Two Plants to Identify -- One Tree; One Broadleaf

[roadrunner]

I have two plants, one of which is a tree the other a broadleaf; they are volunteers I'm trying to identify, any help would be appreciated.

This is a tree, it's about 10-12 ft (3 – 3.6 meters) tall; it's been growing 2-3 years. The trunk at the base is about 3 inches (7.62 cm) in diameter. It's just now starting to flower; I'll try and get more flower images if needed as the blooms start to heavily blossom in about a week. The leaves are somewhat small, roughly about an inch (25.4mm) long and about ½ that in width.

The Bark

 

[roadrunner]

Second Plant

This is a small broadleaf plant, it stands about 3 ft (1 meter) tall; it's been growing about 10 months. The leaves are between 3 – 4 inches (7.62 – 10 cm) long and the width is between 1 – 1.5 inches (2.5 – 3.8 cm). It's about to blossom, so I can get some more pics in about a week.

 

[roadrunner]

I can't get better pics of the flowers of the tree (^^^above^^^), but I've noticed that the flowers are very attractive to wasps, hoverflies and some native bees; which isn't surprising, since those pollinators tend to like small flowers, I've noticed.

However, the second plant above has flowered and I've got some pics below to hopefully help in ID'ing the plant; it may be some type of legume, judging by the flower.

 

[Twigs]

Looks like Crotalaria (Rattlebox)....toxic plant to man, birds, and animal. Can be Invasive!

 

[alp]

My friend, Jeanie, said one of them could be Coyote Bush or Baccharis pilularis male

 

[roadrunner]

Thank you Twigs and alp, you're both correct. Now I can try and decide to keep or not...

 

[Marck]

I largely concur with previous posts. The small tree is a male individual of Baccharis halimifolia, the Florida Groundsel-tree. Baccharis pilularis is a different species that only occurs in western North America. The yellow-flowered legume is a Crotalaria, probably C. retusa.