I think pomegranate can survive both low and high temperatures?
Also rough lemon takes frost and 30C + but needs irrigation.
Mulberry also but needs irrigation too.
Hmm is a tough combo for low and high temperature tolerance as well as draught resistance
Yes - exactly, pomgranates and mulberries are well adopted. Mulberries have good resistance to drought too, but not for extreme conditions. But are one of the best fruits I know and very producing trees.
Some intresting plants that surviveboth Siberian frosts and the hot desert Sun are Nitraria species. They are Halophytes, butin difference to Calligonum could be considered a real high quality fruit. I would prefer them to Lycium for example.
They are tasty both, fresh and as a dried fruit and give also a nice violet colour (for example for ice-creams).
As Halophytes they are quite specific plants that need specific conditions, but which other fruiting plant will survive such hard conditions?
The main difficulty with Nitraria as with some Lycium, that they are a bit thorny, and collection isn't that easy.
Nitraria bushes are low growing plants...
Related to Nitraria is Malacocarpus. I don't have experience with Malacocarpus - and wanted to offer seeds here, but seems that my source of seeds wasn't a good one.I am still in search to get right and good quality seeds of this plant to grow and spread this rare plant.
Malacocarpus crithmifolius (previously Peganum crithmifolium) is also a low growing shrub. It is very rare and is know of small locations from Turkmenistan, Iran, Afghanistan and Uzbekistan.
Although it seems a wide range, in reality it is known of only 2-4 locations in each country. This plant is very rare and seems difficult to reproduce (what is not possible to say for the related genus Peganum).
I havn't tasted the fruit, but it is described as tasty and good quality fruit.
It can be found on both, salty and rocky soils. The plant is also very decorative. The plant produces red berries.
Good pictures aren't unfortunately available on the internet, as the plant is really very rare