorescence from the northern regions of southern Africa. C macmasteri is distinguished by a 3 to 6-flowered inflorescence. It grows on steep banks of the Great Kei River and its tributaries and flowers in summer.
Embryology and systematic relationships of <i>Kiggelaria</i> (Flacourtiaceae)
Authors: Steyn E. M. A. , Van Wyk A. E. , Smith G. F. 
Published: July 2015

Kiggelaria L. is endemic to Africa and the only representative of tribe Pangieae (Flacourtiaceae) on the continent. Molecular genetics, phytochemistry and host-parasite relationships have indicated a relationship between this woody, pantropical tribe of Flacourtiaceae and a small, trigeneric family of herbaceous, southern African endemics, the Achariaceae. In the present study, ovule and seed structure in Kiggelaria were investigated and compared with relevant data recently reported for Achariaceae. Support for an alliance with Achariaceae were found in the presence of anatropous, bitegmic. sessile ovules with zigzag micropyles. deep-lying embryo sacs covered by an epistase in the ovule and seed, endotestal-exotegmic seed coat layers, suspensorless embryos and sarcotestal seed with a prominent, plate-like hypostase. Unlike Achariaceae. Kiggelaria seeds do not have chalazal seed lids, pronounced raphal ridges, a fringe layer, or stomata in the outer epidermis of the sarcotesta. Structural dissimilarities in seeds of omithochorous Kiggelaria and myrmeco- chorous Achariaceae were regarded as adaptations linked to adifferent strategies for seed germination and dispersal.
Functional and taxonomic significance of seed structure in <i>Salix mucronata</i> (Salicaceae)
Authors: Steyn E. M. A. , Smith G. F. , Van Wyk A. E. 
Published: July 2015

The polymorphic African willow, Salix mucronata Thunb., is a widely distributed African tree and a riparian rheophyte. Ovule-to-seed development is reported for Salix mucronata subsp. woodii (Seemen) Immelman. Contrary to some existing reports, the tuft of silky hairs enveloping the seed in Salix is derived from the funicle and not the placenta. The micromor- phological structure of the hilar aril and funicular-placental and arillate hairs is described and illustrated for the first time.Willow seeds are primarily wind-dispersed, but have additional characters, such as a hydrophobic seed coat and an unwet- table, hairy, hilar aril as specific adaptations for distribution by water, perhaps even chance dispersal by animal visitors to the riverine habitat. Seed adaptations linked to different dispersal strategies may account for seemingly marked differences in ovule/seed structure between Salicaceae S. str. and related, mainly zoochorous flacourtiaceous taxa. recently classified with the former in a more inclusively circumscribed Salicaeae s.l.
New species in the section <i>Multinerviae of <i>Cliffortia</i> (Rosaceae)
Authors: Whitehouse C. M. 
Published: July 2015

Three species complexes in section Multinerviae DC. of Cliffortia L. are discussed. Two of the varieties of C. ilicifolia L. are raised to specific rank: C. reniformis and C schlechteri. as are both varieties of C. grandifolia Eckl. Zevh.: C denticulata and C recurvata Two new species are described that were previously included within the variable species C dregeana C. Presl: C acanthophylla and C. ceresana. Three further new species belonging to section Multinerviae are also described: C oligodonta, C. prionota and C seandens
Three cryptic new species of <i>Aristea</i> (Iridaceae) from southern Africa
Authors: Goldblatt P. , Dold A. P. , Manning J. C. 
Published: July 2015

Field work in southern Africa over the past several years has resulted in the discovery of three new species of the sub- Saharan African and Madagascan genus Aristea Aiton, which now comprises some 53 species. Aristea has a pronounced centre in southern Africa and a centre of diversity in the winter rainfall zone of the subcontinent, where all three new species occur, one extending eastward into the adjacent southern edge of the summer rainfall zone. All three novelties have been collected in the past but were confused with related species. A elliptica (subgenus Eucapsulares), confused in the past with A. pusilla (Thunb.) Ker Gawl., has a more robust habit, usually with 4 or 5 flower clusters per flowering stem, pale blue flowers, smooth ellipsoid seeds with flattened surface cells, and pollen shed as monads, whereas A. pusilla usually has 1-3 flower clusters per flowering stem, dark blue flowers, pollen shed as tetrads, and globose seeds with faint foveate sculpturing and colliculate surface cells. A. nana (also subgenus Eucapsulares), known from few collections, and also confused with A. pusilla or A. anceps Eckl. ex Klatt. has the unbranched and leafless flowering stem of the latter but has large green floral spathes, flowers borne on long pedicels, and lacks a leaf subtending the single terminal flower cluster in contrast to nearly sessile flowers in A. pusilla and A. anceps, and in the latter, dry, rusty spathes. A. cistiflora (subgenus Pseudaristea) closely resembles A. teretifoha Goldblatt J.C.Manning but has linear to narrowly sword-shaped leaves and ± secund flowers with the outer tepals only slightly smaller than the inner and with small, dark brown markings at the bases of all the tepals. In contrast, A. teretifolia has narrower, sometimes terete leaves and flowers held upright with the outer tepals notice-ably smaller than the inner and bearing dark markings covering the lower half, whereas the inner tepals are unmarked.
Lamarck’s new species of Mesembryanthemaceae and the types of their names
Authors: Chesselet P. , Pignal M. 
Published: July 2015

