Hypotrachyna costaricensis
≡Parmelia costaricensis Nyl. in H. Polakowski, J. Bot. 13: 225 (1877).
Description : Flora (1985: 197). See also Elix (1994h: 52).
Chemistry : Cortex K+ yellow, UV−; medulla K−, C−, KC−, Pd−; containing atranorin, chloroatranorin, protolichesterinic acid and unidentified fatty acids.
N: Northland (Rangitoto I.) Auckland. On Metrosideros excelsa (pohutukawa) bark. Known also from Central America, the Caribbean, South America, SE Asia, Papua New Guinea and Queensland (Louwhoff & Elix 2002a: 47; Nash et al. 2002b: 242; McCarthy 2003c, 2006).
Pantropical
Illustrations : Hale (1975: 27, fig. 8f); Louwhoff & Elix (2002a: 46, fig. 12).
Hypotrachyna costaricensis is characterised by: the corticolous habit; the maculate, isidiate upper surface; and fatty acids in the medulla.
