Asiatic Dayflower
Commelina communis L. [Commelinaceae]
Family Commelinaceae
ca 40 genera, and > 650 spp. worldwide
Genus Commelina
ca 170 species worldwide
Species in Japan
C. benghalensis L. (マルバツユクサ): Western Honshu, Shikoku, Kyushu
C. diffusa Burman fil. (シマツユクサ): Below Kyushu (annual)
C. auriculata Bl. (ホウライツユクサ): Western Honshu
C. communis (Tsuyukusa, ツユクサ, 露草): East Asia
C communis var. hortensis Makino
Commelina communis in Hokkaido
Lake Toya
Toya Marine Station, Hokkaido University, on August 21, 2007. The seed has a specific pattern on germination.
Sapporo
A parking lot along a radoside at East Ward in the city of Sapporo on August 30, 2008. [Left] A whole plant. [Right] Close-up of a flower.