A new long-tubed subspecies of Pelargonium dipetalum (section Hoarea) (Geraniaceae) from the Albertinia-Swellendam area in Western Cape Province, South Africa
Bothalia - African Biodiversity & Conservation
| Field | Value | |
| Title | A new long-tubed subspecies of Pelargonium dipetalum (section Hoarea) (Geraniaceae) from the Albertinia-Swellendam area in Western Cape Province, South Africa | |
| Creator | le Roux, M. Marianne Manning, John C. | |
| Description | Background: Field studies confirmed that unusually long-tubed populations of Pelargonium dipetalum from between Swellendam and Albertinia, Western Cape Province, South Africa, are a distinct ecotype adapted to pollination by the long-proboscid fly, Prosoeca longipennis. The geographical and morphological isolation of these populations suggests that they are reproductively isolated from short-tubed populations, which are pollinated by bees.Objectives: To determine and describe the floral variation in P. dipetalum, with a view to recognising the long-tubed populations at some taxonomic level.Method: All available collections were measured and compared.Results: Populations of P. dipetalum were segregated into a short-tubed form with hypanthium 3 mm – 24 mm long and mostly pink petals that occurs from Betty’s Bay to Knysna, and a long-tubed form with the hypanthium 34 mm – 54 mm long and consistently white petals that is restricted to a small area east of Swellendam between Suurbraak and Albertinia. We described the long-tubed form as the new subspecies P. dipetalum subsp. stenosiphon.Conclusion: The new subspecies increases our understanding of the diversity in P. dipetalum and represents a new taxon of conservation concern. | |
| Publisher | AOSIS | |
| Date | 2014-12-08 | |
| Identifier | 10.4102/abc.v44i1.163 | |
| Source | Bothalia; Vol 44, No 1 (2014); 8 pages 2311-9284 0006-8241 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/163/1848
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/163/1849
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/163/1850
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/163/1811
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