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Lysimachia thyrsiflora L.
TUFTED LOOSESTRIFE
Naumbergia thyrsiflora (L) Rchb

Life   Plantae   Dicotyledoneae   Primulaceae   Lysimachia

Lysimachia thyrsiflora
© Copyright Bobby Hattaway 2011 · 4
Lysimachia thyrsiflora

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Lysimachia thyrsiflora, plant and leaf and flower
© Kay Yatskievych, 2003 · 1
Lysimachia thyrsiflora, plant and leaf and flower

Associates · map
FamilyScientific name @ source (records)
Halictidae  Halictus ligatus @ BBSL (1)
Melittidae  Macropis nuda @ BBSL (13)
Mycosphaerellaceae  Ramularia lysimachiae @ BPI (9)

Septoria lysimachiae @ BPI (4)
Pucciniaceae  Puccinia caricina @ BPI (2)

Puccinia limosae @ BPI (16)

Uromyces acuminatus @ BPI (1)

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FNA | Family List | FNA Vol. 8 | Myrsinaceae | Lysimachia

18. Lysimachia thyrsiflora Linnaeus, Sp. Pl. 1: 147. 1753.

Swamp or tufted loosestrife, lysimaque thyrsiflore

Lysimachia capitata Pursh; L. capitellata Rafinesque; L. subcapitata Rafinesque; Lysimachusa thyrsiflora (Linnaeus) Pohl; Naumburgia thyrsiflora (Linnaeus) Reichenbach; Nummularia thyrsiflora (Linnaeus) Kuntze; Thyrsanthus palustris Schrank

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. 2 n = 40, 42, 54.

Flowering spring-summer. Bogs, swamps, marshes, wet woods; 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.

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

Updated: 2024-04-14 02:29:37 gmt
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