Sweet is the swamp with its secrets — Snake-Mouth

Boys and girls went to a swamp and saw a flower called snake-mouth. Enthralled by its evil beauty (actually its name) they hurried to home. Immature men and women beguiled by the serpent in Eden, the sweet swamp, get married in a hurry to build their homes.

Sweet is the swamp with its secrets, ¹
Until we meet a snake;
'Tis then we sigh for houses,
And our departure take

At that enthralling gallop ⁵
That only childhood knows.
A snake is summer's treason,
And guile is where it goes.

(F.1780/J.1740)

[1] Sweet, swamp, secrets:: sweet swamp like Eden with the secret of guile and sex.
[2] snake:: snake-mouth, or snake-mouth arethusa; it grows in wet land. meet a snake:: to be seduced by the serpent in Eden.
[3] sigh for houses:: to desire, long for houses, marriages and homes.
[4] departure take:: to start a new journey.
[5] gallop:: quick moves into marriage.
[6] childhood:: the immaturity.
[7] summer's treason:: the treason of Adam and Eve.
[8] guile:: the nature of Adam and Eve, of sex and marriage.

Snake-mouth Arethusa. A curious little plant, with a flesh-colored flower, in the form of a snake's head. Root fibrous. Stem erect, one flowered, rarely two flowered. ─ The Magazine of Horticulture (1835)

We must not leave the swamp until we have discovered other treasures. . . . (Snake-mouth Arethusa) Belonging to the same tribe, and standing at its side, we find the arethusa. It has a single purple flower, at the top of a stem rarely one foot in height. ─ The Horticulturist, Volume VI (1851)