Den senile is the White Haired Dendrobium, native to Laos and surrounding region. It's a miniature sized cool to warm growing epiphytic plant, and has a winter rest period.  It's tolerance for huge range of temperature makes it beginner friendly.  During grow season, Den. senile can take an abundance of light, but slightly shaded. Ensure strong air circulation throughout the year and full dry outs in the winter periods.