
Agave franzosini Nissen
Vallone near Bordighera (Ludwig Winter's garden)
Die Agaven
Beiträge zu einer Monographie
Alwin Berger 1915
History of Portuguese Gardens. Garden Makers, Architecture, Plants, Art Monserrate Pena Sintra Portugal

Notes from Hortus Mortolensis (1912)
Though closely related to Agave filifera, this is without doubt specifically distinct. It never produces offsets, but always dies after flowering.