Angallis arvensis (Scarlet pimpernel)
(Added to iSpot on 27th November 2012)
An exotic annual from Eurasia. It was introduced as a contaminant of crop seeds by European settlers.
Location: Rooikrans Conservation Area
This iSpot observation cited by Wikipedia
http://en.wikipedia.org/wiki/Anagallis_arvensis#cite_note-3
-- Beetledude