Saw some Green Arrow Arum (Peltandra virginica) that had unusual orange colored stems.
Closeup of the stem seen in the above photo. Some research on the Internet revealed the orange color on the Green Arums is the result of Rust Fungi (Uromyces caladii). The Rust Fungi is known to grow on another member of the Arum Family called Jack in the Pulpit.
The plant Rust can also be seen on the top of some Green Arum leaves.
A closeup view of the Rust Fungi.
Sunset on Dog River is another source of orange hues.