Oh yeah, great plant @ctrl-alt-nwo and Pyrostegia venusta is a perennial, evergreen vine that comes from tropical and subtropical regions of South and Central America. It is widely spread in open fields, shrublands, edges of forests and coastal areas, and is often planted in gardens. It climbs or creeps at fast rate, with length range of around 12m.
It likes slightly acidic soil but tolerate neutral, slightly alkaline or saline conditions. It grows and flowers best in full sunlight. It doesn't flower well in hot and humid conditions, but it is all covered in bloom for long time when season is dry and temperatures are cooler. If your plants don't produce many flowers, pruning might help. It is also important not to overfeed Pyrostegia. In very fertile and moist soil it will grow rapidly, but you won't see many flowers on it, if any, even during the peak of it's flowering season. It copes well with extreme heat and can survive slight frost. In regions with cold winters it can be grown as a pot plant.
RE: Polygala - colour me Mauve