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Flowering plants in the order Dioscoreales recorded from South Africa
The
Dioscoreales are an
order of
monocotyledonous
flowering plants , Within the monocots Dioscoreales are grouped in the
lilioid monocots where they are in a
sister group relationship with the
Pandanales . As currently
circumscribed by
phylogenetic analysis using combined
morphology and
molecular methods, Dioscreales contains many reticulate veined
vines in Dioscoraceae, it also includes the
myco-heterotrophic
Burmanniaceae and the
autotrophic
Nartheciaceae . The order consists of three families, 22
genera and about 850
species . The
anthophytes are a grouping of plant taxa bearing flower-like reproductive structures. They were formerly thought to be a
clade comprising plants bearing flower-like structures. The group contained the
angiosperms - the extant flowering plants, such as
roses and
grasses - as well as the
Gnetales and the extinct
Bennettitales .
[1]
23,420 species of vascular plant have been recorded in South Africa, making it the sixth most species-rich country in the world and the most species-rich country on the African continent. Of these, 153 species are considered to be threatened.
[2] Nine
biomes have been described in South Africa:
Fynbos , Succulent
Karoo ,
desert ,
Nama Karoo ,
grassland ,
savanna ,
Albany thickets , the
Indian Ocean coastal belt , and
forests .
[3]
The 2018
South African National Biodiversity Institute 's
National Biodiversity Assessment plant checklist lists 35,130 taxa in the phyla
Anthocerotophyta (hornworts (6)),
Anthophyta (flowering plants (33534)),
Bryophyta (mosses (685)),
Cycadophyta (cycads (42)),
Lycopodiophyta (Lycophytes(45)),
Marchantiophyta (liverworts (376)),
Pinophyta (conifers (33)), and
Pteridophyta (cryptogams (408)).
[4]
Three
families are represented in the literature. Listed
taxa include
species ,
subspecies ,
varieties , and
forms as recorded, some of which have subsequently been allocated to other taxa as
synonyms , in which cases the accepted taxon is appended to the listing. Multiple entries under alternative names reflect
taxonomic revision over time.
Burmanniaceae
Family:
Burmanniaceae ,
[4]
Burmannia
Genus
Burmannia :
[4]
Dioscoreaceae
Family:
Dioscoreaceae ,
[4]
Dioscorea
Genus
Dioscorea :
[4]
Dioscorea brownii Schinz, endemic
Dioscorea buchananii Benth. subsp. undatiloba (Baker) Wilkin, endemic
Dioscorea burchellii Baker, endemic
Dioscorea cotinifolia Kunth, indigenous
Dioscorea crinita Hook.f. accepted as
Dioscorea quartiniana A.Rich. present
Dioscorea digitaria R.Knuth, accepted as
Dioscorea multiloba Kunth, indigenous
Dioscorea diversifolia Kunth, accepted as
Dioscorea multiloba Kunth, indigenous
Dioscorea dregeana (Kunth) T.Durand & Schinz, indigenous
Dioscorea elephantipes (L'Her.) Engl. endemic
Dioscorea hemicrypta Burkill, indigenous
Dioscorea junodii Burtt Davy, accepted as
Dioscorea buchananii Benth. subsp. undatiloba (Baker) Wilkin, indigenous
Dioscorea microcuspis Baker, accepted as
Dioscorea retusa Mast. present
Dioscorea multiloba Kunth, indigenous
Dioscorea mundii Baker, endemic
Dioscorea natalensis R.Knuth, accepted as
Dioscorea multiloba Kunth, indigenous
Dioscorea quartiniana A.Rich. indigenous
Dioscorea retusa Mast. indigenous
Dioscorea rupicola Kunth, endemic
Dioscorea stipulosa Uline ex R.Knuth, endemic
Dioscorea strydomiana Wilkin, indigenous
Dioscorea sylvatica Eckl. indigenous
Dioscorea sylvatica Eckl. var. brevipes (Burtt Davy) Burkill, indigenous
Dioscorea sylvatica Eckl. var. multiflora (Marloth) Burkill, endemic
Dioscorea sylvatica Eckl. var. paniculata (Dummer) Burkill, endemic
Dioscorea sylvatica Eckl. var. rehmannii (Baker) Burkill, endemic
Dioscorea sylvatica Eckl. var. sylvatica , indigenous
Dioscorea tysonii Baker, accepted as
Dioscorea retusa Mast.
Dioscorea undatiloba Baker, accepted as
Dioscorea buchananii Benth. subsp. undatiloba (Baker) Wilkin, endemic
Testudinaria
Genus
Testudinaria :
[4]
Nartheciaceae
Family:
Nartheciaceae ,
[4]
Aletris
Genus
Aletris :
[4]
References
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