Before, I wrote as ‘Please help me in the identification of this climber shrub’ but I knew the answer. Thanks to my friend Saharan Shephard who replied to my query and provided the name with some details.
The shrub has weak stems (mostly many) and climbs on other trees. I found it in Alain Abu Dhabi. It is in the flowering stage now. It has small simple leaves, thorny stalks, and red cherries (though I found one). According to Wikipedia, it is found throughout the Arabian Peninsula.
Arabian boxthorn is a spreading, very spiny shrub growing 1 – 3 meters tall, exceptionally becoming a small tree up to 4.5 meters tall. The plant is harvested from the wild for local use as food and medicine. It is also grown as a hedge. https://arkbiodiv.com/2022/01/23/native-shrubs-are-the-best-for-the-municipal-and-homes-beautifications/
Some more details about the flora Lycium shawii
Lycium shawii is highly adapted to desert ecosystems. The thin-leaved, rigid bush grows up to 3 meters (9.8 feet) high, with a lot of branches and alternating spines that vary in size, and grow along the branches and on their tips. The leaves narrow towards their base. It produces small whitish-pink or purple flowers from Sep to Apr. The fruit is small red pea-sized (seedy berries), edible, and used as herbal medicine as well. The flora like to be the neighbor of Acacia tortillas and Prosopis cineraria to climb and thrive better.
Is it native or exotic?
Yes; It is native to the desert ecosystem of the Arabian Peninsula and some parts of Africa.
It can be used as hedging, fencing, and live wall, my exceptional idea of replacing exotic plants with native flora. https://arkbiodiv.com/2022/01/23/native-shrubs-are-the-best-for-the-municipal-and-homes-beautifications/amp/