What is the flower/plant that stands for: danger?

Questions

(It.) - Simple, simply.?

(It.) - Always. Sempre piu mosso, always getting faster.?

(It.) - Without.?

- (1) A group of seven performers which may consist of instrumentalists or singers; (2) A composition for seven performers which, if for instrumentalists, will have the character of a sonata in several movements.?

- A group of seven notes to be played in the time of 4 or 6.?