lichens concrete surface

navigate by keyword : 17000 actually alga are background beautiful bed black both bright building classic color comprise concrete cracked craftmanship crafts cyanobacterium functioning fungus gray house image instances lichen lichenized lichens living nature organisms original photo project relationship rough single small some species spot stable surface symbiotic texture there two unit wall white worldwide

Cracked concrete surface with scattered patches of moss (Bryophyta) and lichens Royalty Free Stock Photo

Orange lichen (possibly *Xanthoria parietina*) grows on a textured concrete surface. Royalty Free Stock Photo

Weathered concrete surface with orange lichens in urban setting Royalty Free Stock Photo

Close-up of weathered concrete surface with yellow and gray lichens. Royalty Free Stock Photo

Lichens on a concrete surface Royalty Free Stock Photo

Detail of an old concrete wall covered with lichens, a vertical crack. Vintage. Background Royalty Free Stock Photo

Detail of an old concrete wall covered with lichens, with old garden shears. Background. Vintage Royalty Free Stock Photo

Xanthoria parietina grows on the ridged concrete surface of a garden fence in February. Berlin, Germany, Europe. Royalty Free Stock Photo

Rough, concrete surface of bunker wall Royalty Free Stock Photo

Grey Stone Surface Covered with Lichens and Moss Royalty Free Stock Photo

Detail of an old concrete wall covered with lichens. Vintage. Background Royalty Free Stock Photo

Lichens overgrown stone surface Royalty Free Stock Photo

Lichens on concrete wall. Royalty Free Stock Photo

Lichens and moss on concrete wall. Royalty Free Stock Photo

Lichen, or lichenized fungus, is actually two organisms functioning as a single, stable unit. Lichens comprise a fungus living in a symbiotic relationship with an alga or cyanobacterium or both in some instances. There are about 17,000 species of lichen worldwide.