Arethusa bulbosa


Sp. Pl. 2: 950. 1753

Treatment appears in FNA Volume 26. Treatment on page 597. Mentioned on page 594.
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Plants 2–40 cm. Leaves: blade 5–23 cm × 3–12 mm. Inflorescences: floral bracts 2, inconspicuous. Flowers pink to magenta, rarely white or bluish, gaping, large; sepals erect, narrowly oblanceolate to narrowly oblong, 20–55 × 3–9 mm; petals arcuate, 23–49 × 4–10 mm; lip obovate to oblong, arcuate to reflexed near middle, often obscurely 3-lobed, 19–35 ×10–19 mm; disc with crest of yellow lamellae and fleshy processes. Capsules erect, ovoid to ellipsoid, 15–25 mm. 2n = 40.

Phenology: Flowering Jun–Jul.
Habitat: Sphagnum bogs, coniferous swamps, calcareous treed to open fens, and moist, acid, sandy meadows
Elevation: 0–1100 m


V26 1219-distribution-map.jpg

Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask., Conn., Del., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., W.Va., Wis.


The occurrence of Arethusa bulbosa in Cook County, Illinois (F. Swink and G. S. Wilhelm 1994), and in Maryland are unconfirmed.



Lower Taxa

No lower taxa listed.