Chemistry: usnic acid only by tlc.
Ecology and distribution. Several collections from coastal rocks (rarely Hebe scrub) from the Falkland Islands, Chile (inc. Juan Fernandez).
Notes: Similar to R. terebrata but usually abundantly fertile and the pseudocyphellae not becoming sorediate.
The f. flaccidissima (Bory) Zahlbr. differs in having narrow, strap-like lobes but intermediates are frequent and, as both forms often occur on the same thallus, it is included in f. laevigata. The typification of R. flaccidissima has not been resolved and the type specimen was not available for loan. It is possible that R. flaccidissima is an earlier name for R. terebrata.
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