I came across this vine in Lalbagh, Bangalore climbing up the nursery mesh with Red flowers. Red Passion Flower is very similar to the Purple Passion flower and belongs to the same family Pssifloraceae. The botanical name is Passiflora coccinea.
Red Passion Flower is native of South America and is widely grown in other tropical regions. They are planted on hedges and fences. Passion fruit obtained from this plant is ovoid, about 5 to 6 cm in diameter.
This vine can be propagated by seeds.