hyaline cells of stem leaves from sphagnum squarrosum lack fibrils

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