J. Bot. 76: 349 (1938).

Protolog: Thallus primarius non visus. Podetia tenuia circiter 0 mm., 3-0 nn,m 6 (1 mm.) crassa, base axem sympodialem dichotomiis inaequalibus efficientia, summo dichotomiis subaequalibus, raro trichotomiis, ramosa; caespitoso-conferta; circiter 5-10 cm. alta; axillis integris vel raro perforatis; ramulis ultimis tenuibus, vulgo rectiusculis divaricatis que vel leviter undique deflexis praedita; tota albida vel ablido-cinerascentia vel base emoriente nigricantia et apicibus ultimis dilute-fuscescentia; ecorticata, semipellucida, parte superiore sub-arachnoideo-tomentosa, parte inferiore verruculosa; KHO+ bene lutescentia; paraphenylenediamina+ bene rubescentia, amara gustu. Apothecia non visa. Conidangia fusco-nigrescentia, ovoidea, plus minusve base constricta, materiam coccineam continentia.
In memoriam satis revocat habitu generali nec colore Cladoniam impexum Harm. paulo tenuiorem.

Protolog type data: Jamaica: near Cinchona, altit. 1480 m., on talus, coll. W. Harris, 1896. Another specimen from Jamaica without indication of precise locality, coll. D. Bickmore, 1934.

Type locality: Jamaica, St. Andrew, near Cinchona, 1480 m, 1896, W. Harris s.n. (BM - lectotype; UCWI - isolectotype). Lectotypified by Ahti (1984).

Type locality coordinates: 18°1'0"N, 76°54'0"W; 18.016667, -76.9.