β ββ ββββ
βββ β βββ β ββ ββ ββββ
βββ β βββ β βgreen leaves
The underside of a leaflet of the fern Calliptera prolifera, showing the arrangement of the spores (sporangia, sori).
The underside of a leaflet of the fern Calliptera prolifera, showing the arrangement of the spores (sporangia, sori).
