Dante Gabriel Rossett's Self Portrait
https://www.npg.org.uk/collections/search/portrait/mw05462/Dante-Gabriel-Rossetti
In this self-portrait, housed at the United States National Portrait Gallery, Rossetti depicts himself as a young man. You can see how long his hair is here—it nearly reaches his shoulders—which is why the speaker could have been a woman but it is equally as possible that the speaker is a man, and possibly Rossetti himself.
Don't Be a Sap—The Guardian
This is a Guardian article about the hidden dangers of the woodspurge and its cultural significance. It's a good read if you want to learn more about this fascinating plant.
"The Woodspurge" poem text
https://www.poetryfoundation.org/poems/45027/the-woodspurge
Complete text of the poem "The Woodspurge" at the Poetry Foundation's website.
Listen to "The Woodspurge" being read aloud
https://www.poemhunter.com/poem/the-woodspurge/
Listen to "The Woodspurge" being read aloud over at poemhunter.com