two stem leaves of the spiky peat moss, sphagnum squarrosum

moss peat leaf sphagnum stem abstract micrograph bryophyte thick walled cells refractory cell walls hyaline fibrillose fibrils annular thickenings rings bright color green chlorophyllose bog gametophyte haploid monoploid spore bearing plant land early magnified crossed polarizers polarization light primary producer trophic pyramid environment biology botany science art nature natural people