What's the difference between shellflower and snakehead?

Shellflower

Definition:

Example Sentences:

Definition:

(n.) A loose, bent-up end of one of the strap rails, or flat rails, formerly used on American railroads. It was sometimes so bent by the passage of a train as to slip over a wheel and pierce the bottom of a car.
(n.) The turtlehead.
(n.) The Guinea-hen flower. See Snake's-head, and under Guinea.

Example Sentences:

(1) The Fat Whites play a series of gigs before Christmas, with Dale Barclay (ex- the Amazing Snakeheads ) taking Saul’s place on stage.
(2) The presence and partial characterization of immunoreactive atrial natriuretic peptide (ir-ANP) in the bulbus arteriosus were investigated using high performance liquid chromatography (HPLC) and radioimmunoassay (RIA) in several freshwater teleostean fish (catfish, silver crusian carp, snakehead, and rice eel).