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Cacti are adapted to live in very dry environments, including the Atacama Desert, one of the driest places on Earth. Because of this, cacti show many adaptations to conserve water. Because of this, cacti show many adaptations to conserve water.
Individual stomatal guard cells and medulla cells can live and function for as long as 150 years, [14] possibly the longest living of all cells, except possibly nerve cells in some tortoises. [citation needed] As a cactus, it uses crassulacean acid metabolism photosynthesis, which confers high levels of water-use efficiency.
The ribs are numerous and pronounced, and the spines are long and can range in color from yellow to tan to red, depending on the age of the plant and the species. Flowers appear at the top of the plant only after many years. The barrel cactus can live to be over 100 years old.
The Saguaro cactus is still present, but less frequently than in the Arizona uplands, and is smaller in this ecotone. [2]: 7 It is almost entirely absent on the California side of the Colorado River. [2]: 7 Desert Holly (Atriplex hymenelytra) can tolerate even the hottest and driest sites. [9]: 271
The desert contains a variety of unique endemic plants and animals, notably, the saguaro (Carnegiea gigantea) and organ pipe cactus (Stenocereus thurberi). The Sonoran Desert is clearly distinct from nearby deserts (e.g., the Great Basin , Mojave , and Chihuahuan deserts ) because it provides subtropical warmth in winter and two seasons of ...
Saguaros, which flourish in both districts of the park, grow at an exceptionally slow rate. The first arm of a saguaro typically appears when the cactus is between 50 and 70 years old though it may be closer to 100 years in places where precipitation is very low. Saguaros may live as long as 200 years and are considered mature at about age 125 ...
Stenocereus thurberi, the organ pipe cactus, [3] is a species of cactus native to Mexico and the United States. The species is found in rocky desert. Two subspecies are recognized based on their distribution and height. The Organ Pipe Cactus National Monument is named for the species. Cacti are minimally adapted to particular thermal niches ...
Echinocereus triglochidiatus is a species of hedgehog cactus known by several common names, including kingcup cactus, claret cup cactus, red-flowered hedgehog cactus and Mojave mound cactus. This cactus is native to the southwestern United States and northern Mexico, where it is a resident of varied habitats from low desert to rocky slopes ...