| Name | Cladonia pleurota f. extensa (Hoffmann) Zahlbruckner |
| Authorship | (Hoffmann) Zahlbruckner |
| Rank | Forma |
| Placed in | Cladonia pleurota (Flörke) Schaerer |
| Citation | 1931-32 Cat. Lich. Univ. 8: 468 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Cladonia pleurota f. extensa (Hoffmann) Zahlbruckner |
| Identification made in | [no date] (2) |
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