(First upload on November 18 2007. Last on September 16 2014) [ 日本語 | English ]

Diphylleia grayi Fr. Schmidt

Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Diphylleia Mich. (サンカヨウ)
One species is native to Japan
Sankayou (サンカヨウ, 山荷葉), umbrella leaf Etymology of Japanese name: mountain (山) + lotus (荷葉)
Life form: perennial forb, with 30-50 cm tall
Distribution: Japan (Honshu - Hokkaido) - Sakhalin
Habitat: forests, including the edges
Stem: curly hair, scale-like leaf at the base
Leaf: 37 cm wide and 30 cm long
Flower: white, 6 petals, 6 sepals (when young) and 6 stamens, 1 cm long, one superior ovary and 2 ovlues
Inflorescence: 3-10 flowers forming corymb on the top (June-July)
Seed dispersal: animal → fruit = edible (sweet)
Belowground: widespread rhizomes and many, tough roots

Diphylleia cymosa Michx. ssp. grayi (Fr. Schmidt) Kitam.
Diphylleia cymosa Michx. ssp. grayi (Fr. Schmidt) Kitam. var. incisa (Takeda) T. Shimizu
Diphylleia grayi Fr. Schmidt var. incisa Takeda

f. incisa Takeda (Kirehasankayou, キレハサンカヨウ)
f. rotundata Takeda (Marubasankayou, マルバサンカヨウ)

Diphylleia grayi in Japan

[1] at the foot of Mount Teine, Sapporo, on May 25 1985 (Tsuyuzaki 1990). [2] near Ninoji Skislope, Niigata Prefecture, on June 6 1996 (Tsuyuzaki 1995). [3] at a western slope of Mount Yotei (羊蹄山), central Hokkaido, on June 28 2014. Records: Mount Eniwa on May 24 1980.