Cnidium japonicum, a
biennial herb 10-50cm tall, occurs in sandy soil on seashores with
thick root systems. Stems branch at the lower parts and either crawl
or erect. Leaves are 3-10cm-long, mono-pinnate compounds; the lobes
cut themselves pinnately. Branch tips emerge small, sparse compound
umbels and set small white flowers; involucral bracts and involucel
bracts are small and short. Fruit is about 3mm long and
flat-spherical, and ridges expand in a keel way, which is prominent.
Bloom time: August-October.