National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
Reference for:
Cycadales
Source:
The PLANTS Database
Acquired:
2000-01-21
Notes:
National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
Reference for:
Cycadales
Source:
The Gymnosperm Database
Acquired:
2012-03-22
Notes:
Available at http://www.conifers.org/index.php
Reference for:
Cycadales
Source:
Angiosperm Phylogeny Website, 2014
Acquired:
2014-11-19
Notes:
Angiosperm Phylogeny Website, botanical information system at the Missouri Botanical Garden, available at http://www.mobot.org/MOBOT/research/APweb/
Reference for:
Cycadales
Source:
ITIS & Species 2000 Catalogue of Life Management Hierarchy, 2014
Acquired:
2014-11-25
Notes:
M. Ruggiero & D. Gordon, eds. 2014. Consensus Management Hierarchy for the ITIS & Species2000 Catalogue of Life. Contributors: Nicolas Bailly, Thierry Bourgoin, Richard Brusca, Thomas Cavalier-Smith, Daphne Fautin, Dennis Gordon, Gerald Guala, Michael Guiry, Paul Kirk, Elliot Lefkowitz, David Mabberly, David Maddison, Alan Paton, Michael Ruggiero, Peter Stevens, and Brian Tyndall
Reference for:
Cycadales
Publication(s):
Author(s)/Editor(s):
Christenhusz, Maarten J. M., James L. Reveal, Aljos Farjon, Martin F. Gardner, et al.
Publication Date (Listed/Actual):
2011-02-18 / 2011-02-18
Article/Chapter Title:
A new classification and linear sequence of extant gymnosperms
Journal/Book Name, Vol. No.:
Phytotaxa, vol. 19
Page(s):
55-70
Publisher:
Publication Place:
ISBN/ISSN:
/1179-3155
Notes:
Available online at http://www.mapress.com/phytotaxa/content/2011/f/pt00019p070.pdf