Analysis of Deadly Nightshade

Tangle with my vines
They grow exceedingly long
They reach out and grasp
They do no harm
Silently sleeping I creep
Upon you in the dark
Slowly I awaken
You can see the daybreak
Look at my beauty
As I can cause death
The poison in my veins
Isn't it enough?
Trust in my aroma
The scent entwines
Delivery of my sleep
I still yet remain
Huddled in the masses
Of falling rain
Then you see me clearly
The shades of purple and black