Stereocaulon
Family: Stereocaulaceae
Stereocaulon image
Troy McMullin
  • Greater Sonoran Desert
  • Resources
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2002. Lichen Flora of the Greater Sonoran Desert Region. Vol 1.
Life Habit: lichenized Thallus: fruticose, occasionally reduced and more crust-like, attached by the whole lower surface or by basal holdfasts surface: grayish, ochraceous-yellowish, olivaceous, brownish, rose or white, contiguous or granular-farinose to spongiose-filamentous, with or without tomentum photobiont: primary one a chlorococcoid alga, secondary photobiont a cyanobacterium (Nostoc or Stigonema or occasionally Scytonema or Chroococcus) usually present in cephalodia on the pseudopodetia; cephalodia: mostly irregularly globose lower surface: tomentose to glabrous primary thallus: usually rudimentary and disappearing early but in some species persistent, composed of basal granular or squamule-like structures (phyllocladia) Pseudopodetia: solid, ± terete, weakly to strongly branched, fruticose in appearance, usually corticate; central axis: cartilaginous, composed of thick-walled, longitudinal hyphae secondary thallus: shrubby, erect to decumbent, composed of stalks (pseudopodetia), developing from a ± well-developed holdfast in some species, phyllocladia: or phyllocladioid branchlets: verrucose to granular, cylindrical, squamulose or foliose, containing the algae and a loosely interwoven medulla, sometimes appearing dorsiventral; with or without soredia Ascomata: apothecial, terminal or lateral, roundish, sessile or substipitate or stipitate; disc: plane to often convex, pale brown to red-brown, dark brown or black, without a thalline margin; exciple: prominent (raised) to ± soon disappearing, sometimes pale and appearing almost thalloid; hymenium: hyaline below, brown, or ochraceous-yellowish above; paraphyses: unbranched, not (or scarcely) anastomosing, apices mainly with a brown cap; hypothecium: hyaline or ochraceous-yellowish (to brown in some species) asci: clavate to cylindrical, unitunicate, tholus I+ blue; in K/I with a blue outer layer, and a blue apical dome with a ± central, darker blue tube, c. 8-spored ascospores: ellipsoid, hyaline, clavate, or fusiform to cylindrical, acicular, or vermiform, transversely 1-13 septate, (12-) 16-100 (-200) x 2-7 µm, hyaline, smooth, thin walled, without distinctly developed endospore thickening, I- Conidiomata: sometimes present, terminal or lateral, immersed in the tips of phyllocladia, ovoid to spherical, darkened around ostiole conidia: formed acrogenously, filiform to cylindrical, straight or curved, simple Secondary metabolites: orcinol and beta-orcinol depsides, orcinol and beta-orcinol depsidones and aliphatic acids Geography: arctic-alpine, boreal and montane regions of Northern and Southern Hemispheres Substrate: on soil, bryophytes, detritus, or non-calciferous, siliceous rock; in cool to cold, humid areas. Notes: The genus is not likely to be confused with any other, except perhaps Leprocaulon, which has very fine, ecorticate branches and lacks ascomata.
Show all taxa || << 1 - 50 taxa >>
Stereocaulon abduanum
Images
not available
Stereocaulon acaulon
Images
not available
Stereocaulon aciculare
Images
not available
Stereocaulon alishanum
Images
not available
Stereocaulon alpestre
Images
not available
Stereocaulon alpinum
Image of Stereocaulon alpinum
Stereocaulon andinum
Images
not available
Stereocaulon anomalum
Image of Stereocaulon anomalum
Stereocaulon antarcticum
Images
not available
Stereocaulon aogasimense
Images
not available
Stereocaulon apocalypticum
Image of Stereocaulon apocalypticum
Stereocaulon arcticum
Image of Stereocaulon arcticum
Stereocaulon arenarium
Image of Stereocaulon arenarium
Stereocaulon areolatum
Images
not available
Stereocaulon argellum
Images
not available
Stereocaulon argodes
Images
not available
Stereocaulon argus
Image of Stereocaulon argus
Stereocaulon armatulum
Images
not available
Stereocaulon assimile
Images
not available
Stereocaulon atlanticum
Image of Stereocaulon atlanticum
Stereocaulon austroindicum
Images
not available
Stereocaulon austroshetlandicum
Images
not available
Stereocaulon azoreum
Image of Stereocaulon azoreum
Stereocaulon azulense
Image of Stereocaulon azulense
Stereocaulon azulensis
Images
not available
Stereocaulon botryocarpum
Image of Stereocaulon botryocarpum
Stereocaulon botryophorum
Images
not available
Stereocaulon botryosum
Image of Stereocaulon botryosum
Stereocaulon brassii
Image of Stereocaulon brassii
Stereocaulon buchananii
Images
not available
Stereocaulon caespitosum
Image of Stereocaulon caespitosum
Stereocaulon canescens
Images
not available
Stereocaulon capense
Images
not available
Stereocaulon capitellatum
Image of Stereocaulon capitellatum
Stereocaulon carinthiacum
Images
not available
Stereocaulon cephalocrustatum
Images
not available
Stereocaulon cereolinum
Images
not available
Stereocaulon cereolus
Images
not available
Stereocaulon chlorellum
Images
not available
Stereocaulon chlorocarpoides
Image of Stereocaulon chlorocarpoides
Stereocaulon cinchonae
Images
not available
Stereocaulon claviceps
Image of Stereocaulon claviceps
Stereocaulon colensoi
Image of Stereocaulon colensoi
Stereocaulon commixtum
Image of Stereocaulon commixtum
Stereocaulon compactum
Images
not available
Stereocaulon complanatum
Images
not available
Stereocaulon condensatum
Image of Stereocaulon condensatum
Stereocaulon condyloideum
Images
not available
Stereocaulon confluens
Image of Stereocaulon confluens
Stereocaulon congestum
Images
not available

This project made possible by National Science Foundation Awards: #1115116