Niels Bohr - Biographical. Niels Henrik David Bohr was born in Copenhagen on October 7, 1885, as the son of Christian Bohr, Professor of Physiology at Copenhagen University, and his wife Ellen, nÃ©e Adler.
Opuntia is a large genus of plants native to North America and South America. All have succulent stems, some of them becoming woody with age. Stems may be cylindrical or flattened pads. Tiny, succulent leaves may be present on the newest growth (see photo below.) Most species are spiny.
(return to top) There are 12 varieties of fruiting Opuntia cactus. Opuntia engelmannii (Englemannâs Prickly Pear) is native to the Sonoran Desert, and likely can found very near your house. Opuntia ficus indica is a larger, cultivated prickly pear that is often thornless and therefore easily harvested. Englemannâs Prickly Pear has pinkish flower buds that open to yellow flowers.