Origin of depicted specimen: Japan, Honshu, Tochigi Pref., Mt. Nantai-san, 1900 m, volcanic substrate, collected by the late Katsuyuki Yoshimura (who was the first to determine the chromosome number of this species, October 5, 1970. Morphologically the flower of P. ramosa (2n=18) cannot be distinguished from P. variegata (2n=64) from which it differs only by the chromosomes and the stalk ramification (see 8049). P. ramosa is a strictly protected species!