shí​cán

betony

石蚕 石蠶 shí​cán
betony
A perennial herb in the mint family with square stems and pale red or white flowers, commonly known as germander or betony.
stony coral
A reef-building coral polyp of the order Scleractinia that secretes a hard calcium carbonate skeleton
caddisfly larva
The aquatic larva of a caddisfly, which builds a protective case out of silk and environmental debris like sand or small stones