golden barrel cactus
Plants solitary, globose to short cylindrical, light green, 20130 cm (7.9-51 in) high, 40-80 cm (16-31 in) in diameter. Ribs 21-37, narrow. Spines golden yellow when young, becoming dark with age. Central spines 3-4, straight, erect, to 5 cm (2 in) long. Radial spines 8-10, somewhat divergent, to 3 cm (1.2 in) long. Flowers often never fully opening, yellow, 4-6 cm (1.6-2.4 in) long, 3-5 cm (1.2-2 in) in diameter. Fruits round to somewhat oblong, greenish, 12-20 mm (0.50.8 in) long, covered with whitish wool. Seeds shiny dark brown, smooth. Distribution: a restricted area, often on steep hillsides or cliffs, in Queretaro, Mexico. Echinocactus grusonii is almost extinct in the wild because of the construction of a dam. This species is possibly the most widely propagated of all cacti, however, and exists in almost all public and private collections as well as in many window planters.
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