A vigorous, semi-evergreen climbing vine from subtropical southern South America, grown for its intricate, unmistakable flowers — white-to-pale-blue petals beneath a crown of blue-and-purple-banded filaments. POWO (Kew) and Flora e Funga do Brasil record it as native to southern Brazil, Argentina, Uruguay and Paraguay. It is by far the hardiest commonly-grown passionflower, root-hardy to roughly zone 6b/7 and resprouting after a freeze, and it climbs fast by tendrils to clothe a fence, arch or trellis. The egg-shaped orange fruit that follows is edible but bland and insipid — it is NOT the commercial passion fruit — and the leaves and unripe fruit contain cyanogenic compounds, so only the ripe pulp is safe to eat. Its vigour is a warning as much as a virtue: in mild climates it suckers and self-seeds and can become weedy or invasive, so give it room and curb it.