Question: Which is native to more continents, Thuja or Lycium?
Context: Thuja koraiensis, also called Korean arborvitae, is a species of "Thuja", native to Korea and the extreme northeast of China (Changbaishan).  Its current status is poorly known; the small population in China is protected in the Changbaishan Nature Reserve, as is the small population in Soraksan Nature Reserve in northern South Korea, but most of the species' range in North Korea is unprotected and threatened by habitat loss. Thuja standishii (Japanese Thuja; nezuko, kurobe) is a species of thuja, an evergreen coniferous tree in the cypress family Cupressaceae.  It is native to southern Japan, where it occurs on the islands of Honshū and Shikoku.  It is a medium-sized tree, reaching 20–35 m tall and with a trunk up to 1 m diameter. Thuja ( ) is a genus of coniferous trees in the Cupressaceae (cypress family).  There are five species in the genus, two native to North America and three native to eastern Asia.  The genus is monophyletic and sister to "Thujopsis".  Members are commonly known as arborvitaes, (from Latin for "tree of life") thujas or cedars. Thuja sutchuenensis (Sichuan thuja) is a species of thuja, an evergreen coniferous tree in the cypress family Cupressaceae.  It is native to China, where it is an endangered local endemic in Chengkou County (Chongqing Municipality, formerly part of Sichuan province), on the southern slope of the Daba Mountains. Goji, goji berry, or wolfberry () is the fruit of either the "Lycium barbarum" or "Lycium chinense", two closely related species of boxthorn in the nightshade family, Solanaceae.  The family also includes the potato, tomato, eggplant, belladonna, chili pepper, and tobacco.  The two species are native to Asia. Thuja plicata, commonly called western or Pacific redcedar, giant or western arborvitae, giant cedar, or shinglewood, is a species of "Thuja", an evergreen coniferous tree in the cypress family Cupressaceae native to western North America.  It is not a true cedar of the genus "Cedrus". Platycladus is a distinct genus of evergreen coniferous tree in the cypress family Cupressaceae, containing only one species, Platycladus orientalis, also known as Chinese thuja, Oriental arborvitae, Chinese arborvitae, biota or oriental thuja.  It is native to northwestern China, Korea, and the Russian Far East (Amur + Khabarovsk).  It is also now naturalised as an introduced species elsewhere in Asia: eastward to Japan; southward to northern India; and westward to northern Iran. Tetraclinis (also called arar, araar or Sictus tree) is a genus of evergreen coniferous trees in the cypress family Cupressaceae, containing only one species, Tetraclinis articulata, also known as Thuja articulata, sandarac, sandarac tree or Barbary thuja, endemic to the western Mediterranean region.  It is native to northwestern Africa in the Atlas Mountains of Morocco, Algeria, and Tunisia, with two small outlying populations on Malta, and near Cartagena in southeast Spain.  It grows at relatively low altitudes in a hot, dry subtropical Mediterranean climate. Lycium is a genus of flowering plants in the nightshade family, Solanaceae.  The genus has a disjunct distribution around the globe, with species occurring on most continents in temperate and subtropical regions.  South America has the most species, followed by North America and southern Africa.  There are several scattered across Europe and Asia, and one is native to Australia. Lycium barbarum () is one of two species of boxthorn in the family Solanaceae from which the goji berry or wolfberry is harvested, the other being "Lycium chinense" ().  It is native to southeastern Europe and Asia.
Answer: Lycium