A cactus (plural: cacti, cactuses, or cactus[1]) is a member of the plant family Cactaceae, within the order Caryophyllales. The word cactus is derived through Latin from the Ancient Greek κάκτος (kaktos), a name originally used for a spiny plant whose identity is not certain. Cacti are native to the Americas, ranging from Patagonia in the south to parts of western Canada in the north. There is only one exception, Rhipsalis baccifera, which is also found in Africa and Sri Lanka.
Most cacti live in habitats which are subject to at least some degree of drought. Many live in extremely dry environments, even being found in theAtacama Desert, one of the driest places on earth. Cacti show many adaptations to conserve water. Most species of cacti have lost true leaves, retaining only spines, which are highly modified leaves. As well as defending against herbivores, spines reduce air flow close to the cactus and provide some shade, both of which help to prevent water loss. Cactus spines are produced from specialized structures called areoles, a kind of highly reduced branch; areoles are an identifying feature of cacti. As well as spines, areoles give rise to flowers, which are usually tubular and multi-petaled.
In the absence of leaves, enlarged stems carry out photosynthesis. Unlike many other succulents, the stem is the only part of most cacti where this vital process takes place. Cactus stems also store water, often being ribbed or fluted which allows them to expand and contract easily. Cacti come in a wide range of shapes and sizes. The tallest free-standing cactus is Pachycereus pringlei, with a maximum recorded height of 19.2 m (63 ft),[2] and the smallest is Blossfeldia liliputiana, only about 1 cm (0.4 in) in diameter at maturity.[3] The smaller cacti usually have globe-shaped stems, combining the highest possible volume with the lowest possible surface area. Many cacti have a short growing season and a long dormancy and are able to react quickly to any rainfall, helped by an extensive but relatively shallow root system. A fully grown saguaro (Carnegiea gigantea) is said to be able to absorb as much as 200 US gallons (760 l; 170 imp gal) of water during a rainstorm.[4]
the cactus belongs in the plant group.
A cactus plant branch :D
well a cactus plant has many parts like flowers
A cactus is a plant. It does not eat.
A cactus is a plant, a dicot.
The tip of a cactus is where growth occurs in a cactus plant. If this is badly damaged the plant may die or begin to grow elsewhere in the plant giving the plant an abnormal appearance.
Yes, cactus spines are living parts of the cactus plant. They owe their existence to growth buds on the plant's surface. From the growth buds also come a cactus plant's flowers.
No, the barrel cactus is a vascular plant.
The cactus root in the ground beneath the cactus plant.
cactus is thomy while a money plant is leafy.
No, a cactus is a plant, not an animal.
As a cactus is a form of a plant, it will require sunlight for photosynthesis and water to stop it from drying out and to help the cactus plant grow.