Among the Cycadofilices a series of stages is found leading from the primitive fern-protostele to the type of siphonostele characteristic of the Cycads which agrees in essentials in all the Spermophytes. [Please select]
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For another two hours I limped forward with pain and grief--by now I was leaning on Hans' shoulder--up an endless, uncultivated rise clothed with euphorbias and fern-like cycads. [Please select]
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In the place of the cycads, sequoias, and strange conifers of the Mesozoic, the plant names that now appear in the lists of fossils include birch, beech, holly, tulip trees, ivy, sweet gum, bread-fruit trees. [Please select]
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