Its area of ââ¬â¹Ã¢â¬â¹origin is the arid region that today is distributed between the north of Mexico and the south of the United States. It is estimated that the genus began to diversify 12 million years ago, which has achieved an enormous diversity of species, exceeding 300. The species of the genus are very similar in terms of their shape and growth. They form a large basal rosette of thick and fleshy leaves, in some cases of large size, which are placed in a spiral around a short stem in relation to their length, so they appear to be born directly from the ground. Generally they are armed with robust woody thorns and flattened in the margins, and a conical, solitary, finishing off the apex. A few species lack spines. Its growth is slow, and it ends with flowering, they are monocarpic. The plant develops a floral scape, taller than the leaves, and in the same year it flowers, fructifies, and dies. Most species develop a large number of basal suckers around the original rosette, forming thick colonies that develop and fructify.
圖片編號:
142085227
拍攝者:
Luland2013
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