Niebla siphonoloba

©The World Botanical Associates Web Page
Prepared by Richard W. Spjut
April 2003, Oct. 2005, Sep 2012, Feb 2017

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.

 

 

 

Baja California: Mesa above San Antonio del Mar,
Spjut & Sérusiaux 17002,
 Jan 2016, Field id N. siphonoloba
Confirmed  by TLC Oct 2016, sekikaic acid + terpenes

 

siphonoloba-10561.jpg (160198 bytes)

Vizcaíno Peninsula, Arroyo San Andrés, type locality Spjut & Marin 10561, Apr 1989

siphonoloba-13077.jpg (100220 bytes)

Mesa Camacho N of Punta Canoas, Spjut & Marin 13077, Apr 1994

siphonoloba-9328C.jpg (41791 bytes)

Bahía Falsa near San Quintín,
Spjut 9328C, May 1986

siphonoloba-9594-isotype.jpg (68391 bytes)

Vizcaíno Peninsula, above Arroyo San Andrés, Spjut 9594, type, May 1986

siphonoloba--9636.jpg (47648 bytes)

Vizcaíno Peninsula, Sierra
Morro Hermoso,
Spjut 9636, May 1986

    Mesa between Punta
 Canoas and Puerta
Catarina, Spjut &
    Marin 13124
, Apr 1994, 
    sekikaic acid (TLC Jun 1994, Mar 1995)

Bahía Santa María,
Spjut 11560

Bahía Santa María,
Spjut 11561

Arroyo Sauces,
Spjut & Marin 11440

Mesa Camacho,
Spjut 13080

 

Geographical occurrences

Illustration of TLC data
for Niebla spp
.

sinuata-13114.jpg (151375 bytes)

Niebla sinuata Spjut ined.,
Spjut & Marin 13114,
Mesa Camacho, S of
Puerto Catarina, Apr 1994

sinuata-13115.jpg (124477 bytes)

Niebla sinuata,
Spjut & Marin 13115,
Mesa Camacho, Apr 1994

sinuata-13120.jpg (176384 bytes)

Niebla sinuata,
Spjut & Marin 13120,
Mesa Camacho, Apr 1994

     Niebla siphonoloba is a lichen that occurs frequently on volcanic rocks along the Pacific Coast from the Vizcaíno Peninsula of Baja California to the Channel Islands, California. The epithet was chosen for its 'pipe-like' or 'bent tubular' basal branches sparingly divided into secondary branches that hardly differ from the primary branch.  Thus, unlike many species of Niebla, N. siphonoloba does not produce distinct fragmentation branchlets.   Its deeply crateriformed cortex and terminal and subterminal mouth-like apothecia gives this lichen the appearance of a life form from another world.  The apothecia sometimes appear to 'smile,' others 'laugh,' while still others seem to be 'clamming-up.'

     Niebla siphonoloba is most similar to N. rugosa, which is easily distinguished by its secondary metabolite of divaricatic acid, in contrast to sekikaic acid in N. siphonoloba.  Additionally, N. rugosa has sharply angled branches, especially in the upper half of the thallus, undivided transverse cortical ridges that connect between the longitudinal ridges in which areoles (spaces) appear rectangular, compared to sinuous areoles of N. siphonoloba, and it has apothecia cups situated on saucer-like bases.

     Niebla siphonoloba was first discovered in a Niebla community on the Vizcaíno Peninsula near Arroyo San Andrés, represented by only sekikaic acid species, N. lobulata, N. suffnessii and N. usneoides.   Niebla siphonoloba was recognized by its mostly simple basal lobes and subterminal scattered apothecia.  Niebla lobulata was distinguished by its flattened branches with lobulate to broadly lobed margins.  Niebla suffnessii was identified by its numerous long whip-like branchlets, and N. usneoides was easily identified by its abundant isidia. 

     A community of Niebla species almost exclusively dominated by sekikaic-acid thalli such as found on the Vizcaíno Peninsula is rare, while partial segregation of chemotypes by habitat type have been reported from near Punta Canoas (Spjut 1996), volcanic slopes near Bahía de San Quintín (Rundel et al. 1972), and  near El Tomatal (Sipman, Willdenowia 19: 543–555, 1990). 

     Niebla siphonoloba has been found growing with N. lobulata and N. marinii at Morro Santo Domingo, N. podetiaforma, N. lobulata, and N. flabellata along the shores of Bahía Santa María, N. suffnessii, N. lobulata, and N. usneoides on Mesa Camacho, and N. josecuervoi at Bahía de San Quintín. 

     On Santa Cruz Island, specimens referred to Niebla siphonoloba, as shown below for one (Bratt 6426) of many studied from Ragged Mt., have more basal branches with a cortex that is crateriformed instead of the sinuous ridging seen in the Baja California specimens. This variant from Santa Cruz Island, possibly a distinct species, appears related to the densely branched N. dactylifera on San Nicolas Island.  However, it also intergrades with N. fimbriata on Santa Cruz Island (e.g., Bratt 6436, Photo 12.3 in Spjut 1996), distinguished by the strongly arched basal branches with intact fimbriate branchlets, while sharing the craterformed cortex as also seen in N. dissecta.  These Channel Island species probably represent a sekikaic acid species complex that has undergone adaptive radiation since their isolation from the mainland species and may have occasionally hybridized, including also the related N. cornea and N. disrupta.

     On Mesa Camacho, an undescribed species, referred to as  N. sinuata, differs by the intermarginal sinuous lobes and apothecia developing further below the apex.

Additional Reference:

Rundel, P.W.,  P.A. Bowler & T.W. Mulroy. 1972. A fog-induced lichen community in northwestern Baja California, with two new species of Desmazieria. The Bryologist 75: 501–508.