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- W25571019 abstract "The vast Victorian glasshouse of the Royal Botanic Gardens at Kew, Lon don, shelters a unique nineteenth century collection of living cycads, a small group of cone-bearing, palm like plants of the tropics and subtrop ics. Included is one large specimen of Encephalartos woodii, which, like the passenger pigeon in the Cincinnati Zoo at the turn of this century, is the sole surviving member of its species. Unlike the pigeon, however, this plant still lives, and its offshoots have given rise to a clone of specimens which now are featured in botanical gardens the world over (Fig. 1). Un fortunately, all the world's speci mens of E. woodii are male, and al though reports of sex reversal in cycads are sometimes heard, such a reversal has never been reported in E. woodii. All but a few cycads are rare, and the existence in the wild of at least a third of these species is in grave jeopardy. Some are victims of collectors' mania, but most are en dangered, along with much of the natural vegetation of the tropics, by the growing demand for farmland, fuelwood, and lumber. Cycads can, therefore, justifiably claim our interest if only because of their rarity and uncertain future. A further and possibly more important consideration is their value to stu dents of plant evolution, for they appear but little changed from ances tors that flourished along with dino saurs and our own insectivorous an" @default.
- W25571019 created "2016-06-24" @default.
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- W25571019 date "1987-05-01" @default.
- W25571019 modified "2023-10-02" @default.
- W25571019 title "Cycads and the Origin of Insect Pollination" @default.
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