What is "trichosalpinx"

Trichosalpinx, commonly known as the bonnet orchid, is a genus of about 100 species of neotropical orchid. The genus is widespread across most of Latin America from northern Mexico to Bolivia, as well as the West Indies.

Trichosalpinx is characterized by the presence of a ringed, ribbed sheath around the stem. The generic name means "trumpet with hair" and refers to this ring.