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a3be78a333c31340907bf812a7c4977a1
2009-08-20 13:25:58

Scientists have worked out how some species of desert cactus manage to grow on nothing but bare rock, BBC News reported. They say the plants have evolved a symbiotic relationship with rock-dissolving bacteria, which they allow to grow in their roots. The cacti even pass this on to future generations. Dr. Yoav Bashan, a biologist at the Northwestern Center for Biological Research in La Paz, Mexico, said they were working in the desert when they observed that many individual cacti grew on sheer...


Latest Pachycereus Reference Libraries

34_a54f854bd90d707a508d9a0388416234
2005-06-02 11:42:14

A cactus (plural, cacti or cactuses) is a type of succulent plant belonging to the dicotyledonous flowering plant family, Cactaceae. The Cactaceae has (depending upon the authority) between 24 and 220 genera, with around 90 genera being the most widely accepted count, and with anywhere from 1,500 to 1,800 species. Cacti are recognized natives of the Americas, mostly in desert areas. Some are also rainforest epiphytes, growing on tree branches where, despite the high rainfall, water drains off...

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Word of the Day
ramage
  • Boughs or branches.
  • Warbling of birds in trees.
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