Agave wislizeni subsp. parrasana
This succulents, native to North East Mexico, grows in mountainous areas at high elevetion, on chaparral shrub, pine-oak forests on limestone and grassy slopes. It is endemic to a very small area in south-eastern Coahuila.
This small sized Agave produces a compact, subspherical and symmetical rosette, that usually is 60 cm tall and wide. The waxy leaves are short, stout, oboval; they are grey-green covered in a silver dusting. On the margins, there are brown-greenish spines, and a thin red terminal spine. Flower buds are red, until they get ripen: blooming, they get yellow. They are protected by thick bract leaves. Filaments are long, reddish purple, while anthers are yellow. Agave Parrasana blooms once in summer, then it dies.
Agave Parrasana grows slowly, and it does well in containers and well drained outside spots. Soil have to be porous and well-drained. They needs full sun to be healthy , compact, and with their tipical blue-grey colors.Water ongly when the soil is dry. Older plants need less watering than younger ones. In winter, it is enough once every 1-2 months. This succulent is hardy to frosting temperatures down to at least – 12° C, particularly when dry (anyway, to be sure to avoid damages, avoid severe freezing temperatures). Agave Parrasana is also excellently heat and drought tolerant. However, if subjected to drastic changes in its growing conditions, it can suffer from indoor burn and edema.
Propagation can be done by seeds, or by suckers: remove them in summer, let them dry, then put them in compost.
The name of this Agave is a geographical epithet: it refers to its location in the Sierra de Parras.