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Mexican Boulder (Calibanus hookeri [syn. Dasylirion hookeri]), an evergreen perennial native to northern central Mexico. Closely allied to Nolina, it has long, narrow, blue-green leaves and sprays of small pink flowers followed on female plants by purple-brown fruits, but the most distinctive feature is the large thickened root-cum-stem, or caudex. This can be up to 90cm wide on mature plants and is a reserve for times of drought. calibanus-2620htm'>Calibanus.
![Mexican Boulder (<i>Calibanus hookeri [syn. Dasylirion hookeri]), an evergreen perennial native to northern central Mexico. Closely allied to Nolina, it has long, narrow, blue-green leaves and sprays of small pink flowers followed on female plants by purple-brown fruits, but the most distinctive feature is the large thickened root-cum-stem, or caudex. This can be up to 90cm wide on mature plants and is a reserve for times of drought. calibanus-2620htm'>Calibanus.](./data/media/1/CFGi859.jpg "Mexican Boulder (<i>Calibanus hookeri [syn. Dasylirion hookeri]), an evergreen perennial native to northern central Mexico. Closely allied to Nolina, it has long, narrow, blue-green leaves and sprays of small pink flowers followed on female plants by purple-brown fruits, but the most distinctive feature is the large thickened root-cum-stem, or caudex. This can be up to 90cm wide on mature plants and is a reserve for times of drought. calibanus-2620htm'>Calibanus.")