En The Plant List reconocen E. secunda y a E. secunda var.glauca como un sinónimo
http://www.theplantlist.org/tpl/search?q=Echeveria+secunda

Referencias Echeveria secunda
http://www.smgrowers.com/products/plants/plantdisplay.asp?plant_id=1883
http://apps.rhs.org.uk/plantselector/plant?plantid=2853
http://www.flickr.com/photos/mrsemper/7615260480/
http://www.hear.org/starr/images/image/?q=110307-2419&o=plants
http://www.infojardin.com/foro/showthread.php?t=190559