3520 x 2720 px | 29,8 x 23 cm | 11,7 x 9,1 inches | 300dpi
Aufnahmedatum:
2009
Ort:
Joshua tree National Park, California, usa
Weitere Informationen:
Joshua trees are fast growers for the desert; new seedlings may grow at an average rate of 7.6 cm (3.0 in) per year in their first ten years, then only about 3.8 cm (1.5 in) per year.[15] The trunk consists of thousands of small fibers and lacks annual growth rings, making it difficult to determine the tree's age. This tree has a top-heavy branch system, but also what has been described as a "deep and extensive" root system, with roots reaching up to 11 m (36 ft).[2] If it survives the rigors of the desert, it can live for hundreds of years; some specimens survive a thousand years. The tallest trees reach about 15 m (49 ft). New plants can grow from seed, but in some populations, new stems grow from underground rhizomes that spread out around the parent tree.
