Bistorta tenuicaulis is a
perennial herb of 15-25cm in height found in forests in mountainous
regions. Its radical leaves are ovate or orbicular-ovate, 2-10cm in
length, the tips pointed and the margins entire, and the bases
abruptly tapering off to both sides of long pedicles. Spikes, 2-4cm
in length, emerge on the tips of flower stalks. Flowers, lacking
petals, have sepals cleft deeply in 5 segments; stamens, 8 in
number, popping out; anthers are red. Bloom time: April-May.