Authors
Patricia Jaramillo Díaz Curator, CDF Hebarium, Biodiversity Assessment & Ecosystems Restoration, Charles Darwin Foundation, Galapagos, Ecuador.
Anne Guézou Botanist, Baseline Studies & Ecosystems Restoration, Charles Darwin Foundation, Galapagos, Ecuador.
André Mauchamp Volunteer Botanist, Charles Darwin Foundation, Galapagos, Ecuador.
Alan Tye Invasive Species Officer, South Pacific Regional Environment Programme (SPREP), Samoa.
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Cycads
Cycas circilalis L.
Cycads are a unique group of vascular plants that probably originated in the Carboniferous belong to the gymnosperms. Their stem is unbranched, partially or totally immersed in the soil, or forming a tall trunk. They have pinnate or bipinnate leaves with a thick, waxy cuticle.
Like the ferns, the leaves of cycads are initially coiled, when expanded their leaves often resemble those of palm trees.
The organization of their reproductive structures is often taxonomically important. The leaves that bear the megaspores and eventually the female gametophytes are organized within a single cone vaguely resembling a pineapple. Male cones are smaller but similar in structure with scales that bear the pollen sacs.
Authors: Patricia Jaramillo Díaz, Anne Guézou, André Mauchamp, Alan Tye.
Other Contributors: Henning Adsersen, Ivan Aldáz, Chris Buddenhagen, Baltasar Cabezudo, Susana Chamorro, César Gómez-Campos †, Jacinto Gordillo, Ana Mireya Guerrero, Ole Hamman, Syuzo Itow, Heinke Jäger, Jonas E. Lawesson, Simon Lægaard, Conley McMullen, Duncan M. Porter, Paola Pozo, Alan Stewart, Maria M. Trigo, Alan Tye, Daniel Weber, Ira L. Wiggins.
Names of taxa included: 2.
Origin of the taxa included: 2 cultivated.
Cycadophyta Species Checklist
Domain Eukaryota
Kingdom Plantae
Division Cycadophyta
Class Cycadopsida
Order Cycadales
Family Cycadaceae
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