Parmotrema internexum (Nyl.) Hale ex DePriest & B. Hale, 1998
Parmotrema internexum is characterized by the laminal isidia, ciliate lobes and the presence of norlobaridone (medulla KC+ rose-orange) and stictic acid (medulla K+ yellow, P+ slowly orange). Parmotrema crinitum (Ach.) M. Choisy, has a robust thallus (8‑25 cm broad), wider lobes (6–12 mm), often ciliate isidia, and norlobaridone lacking (Hale 1965).
In solvent C, the norlobaridone was “masked” inside the dot of stictic acid, but in solvent A the two dots were sharply distinct. However, the presence of this substance seems not universal, since it was not detected by Eliasaro (2001) and, according to Fleig (1997) and Eliasaro & Donha (2003), it was present only in some specimens.
The synonymy of this species is unclear. Hale (1974d) placed Parmelia internexa f. meiosperma Hue in Pseudoparmelia Lynge. Fleig (1997) listed Parmelia internexa var. meiosperma Hue, P. meiosperma (Hue) C.W. Dodge and P. catharinesis Müll. Arg. f. isidiosa Müll. Arg. as synonyms of Parmotrema internexum. However, in Hale & DePriest (1999) the first two names are synonyms of Hypotrachyna bogotensis (Vainio) Hale and the last one of Parmotrema crinitum (Ach.) M. Choisy.
[Spielmann & Marcelli 2009]