Lichen Tour

Lichenology -- BOT 465/565

Dept. of Botany & Plant Pathology, Oregon State University, Corvallis

Copyright B. McCune 2007

Morphology    
  Growth forms
    foliose - fruticose - crustose - squamulose - calicioid - leprose - basidiolichens
Thalllus structure  
    heteromerous (stratified) - homoiomerous (gelatinous) - cephalodia
  Upper surface  
    pruina - pseudocyphellae - scabers - tomentum
  Lower surface  
    cyphellae - hapter - pseudocyphellae - rhizines - rhizohyphae - tomentum - umbilicus - veins
Reproduction    
  Asexual  
    soredia - isidia - lobules - schizidia
  Sexual  
    ascomycetes: apothecia - perithecia - ascus - ascospores - pycnidia - spermatia
    basidiomycetes: basidiocarps - basidia and basidiospores
Photobionts    
  Cyanobacteria
    Nostoc: freeliving - lichenized
    Stigonema: freeliving - lichenized
    Gloeocapsa: freeliving - lichenized
    Scytonema: freeliving - lichenized
    Chroococcus - lichenized
  Green algae
    Chlorococcoid (Trebouxia etc.)
    Trentepohlia: freeliving - lichenized
    Coccomyxa: lichenized
    Stichococcus: lichenized
Methods  
  Sectioning apothecia
     P test
     KC test
     acetone extract for K and C tests in Bryoria
Secondary substances    
  alectorialic acid K+Y KC +O P+Y
  atranorin K+Y P+ pale Y
  fumarprotocetraric acid K- or K+brownish, P+R
  lecanoric and gyrophoric acids C+R KC+R
  lobaric acid KC+R, UV+
  norstictic acid K+R, P+O
  parietin K+R or purple
  perlatolic acid  K-, KC- or weak pinkish, P-, UV+ blue-white
  picrolichinic K+ weak pinkish, KC+ red or purple
  physodic acid KC+R
  psoromic acid P+ deep Y
  salacinic acid K+O P+O
  squamatic acid UV+ blue white
  stictic acid K+Y P+O
  thamnolic acid K+ deep Y, P+O
  usnic acid KC+Y