A Araucariaceae come the super ancient personal of conifers. It achieved maximal diversity in the Jurassic and Cretaceous periods, when it existed well-nigh worldwide. At a prevent of a Cretaceous period, after dinosaurs became out, and so as well did the Araucariaceae in the northern hemisphere.

There are ternion genera using 41 mintage alive in todays world, Agathis, Araucaria and Wollemia, all from either a Antarctic flora and distributed largely in the southern hemisphere. By far a greatest diversity is within New Caledonia (18 mintage), by having others inside southern South America, New Zealand, Australia and Malesia, where Agathis extends a short few feet away into the northern hemisphere, reaching 18°N in the Philippines. Everthing come evergreen trees, typically by having one stout trunk & super regular whorls of branches, returning the babies the formal appearance. Many may be popular decorative trees around gardens in semitropic regions, & occasionally come as well crucial timber trees, producing wood of high quality. Many own edible seeds similar to pine nuts, and others green groceries worthful resin and amber. In the forests where they occur, it is ordinarily dominant trees, typically a big metal money in a outdoors; the largest is Araucaria hunsteinii, reported to 89 m tall around New Guinea, with many more metal money reaching 50-65 m tall.

A petrified wood of the famous Petrified Forest east of Holbrook, Arizona are fossil Araucariaceae. When you took a Upper (Late) Triassic a vicinity was dampish & modest. A trees washed from either around which it grew in seasonal overflowing & accumulated in sandlike delta mudflats, in which it were buried by silt & sporadically by shells of volcanic ash which mineralized a wood. A fossil trees belong typically to triplet metal money of Araucariaceae, a usual of the babies existence Araucarioxylon arizonicum. Occasionally of the segements of trunk represent elephantine trees that come forecasted to keep close at hand been all over Fifty meters tall after it were alive.

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