Pustula obtusata

Pustula obtusata, Goatsbeard White Rust, is an oomycete plant pathogen unrelated to fungal organisms.

Albugo tragopogonis is the old but illegitimate name for Pustula obtusata, the causal agent of white blister disease on goatsbeard (Tragopogon spp.). This name has often been misapplied to the subflower white blister pathogen.