Relicina ramboldii
Relicina ramboldii is a species of saxicolous foliose lichen in the family Parmeliaceae. Described in 1988 from Mount Baga in Queensland, this lichen forms pale greenish leaf-like patches on basalt rocks with narrow edged with black hair-like projections. It rarely produces fruiting bodies, instead reproducing mainly through small outgrowths on its upper surface. The species is known only from central Queensland, where it grows on partially shaded rock walls at moderate elevations.
Taxonomy
Relicina ramboldii was described as a new species in 1988 by the Australian lichenologists John Elix and Jen Johnston. The type specimen was collected by the German lichenologist Gerhard Rambold on partially shaded basaltic rock walls with a southerly aspect on Mount Baga, at 200–230 m elevation.In a later treatment of the genus, Elix and Johnston regarded Relicina ramboldii as the isidiate counterpart of the fertile species R. clarkensis from central Queensland.
Description
Relicina ramboldii forms foliose thalli that grow tightly attached to rock surfaces, pale green to yellow-green and up to about 8 cm across, with narrow linear about 1–2 mm wide whose swollen margins are fringed with conspicuous black. The upper surface is flat to slightly convex, with shiny lobe tips that become cracked and bear relatively sparse, simple isidia as the thallus ages, while the lower surface is brown and densely covered with black, branched rhizines. Apothecia are rare and small, appearing as dark brown on the thallus surface, and minute, dot-like pycnidia immersed in the thallus produce asexual conidia.In standard spot tests the is K−, while the medulla reacts K+, C− and P+. The lichen produces usnic acid together with hypostictic acid, stictic acid, traces of constictic acid and minor amounts of menegazziaic acid in the medulla.