Florence Du Cane, The Flowers and Gardens of Madeira (1909)
“ It would be impossible to enumerate all the host of other plants the garden contains—creepers, shrubs, flowering trees, besides roses, begonias, geraniums, heliotropes, in an almost endless list—while the cliffs have remained a natural rock-garden. In the clefts of the rocks giant agaves occasionally throw up their great flower-heads fifteen feet or more in height, and then the plant, as if exhausted by the supreme effort in the climax of its existence, dies; but it is quickly replaced by hundreds of others, as the seed of the monster flower has found fresh ground in every nook and cranny. ”
