Harveya purpurea explained

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.^{[1] [2]} 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.^[3]

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.^{[4] [5]}

External links

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Notes and References

1. https://plants.jstor.org/compilation/harveya.purpurea?searchUri={{full citation needed|date=December 2017}}
2. http://redlist.sanbi.org/species.php?species=1072-17{{full citation needed|date=December 2017}}
3. 'Parasitic flowering plants' - Henning Heide-Jørgensen
4. 10.1093/oxfordjournals.molbev.a025853 . 9787431 . 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 . 1998 . Wolfe . A. D . Depamphilis . C. W . free .
5. 10.3732/ajb.92.9.1575 . 21646175 . The evolution and expression of RBCL in holoparasitic sister-genera Harveya and Hyobanche (Orobanchaceae) . American Journal of Botany . 92 . 9 . 1575–85 . 2005 . Randle . C. P . Wolfe . A. D . free .