Lysimachia thyrsiflora

Stems erect, simple, 3–8 dm, pubescent distally; rhizomes stout; bulblets absent. Leaves opposite to subopposite or whorled; petiole absent or 0.1–0.2(–0.4) cm, eciliate; blade lanceolate or linear-lanceolate to elliptic, 5–16 × 0.5–6 cm, base truncate to rounded or cuneate, not decurrent, margins entire, plane, eciliolate, apex acute to obtuse, surfaces punctate, glabrous or sometimes sparsely pubescent abaxially; venation pinnate. Inflorescences axillary, racemes, 1–3 cm. Pedicels 0.1–0.4 cm, stipitate-glandular or pubescent. Flowers: sepals 5–7(–9), calyx streaked with dark resin canals, 1–2.8 mm, glabrous, lobes narrowly lanceolate, margins thin; petals 5–7(–9), corolla light yellow, streaked with black or reddish-brown resin canals, somewhat funnelform, 3–7 mm, lobes with margins entire, apex rounded to acuminate, eglandular; filaments distinct or connate ca. 0.2 mm, nearly 2 times as long as corolla; staminodes absent (rarely staminodelike minute teeth present between fertile filaments). Capsules 2–3 mm, dark-punctate, glabrous. 2n = 40, 42, 54.

Phenology: Flowering spring–summer.
Habitat: Bogs, swamps, marshes, wet woods
Elevation: 0-2000 m

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Kans., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Utah, Vt., Wash., W.Va., Wis., Wyo., Eurasia.

Discussion

Lysimachia thyrsiflora is known to hybridize readily with 17. L. terrestris (see discussion under the latter).

Selected References

None.

Lower Taxa