Nigella sativa is an annual flowering plant, native to south and
southwest Asia. It grows to 20–30 cm (7.9–12 in) tall, with
finely divided, linear (but not thread-like) leaves. The flowers
are delicate, and usually coloured pale blue and white, with
five to ten petals. The fruit is a large and inflated capsule
composed of three to seven united follicles, each containing
numerous seeds. The seed is used as a spice. The scientific name
is a derivative of Latin niger (black). Common names  In
English, Nigella sativa seed is variously called fennel flower,
nutmeg flower, and Roman coriander. Other names used, sometimes
misleadingly, are onion seed and black sesame, both of which are
similar-looking, but unrelated. Blackseed and black caraway may
also refer to Bunium persicum. The seeds are frequently referred
to as black cumin (as in Assamese: kaljeera or kolajeera or
Bengali kalo jeeray), In south Indian language Kannada it is
called [ಕೃಷ್ಣ ಜೀರಿಗೆ] "Krishna Jeerige", but this is also used
for a different spice,