Arabidopsis halleri subsp. gemmifera var. senanensis
Arabidopsis halleri subsp. gemmifera var. senanensis("Hakusanhatazao")
Japanese name: ハクサンハタザオ（白山旗竿） Scientific name:Arabidopsis halleri subsp. gemmifera var. senanensis
[Overview]
A perennial 10–30 cm tall, found on rocky, gravelly ground in the mountains and preferring partial shade.
Several stems grow in a clump; the base has a mixture of forked and simple hairs, and the upper part is usually hairless.
After flowering the stems fall over and produce asexual buds from the leaf axils, by which the plant propagates.
There are two kinds of leaves, basal leaves and stem leaves.
The basal leaves form a rosette; they are lanceolate, 2–7 cm long and 0.8–1.5 cm wide, deeply pinnately lobed with a large terminal lobe, and hairy on the upper surface.
The basal leaves have petioles.
The stem leaves are alternate and lanceolate, 1–4 cm long, and are either pinnately lobed or simple with toothed margins.
A raceme at the stem tip bears white or pale reddish-purple flowers with 4 petals.
The fruit is a linear silique constricted like a string of beads.
The seeds have no wings.