The holotype of Mesembryanthemum echinatum Lam. is an unpublished, sketchy drawing kept in the Lamarck herbarium (P-LAM). The holotype of the name M. vaginatum Lam., which has not been taken up again since its original publication, is also in P-LAM. That name has priority over M. ciliatum Aiton, pertaining to a species currently placed in Brownanthus.Two new combinations are proposed: Brownanthus vaginatus (Lam.) Chesselet M.Pignal and Brownanthus vaginatus subsp. schenckii (Schinz) Chesselet M.Pignal.
<i>Eremiolirion</i>, a new genus of southern African Tecophilaeaceae, and taxonomic notes on <i>Cyanell</i>a alba
Authors: Manning J. C. , Forest F. , Mannheimer C. A. 
Published: July 2015

The generic affiliation of Cyanella amboensis Schinz has been uncertain since the species was excluded from the genus Cyanella L. in 1991. The species has two leaves, a divaricately branching inflorescence, ebracteolate pedicels, and acti- nomorphic flowers with monomorphic anthers. It is endemic to the western parts of central and northern Namibia. Other species of Cyanella have several leaves, racemose inflorescences, bracteolate pedicels, zygomorphic flowers with dimor­phic anthers, and are endemic or near-endemic to the winter rainfall region in southwestern South Africa and southern Namibia. These differences are consistent with the recognition of the species as a distinct genus within the family. Phylogenetic analysis of plastid DNA sequences indicates that C. amboensis Schinz is sister to the other species of Cyanella, a relationship that also supports its independent generic status. The monotvpic genus Eremiolirion is according­ly erected to accommodate the species. Minor differences in flower colour and vegetative morphology in Cyanella alba L.f. are shown to correlate with the three disjunct groups of populations in which the species occurs, and these populations are recognized at the level of subspecies.
Two new <i>Plectranthus</i> species (Lamiaceae) and new distribution records from the Pondoland Centre of Plant Endemism, South Africa
Authors: Edwards T. J. 
Published: July 2015

Two newly discovered species of Plectranthus L'Hér. are described from the Pondoland Centre of Plant Endemism, on the eastern seaboard of South Africa. P. brevimentum and P. stylesii are exceedingly narrow endemics known only from their type localities. The known distribution ranges of two other narrow endemics of the region. P. emstii and P. praetermissus, are expanded with new distribution records.
Floristic composition of gold and uranium tailings dams, and adja­cent polluted areas, on South Africa’s deep-level mines
Authors: Weiersbye I. M. , Witkowski E. T. F. , Reichardt M. 
Published: July 2015

Gold and uranium tailings (‘slimes’) dams and the adjacent polluted soils in the deep-level mining regions of South Africa (Carletonville, Klerksdorp and Welkom) were surveyed for the frequency of occurrence of naturally colonizing, actively introduced and persisting plant species. Fifty-six tailings dams with a combined area of 5864 ha. and a similar area o f tail- ings-polluted soils, were surveyed between July 1996 and March 1997. During the survey, 376 plant species and subspecies were recorded from the dams and adjacent polluted soils, with an additional 8 6 records obtained between 1998 and 2003 (i.e. a total of 462 taxa: species and infraspecific species). Overall, the most commonly represented families were the Poaceae (107 species and subspecies), Asteraceae (81). Fabaceae (55) and Anacardiaceae (16). with other families represented by just one to 14 species. Only 60 species were common to all three regions, and of these 24 had been introduced during rehabilitation attempts. Most of the species found on tailings were persisters or natural colonizers (53-88%, depending on substrate), with the vast majority being indigenous and perennial taxa (76% and 85% respectively), with semi-woody to woody growth forms (6 6% being resprouters, forbs, shrubs and trees). Less than 4% of the naturally-colonizing taxa found during the survey had also been introduced by vegetation practitioners. The majority of introduced plants were alien herbaceous taxa. The number and frequency of annuals was only high on recently vegetated sites, whereas annuals were rarely present on old-vegetated and never-vegetated dams. This list includes a wide range of indigenous plant species that may be suitable for phytoremediation of tailings dams and polluted soils due to their apparent tolerance of acid mine drainage and salinity.
New species of Iridaceae from the Hantam-Roggeveld Centre of Endemism, and the Bokkeveld, Northern Cape, South Africa
Authors: Manning J. C. , Goldblatt P. 
Published: July 2015

Three new species of Iridaceae are described from the Bokkeveld and Roggeveld Escarpments. Ixia amethystina. a member of section Dichone, is endemic to the edge of the Roggeveld Escarpment. It shares an unusual, inclined spike that is nodding in bud with I. trifolia but is distinguished by its blackish purple (not yellow) anthers, narrower leaves 1.5-2.0 mm wide, medium-textured corm tunics that form a distinct neck at the base of the stem, and short style branches 2.0-2.5 mm long.Moraea marginata. another Roggeveld endemic, is a member of section Polvanthes and florally similar to M. fistulosa and M. monticola but differs in its linear, channelled leaves 5-7 mm wide, with unusual, thickened margins. Romulea singularis. from the edge of the Kobee River Valley in the Bokkeveld Mountains, is a member of section Ciliatae. It is unique in the genus in its narrowly funnel-shaped, mauve to purple flowers with slender perianth tube 10-11 mm long, and unusually long filaments, 8-9 mm long, inserted in the lower half of the tube.