Al-ais is an Arabic word that describes swirling trees whose roots are overlap and intertwine with each other. These trees have entangled stems and branches beyond identification, like the overlapping and entanglement of jujube (Ziziphus spina-christi), Assalam (an Arabic name for acacia ehrenbergiana or Vachellia flava), Al-awsaj (an Arabic word that means Chinese wolfberry or Lycium barbarum) and Assamor (Umbrella Thorn Tree).