Sticta parahumboldtii inhabits the Colombian Andes, growing in high-andine forests and
páramo vegetation, at elevations ranging from , in shaded to semi-exposed microsites. This species has been found in the
Cordillera Central,
Cordillera Occidental, and the western slopes of the
Cordillera Oriental.
Sticta parahumboldtii typically grows on mossy soil and
epiphytically, frequently found in association with species of
Metzgeria,
Frullania, and
Leptogium.
Sticta parahumboldtii is one of only a few species in the genus
Sticta that possess an upper , a
cyanobacterial photobiont, and lack vegetative . There are two other species in Colombia that share a very similar
morphology:
S. humboldtii and
S. pseudohumboldtii. ==References==