Cycadales


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Cycadales: Coniferales

Cycadales

[‚sī·kə′dā·lēz]
(botany)
An ancient order of plants in the class Cycadopsida characterized by tuberous or columnar stems that bear a crown of large, usually pinnate leaves.
Mentioned in ?
References in periodicals archive ?
Las primeras evidencias fosiles de Cycadales datan del Carbonifero, especificamente del Pensilvaniano superior (Stewart & Rothwell, 1993; Taylor & Taylor, 1993; Norstog & NichoUs, 1997).
El orden Cycadales consta de tres familias: Cycadaceae, con el unico genero Cycas, ampliamente distribuido en S Japon, Archipielago Malayo, SE Asia, Filipinas, Indonesia, Nueva Guinea, N Australia, India, Sri Lanka, Madagascar y posiblemente la costa oriental de Africa; Stangeriaceae, con los generos Bowenia, de N.
Se ha planteado que estos insectos polinizadores han coevolucionado con la especificidad en la relacion de ciertos coleopteros con plantas del orden Cycadales (Crowson, 1991; Oberprieler, 1995a, b) y con la tolerancia que han desarrollado estos insectos a los com puestos toxicos de estas plantas (Sacks, 1996; Schneider et al.
Herbivoria en una gimnosperma endemica de Colombia, Zamia encephalartoides (Zamiaceae) por parte de Eumaeus (Lepidoptera: Lycaenidae)
Chamberlain (1935, page 103) states that the ovule of the Cycadales has a single, 'massive integument' and in Fig.
Origin of the coleorhiza in cycad seedlings and its structural homology with that of the Poaceae
The Cycadales and Bennettitales have been distinguished on the
clearly demonstrate the distant relationship between the Cycadales and
1985b; Doyle & Donoghue, 1987), and the Cycadales occur as a more
Systematics, ontogeny, and phylogenetic implications of exceptional anatomically preserved cycadophyte leaves from the Middle Jurassic of Bearreraig Bay, Skye, northwest Scotland
The fossil record of anatomically preserved stems of Cycadales is
2001) assignable to the Cycadales reinforces the importance this group
inverted omega pattern of other Cycadales is absent.
Two new petrified cycad stems, Brunoa gen. nov. and Worsdellia gen. nov., from the Cretaceous of patagonia (Bajo de Santa Rosa, Rio Negro Province), Argentina
la composition des sporodermes chez les Cycadales (Prespermaphytes).
Pollen morphology of the Cycadales with special reference to the
Cycads of Colombia

Encyclopedia browser ?
Full browser ?