cross section of a moss seta, dicranum fulvum, at 400x

moss sporophyte bryophyte seta stalk transverse cross vascular tissue water relations conduction transport thick cell walls micrograph light magnified polarization brilliant color orange glowing reproduction sexual refractive birefringent diploid spore bearing plant land dicranum boulder broom early lower primary producer trophic pyramid people fulvum 400x looks like old roman coin