Etymology:
Honoring General Ignacio Zaragoza.
Historical notes: Described in 1963 by Mexican botanist Medellin-Leal. Distinguishing features: Narrow, attenuate leaflets, short spirally twisted leaves, smooth rachis. Distribution and habitat: Endemic in San Luis Potosi state, Mexico, at about 1800 m alt in the Sierra de la Equiteria. In pine-oak forest on volcanic outcrops. Conservation status:
Endangered.
1997 IUCN Red List of Threatened Plants category E.
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