Cactus
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A cactus is a member of the plant family Cactaceae, a family of the order Caryophyllales comprising about 127 genera with some 1,750 known species. The word cactus derives, through Latin, from the Anc
Various Cactaceae
Cultivated cacti in the Singapore Botanic Gardens
Many species of cactus have long, sharp spines, like this Opuntia.
Ferocactus species, a cactoid, in its native Arizona habitat
Succulent plant
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In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions.
Cactus
…Atacama Desert, one of the driest places on Earth. Because of this, cacti show many adaptations to conserve water. For example, almost all cacti are succulents, meaning they have thickened, fleshy organs adapted to store water. Most species of cacti have lost true leaves, retaining only spines, which are highly…
Succulent plants have thickened stems or leaves, such as this Aloe.
The center rosette of Aloe polyphylla
A collection of succulent plants, including cacti, from the Jardin botanique d'Èze, France
Succulents, such as these Adromischus marianae, Crassula deceptor and Conophytum, share an affinity for arid, fast-draining soils, often growing directly on rocks