Yet the noble Cycadaceae and screw-pines, thirty or forty feet high, the elegant tree ferns, the lofty palms, and the variety of beautiful and curious plants which everywhere meet the eye, attest the warmth and moisture of the tropics, and the fertility of the soil.    From Wordnik.com.  [The Malay Archipelago] Reference

Cycadaceae, supposed power to withstand excess of CO2.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

Cycadaceae and screw-pines, thirty or forty feet high, the elegant tree ferns, the lofty palms, and the variety of beautiful and curious plants which everywhere meet the eye, attest the warmth and moisture of the tropics, and the fertility of the soil.    From Wordnik.com.  [The Malay Archipelago, the land of the orang-utan and the bird of paradise; a narrative of travel, with studies of man and nature — Volume 2] Reference

The allied family of gymnosperms, the Cycadaceae, first appear in the Carboniferous era, but very scantily; are most abundant in the Oolite, from which formation 116 species are known, and then steadily diminish to the Tertiary, although there are seventy-five living species.    From Wordnik.com.  [Darwinism (1889)] Reference