Niebla dilatata

The World Botanical Associates Web Page
Prepared by Richard W. Spjut
April 2003, Oct. 2005, Sep 2012

Niebla and Vermilacinia (Ramalinaceae) from California and Baja California.  
Spjut, R.W., 1996. ISSN 0833-1475, 208 pp.  
Sida, Botanical Miscellany 14. Botanical Research Institute of Texas, Inc.

undulata-11336.jpg (116623 bytes)

Inland ~ 2 mi from Punta Canoas,
Spjut & Marin 11336, Apr 1990


Near Puerto Catarina,
Spjut & Marin 13046


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Punta Cono, Spjut &
Marin 11512
, Apr 1990


Isla Guadalupe, Weber &
McCoy 82 isotype

Near Puerto Catarina,
Spjut & Marin 13053


Near Puerto Catarina,
Spjut & Marin 13050


     Niebla dilatata is an endemic lichen to Baja California, occurring on Isla Guadalupe and along the Pacific Coast from the Vizcano Peninsula to near Puerto Catarina. It appears most common on rocks along the northern shore of the Vizcano Peninsula, west of Guerrero Negro.  It is identified by the flattened thallus branches with broad undulating lobes, usually thicker at margins, in contrast to the deltoid more sharply pointed thinner segments of N. caespitosa

     Niebla dilatata was reported as endemic to Isla Guadalupe (Spjut 1996); however, specimens from peninsular BCN, previously included under N. caespitosa (Plate 3D and Plate 3E in Spjut 1996), have since been interpreted as belonging to N. dilatata (Spjut, this [WBA] website, 2005).  Niebla dilatata was distinguished by its cortex of intermediate thickness, 75120 m thick, compared to < 75 m thick in N. caespitosa and related species in Baja California, and >125 m thick in other species on Isla Guadalupe and in California (Spjut 1996).