Tillandsias are regarded as true air plants and as such are among the most unusual of the Bromeliad family. They range from bulbous forms and grass like structures to silver tufted masses. Typically they grow where there is free air movement like high treetop environments or across open rock faces, and often they are heavily covered in silver trichomes that help reflect the high levels of sun light they receive in these locations. While some tolerate temperatures as low as 5 degrees C (40 degrees F), or even lower, most prefer temperatures of around 10-32 degrees C (50-32 degrees F). While they require high levels of humidity, they need to dry out quickly and completely between misting or watering. As the trichome scales open to absorb moisture and close to retain it, it is important that the plants are given time to dry out and most plant deaths occur because of over watering.