Xanthoparmelia maricopensis

Xanthoparmelia maricopensis, the Maricopa rock-shield, is a 2–6 cm (0.8–2.4 in) wide, yellow-green foliose lichen in the Parmeliaceae family. It grows on igneous rock in southwestern North American deserts.[1][2][3]

Xanthoparmelia maricopensis
Scientific classification
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Lecanorales
Family: Parmeliaceae
Genus: Xanthoparmelia
Species:
X. maricopensis
Binomial name
Xanthoparmelia maricopensis
T.H.Nash & Elix (1986)

Description

The thallus is tightly adnate to the substrate, with irregular somewhat shiny 1–2 mm lobes.[2] It differs from Xanthoparmelis dierythra in that it has hyposalazinic acid and the lobes are usually more narrow and convex. The lower surface is tan and has unbranched rhizenes.[3]

Metabolites

The upper cortex is K-, C-, KC-, and P-. The medulla is K+ yellow to orange, C-, KC-, P+ orange.[2] The upper cortex has usnic acid as a secondary metabolite.[2] The medulla has norstictic acid and traces of hyposalazinic acid and connorstictic acid.[2]

Distribution and habitat

It is common in lower elevations of the Sonoran Desert in Arizona, southern California, and north and south Baja California to Chihuahua, Mexico and Sonora Mexico.[2] In Joshua Tree National Park it grows on non-calcareous rock, soil, basalt, gneiss, and monzogranite.[1]

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See also

References
  1. Xanthoparmelia maricopensis in the Joshua Tree National Park (California, U.S.A.), Map collection, Kerry Knudsen, Kocourková Jana.
  2. Lichen Flora of the Greater Sonoran Desert Region, Vol 2., Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001.
  3. Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2. Page 138.
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