Japan Flora: Delicate glabrous herb, 4-6 cm. high (in 이］rs); stipes very slender; sterile blade obovate, sometimes ovate, 3-5 mm. long, 2-3 mm. wide, usually ternate (in ours), the petiole about 1-2 mm. long, the segments obovate or cune­ate, obscurely undulate on upper margin, few-nerved; fertile part consisting of a short slender peduncle with few pairs of sporangia. Aug. Mossy forests in high mountains.

Honshu (Mount Yatsugatake in Shinano); very rare. e. N. America and Europe (Austria).