To him who keeps an Orchis' heart — Swamp-Pink

Swamp-pink, also called wild honeysuckle, inspired Dickinson's thought on a man who owns an Orchis, beautiful but frail, heart. To escalate this poem, a list of word's various usages will be helpful: swamp (marshy land, muddy situation), pink (color, progressive, contracted, diminutive), June (a blooming season).

To him who keeps an Orchis' heart－
The swamps are pink with June.

(F.31/J.22)

[1] heart:: the strength, fertility of a land _{(OED 21a)}. Orchis' heart:: one who owns a land suitable for Orchis.
[2] swamps, pink:: a hint on swamp-pink, wild honeysuckle. June:: swamp-pinks blossom in June. June-beetle is a possible answer, but swamps in its plural form makes swamp-pinks more appropriate.

But with June comes the most exquisite of our New England wild-flowers, the arethuta, or swamp-pink, ─ The Atlantic Monthly, Volume 5 (1860)

Swamp Pink . . . they are eagerly sought after, and form a conspicuous part of the decoration of the mantel-piece, in its season, the month of June. The color is commonly a fine pink. ─ New Book of Flowers (1866)