An introduction to gymnosperms, cycas, and cycadales

Cycads with special reference to the southern African species

Cycas and the Cycadales

Proceedings of the Third International Conference on Cycad Biology

On fossil cycadean stems from the secondary rocks of Britain

Cycads of the world

Petrified wood

On the cuticles of some recent and fossil cycadean fronds

The Cycads

Palms and Cycads

Contributions towards the history of Zamia gigas, Lindl. & Hutt.

Cycadales of the English wealden

CYCAD CLASSIFICATION: CONCEPTS AND RECOMMENDATIONS; ED. BY TERRENCE WALTERS.

On the double nature of the Cycadean integument

The living cycads and the phylogeny of seed plants

Recherches sur l'appareil libéro-ligneux des Cycadacées

Cycads of Vietnam

Cuticle and epidermis of recent Cycadales

Hybrids in cycads

Bemerkungen uber einige Cycadeen

Aanteekening omtrent eenen nieuwen cycadëen-vorm in Amerika en deszelfs verhouding tot eenige fossile typen uit deze plantengroep

Genera et species Cycadearum viventium

Eenige aanteekeningen omtrent de Cycas circinalis L.

Über die Stellung der Cycadeen im natürlichen System

Over de Cycadeen in Nieuw-Holland

Undersøgelser og Betragtninger over Cycadeerne

Prodromus systematis Cycadearum

De Encephalarto Lehmanni Eckl. ad virum clarissimum Fr. Ant. Guil. Miquel animadversiones mittit

Monocarpy and pseudomonocarpy in the Cycadeoids

Berigt aangaande een' onlangs uit Java ontvangen' Cycas circinalis, L. gekweekt en thans bloeijende in den kruidtuin der stad Amsterdam

The oriental cycads in the field

Nouveaux matériaux pour servir a la connaissance des Cycadees

Persistent juveniles among the cycads

Bidrag til Cycadeenes Naturhistorie

Over eenige nieuwe of zeldzame Cycadëen in den Hortus Botanicus te Amsterdam

Cycads of the World

Ueber die gegenwärtigen Verhältnisse der Paläontologie in Schlesien, so wie über fossile Cycadeen

Bennettitales of the English Wealden

The Biology, structure, and systematics of the cycadales

Proceedings of Cycad 2005