Commelina diffusa var. diffusa(climbing dayflower, "Shimatsuyukusa")
Japanese name: シマツユクサ（島露草） Scientific name:Commelina diffusa var. diffusa
[Overview]
An annual found along damp roadsides and in grassland.
The stem creeps along the ground at the base and branches, spreading by producing roots from the nodes.
The upper part of the stem rises to a height of 60–90 cm.
The leaves are simple and alternate, lanceolate to ovate-lanceolate, 4–7 cm long and 1.2–1.5 cm wide, entire and hairless.
The leaf base wraps around the stem like a sheath.
From the leaf axils at the stem tips, opposite the leaves, it bears boat-shaped bracts folded in two, and a cyme inside them.
The margins of the bract are not fused; when spread open, it is narrowly ovate to ovate-lanceolate, 1.5 cm long and narrow, curved like a sickle, and gradually tapers to a long slender point.
The flowers emerge one at a time outside the bract and wither in a day.
The flower stalks project from the involucre.
The flowers are pale blue with 3 petals; of the 3 petals, 2 are large and the lower one is somewhat smaller, but there are no great differences in size or color as in Tsuyukusa.
There are 3 sepals.
The fruit is an oblong capsule divided into 3 chambers, releasing 5 seeds.
The seed surface is uneven.
