Here's how I read the traffic sign:

stop to take a picture.  Who can resist poppies & Angel's trumpets.  Brugmansia, even the word is lush.  Who can resist pendulous flowers with no spine with no fruit.  Speaking of fruit, this season's strawberries (so far) are so near and so luscious.  Yield to them as you yielded to pen & paper this morning.

Poisonous

 Brugmansia.

Poisonous flowering plants.
Fragrant.  Known as angel's trumpets.

Beware of beauty & fragrance.
Beware of what you place in your mouth.
Beware of what you put to paper.
But take it all in -- hungerly.
& listen
to your ear
to your mouth.