POLYPODIUM californicum. Polypody. An attractive small fern which often forms large colonies on shady banks and cliffs, nearly throughout the coast ranges of California. It has branched, creeping rhizomes, from which once-divided fronds about 1' tall, bright green in color, rise in early fall, lasting into spring. 'Sarah Lyman' is a selected form with deeply cut fronds giving a fringed appearance. The fronds die to the ground in summer, after which little or no water should be applied until fall. Hardy to 10^oF.or less.