Carnegiea gigantea wani nau'in cactus ne wanda kuma aka sani da cactus Saguaro. Ya fito ne daga Hamadar Sonoran a kudu maso yammacin Amurka da arewa maso yammacin Mexico. Saguaro cactus an san shi da tsayi, siffar columnar, tare da rassan da ke fitowa daga tarnaƙi da kuma gungu na spines a saman. Hakanan an santa don jinkirin girma, tare da wasu samfuran suna ɗaukar shekaru 75 don isa tsayin tsayin ƙafa 40 zuwa 60. Cactus Saguaro wata muhimmiyar alama ce ta Kudu maso Yamma na Amurka kuma ana kiyaye shi a ƙarƙashin dokokin jihohi da na tarayya.