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Titre du document / Document title

The lichen flora of two sites in the Mojave Desert, California, USA

Auteur(s) / Author(s)

KNIGHT Kathryn B. ; CLEMENTS Deborah R. ; GORDILLO Luis F. ; JEFFERIES Jonathan I. ; TILLEY Derek ; WORKMAN Taylor J. ; LLOYD Anna F. ; ST. CLAIR Larry L. ;

Résumé / Abstract

Forty lichen species in 24 genera were identified from selected sites in the Mojave National Preserve, California. Collections were made from north-facing basalt flows, on rock, soil, and dead wood. Environmental conditions in the Mojave Desert (extreme heat and drought) generally restrict development of lichen communities except in protected locations. Saxicolous lichen communities were best developed along north-facing aspects of extensive basalt flows. South-facing exposures were completely devoid of lichens. Common saxicolous lichens, included Dermatocarpon miniatum, Lecanora garovaglii, Lobothallia praeradiosa, Pleopsidium flavum, Rhizoplaca melanophthalma, and Thyrea confusa. Terrocolous lichen communities were generally patchy and poorly developed but showed best development along the edges of ephemeral watercourses. Terricolous lichens included Collema tenax, Peltula obscurans var. hassei, and Placidium squamulosum. Xanthoria fallax was locally common on decorticated branches of Blackbrush (Coleogyne ramosissima) and occasionally on Creosote bush (Larrea tridentata).

Revue / Journal Title

Mycotaxon    ISSN  0093-4666   CODEN MYXNAE 

Source / Source

2002, vol. 84, pp. 27-32 [6 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Mycotaxon, Ithaca, NY, ETATS-UNIS  (1974) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 17106, 35400010404227.0030

Nº notice refdoc (ud4) : 14485767



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