botanical study of selaginella strobilus under microscopic view

abstract background botany card cell closeup detail education floral flower generation glowing growth heterosporous isolated laboratory leaf love magnification megasporangia megasporophylls micro microorganism microphyllous microscope microscopic microscopy microsporangia microsporophylls mobile needlelike pattern phone pink plant research science scientific selaginella sessile single slide small spikemosses sporangia sporangium stem structure textured vascular white