This paper treats four North American yellow or orange sorediate species, C. chrysodeta, C. citrina, C. tominii, and C. xanthostigmoidea. These species are mostly sterile and sorediate and usually occur on rocks and soil. Other related non-American species, C. proteus, C. soropelta, and C. xantholyta are also discussed in relation to the treated species. Descriptions, distribution maps, and color illustrations are provided for the treated taxa.