Cross Bill; Sweet William

Nobody but an imbecile
Mistakes Sweet William for Cross Bill:
And even I can scarcely claim,
The skill to make them look the same.
Some other shrubs and vines and trees,
Express emotion much like these,
You’ve seen the mad‑wort plant I guess,
And weeping willows and sigh‑press,
The passion‑flower, at its climax,
The glad‑iolus and the smile‑ax.