here are few differences between per portulaca and f1 annual portulaca
1.per portulaca open only in bright sunlight butf1 varieties open in minimum sunlight available
2.per portulaca has more foliage than flowers but f1 is compact plant with a large number of flowers.
3.annual varieties flower remain open for almost 6 to 8 hours but per portulaca's flower life is very short almost 3 to 4 hours.
4.per portulaca is a vigorous grower and spreads very fast even cuttings are very easy to grow but annual portulaca is a slow grower plant and remains lanky in hot weather.
5. annual portulaca performs seed pods but i have never seen seed pods on per portulaca.
6.annual portulaca comes with number of colors but colors in per portulaca are limited but they are increasing now.
7.annual portulaca f1 sundial has big flowers in size as compared with per portulaca.
8.per portulaca survives in moonsoon rains but annual portulaca dies rapidly in rains as umar khan sb described.
these differences are according to my little knowledge remember it i am not an expert gardener.
