Japanese name: オオバミゾホオズキ（大葉溝酸漿） Scientific name:Mimulus sessilifolius
[Overview]
A perennial 10–30 cm tall, found in wetlands of the subalpine zone.
It has creeping rhizomes.
The stem is almost unbranched and erect.
The leaves are simple and opposite, 2.5–6 cm long and 1–3 cm wide, ovate to broadly ovate, and soft.
The leaf margin has pointed serrations.
The leaves have no petioles.
The flowers are yellow, tubular and two-lipped, 2.5–3 cm long, borne singly in the axils of the upper leaves; the upper lip is 2-lobed and the lower lip is 3-lobed.
The base of the inside of the flower has reddish brown spots.
The calyx is tubular, 5-lobed at the tip, with triangular lobes.
The calyx has 5 ridges, which often bear wings.
The flower stalk is slender, 2–3 cm long.
The fruit is an oblong capsule enclosed by the calyx.
