|A. angustifolia 'Marginata'|
The World Checklist of Selected Plant Families regards Agave angustifolia as an illegitimate synonym for Agave vivipara L.
Other sources maintain them as distinct species with non-overlapping native distributions (García-Mendoza and Fernando Chiang 2003). A. angustifolia has narrow, stiffly erect leaves with moderately-spaced spines, producing capsules, not bulibiferous; whereas A. vivipara is described as having shorter, recurved leaves with short-spaced spines and bulbiferous. A. vivipara is likely similar to A. karatto. The A. vivipara of Miller (1768) and Smith et al. (2008) seem different, of a much smaller habit and narrower leaves, from the A. vivipara of Trelease (1913) and García-Mendoza and Fernando Chiang (2003), of a much larger habit.
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