Technical/botanical adjective; usually relative, so comparative and superlative forms are not needed.
chlorophyllienEn parlant d’un tissu ou d’un organisme contenant de la chlorophylle, ou verdissant grâce à la chlorophylle. The chlorophyllous tissues of the plant were visible under the microscope.
Les tissus chlorophylliens de la plante étaient visibles au microscope.