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Among the most spectacular are forests of pure Araucaria Araucaria araucana, the hardiest of the genus, is a large, bizarre-looking evergreen, 60-70ft. tall and 30 to 35 feet wide, though the tallest specimens in its native haunts have been measured at over 150 ft. It forms a loose, symmetrical, see-through crown, pyramidal in youth, eventually with a rounded or flattish top. The scale-like leaves are dark green, stiff, sharp-pointed and densely arranged on upwardly-sweeping branches, looking more reptilian than coniferous in character. Because of this it comes to know surprise to most people that this species is estimated to be around 60 million years old, based upon fossil record known today.
Preferring well-drained, volcanic soil, this species is surprisingly tolerant of many soil types. It is very tolerant of maritime exposures, salt-laden winds, and thrives in cool, mild climates. It dislikes hot-dry soils and atmospheric pollution.
Araucaria is a genus of coniferous trees. There are 19 species in the genus, with a highly disjunct distribution in New Caledonia (where 13 species are endemic), Norfolk Island, eastern Australia, New Guinea, Argentina, Chile, and southern Brazil.
Fossil evidence indicates that ancestral araucaria forests resembling the present-day Monkey Puzzle date back to the age of dinosaurs.
Some of the species are relatively common in cultivation because of their distinctive, formal symmetrical growth habit. Several species are economically important for timber production and the edible seeds.
It is a prickly, glabrous, branching herb with yellow juice and showy yellow flowers. The plants is toxic to animals and cattle avoid grazing this plant.
Aspalathus, the genus to which the Rooibos Tea plant belongs, is endemic to South Africa.
Species of Aspalathus has never been developed into garden plants, although many attractive species show great potential as garden plants.
Asparagus aethiopicus has been confused with Asparagus densiflorus, now regarded as a separate species, so that information about A. aethiopicus will often be found under the name A. densiflorus.