Harveya purpurea is an annual herb with large, showy flowers and scale-like leaves, parasitic on the roots of shrubs and trees, endemic to South Africa in the Eastern and Western Cape.[2][3] It occurs from the Cederberg to the Cape Peninsula, and along the coastal belt to Grahamstown in the Eastern Cape, mainly among fynbos, on stony slopes and sandy flats.[4]
| Harveya purpurea | |
|---|---|
| |
| |
| Plate from Hooker’s Icones Plantarum | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Orobanchaceae |
| Genus: | Harveya |
| Species: | H. purpurea
|
| Binomial name | |
| Harveya purpurea | |
| Synonyms | |
| |
Harveya species are native to Africa, Madagascar, and Yemen. This species is holoparasitic, that is, entirely nonphotosynthetic, with a preference for members of the Campanulaceae such as Roella and Wahlenbergia. The disabling of the photosynthesis gene has happened independently several times in Scrophulariales.[5][6]
References
edit- ^ http://www.theplantlist.org/tpl1.1/record/tro-29203638[full citation needed]
- ^ https://plants.jstor.org/compilation/harveya.purpurea?searchUri=[full citation needed]
- ^ http://redlist.sanbi.org/species.php?species=1072-17[full citation needed]
- ^ 'Parasitic flowering plants' - Henning Heide-Jørgensen
- ^ Wolfe, A. D; Depamphilis, C. W (1998). "The effect of relaxed functional constraints on the photosynthetic gene rbcL in photosynthetic and nonphotosynthetic parasitic plants". Molecular Biology and Evolution. 15 (10): 1243–58. doi:10.1093/oxfordjournals.molbev.a025853. PMID 9787431.
- ^ Randle, C. P; Wolfe, A. D (2005). "The evolution and expression of RBCL in holoparasitic sister-genera Harveya and Hyobanche (Orobanchaceae)". American Journal of Botany. 92 (9): 1575–85. doi:10.3732/ajb.92.9.1575. PMID 21646175.