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Published In: Flora Caroliniana, secundum . . . 92. 1788. (Fl. Carol.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 9/1/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


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3. Lysimachia lanceolata Walter

L. lanceolata var. angustifolia (Lam.) A. Gray

L. angustifolia Lam.

L. heterophylla Michx.

Steironema lanceolatum (Walter) A. Gray

Pl. 509 c, d; Map 2323

Plants with elongate, slender rhizomes. Stems 20–80 cm long, relatively slender (1–2 mm in diameter at the base), erect or strongly ascending, usually short-branched above the midpoint, glabrous or minutely glandular-hairy around the upper nodes. Basal and lower stem leaves often at least partially persistent at flowering, smaller than the median stem leaves. Stem leaves opposite, the lowermost ones usually with a relatively well-defined petiole 0.5–1.5 cm long, the petioles progressively shorter and less well-defined toward the stem tip, the uppermost leaves often appearing essentially sessile, when present, the petiole somewhat flattened, narrowly winged, the margins pubescent with long, spreading hairs below the midpoint, the pubescence sparse or absent toward the tip. Leaf blades 3–14 cm long, 0.7–2.0 cm wide, sometimes more or less folded lengthwise along the midvein, those of the lowermost leaves ovate to narrowly obovate or elliptic-lanceolate, becoming progressively narrower toward the stem tip, the uppermost leaf blades often linear to narrowly lanceolate, the bases accordingly rounded to angled or tapered, angled or somewhat tapered to a sharply pointed tip, the margins entire or more commonly roughened with minute papillae, the surfaces lacking gland dots, not punctate, glabrous, the upper surface green to dark green, the undersurface light green; secondary veins evident. Inflorescences axillary from the uppermost nodes, of solitary flowers, the flower stalks 2.0–4.5 cm long, glabrous. Calyces mostly 5-lobed, the lobes 4–7 mm long, lanceolate, not gland-dotted or punctate, usually with 1–3 faint veins. Corollas mostly 5-lobed, the lobes 5–10 mm long, obovate to oblong-obovate, broadly rounded or truncate but usually with a minute to somewhat elongate (tail-like) sharp point at the tip, the margins sometimes somewhat uneven or irregularly toothed, yellow, densely glandular and with reddish markings on the upper surface toward the base, lacking purple spots or lines. Stamens shorter than the corollas, the filaments 2–3 mm long, not fused into a basal tube, glandular-hairy. Staminodes alternating with the stamens, slender or somewhat broadened toward the base. Styles 3–4 mm long. Fruits 3.0–4.5 mm long, broadly ovoid to globose. Seeds 1.2–1.8 mm long, irregularly elliptic, oblong, or rhombic in outline, triangular in cross-section, dark brown to black. 2n=34. May–August.

Scattered nearly throughout the state, but apparently absent from the western half of the Glaciated Plains Division (eastern U.S. west to Iowa and Texas; Canada). Banks of streams, rivers, and spring branches, margins of ponds, lakes, and sinkhole ponds, acid seeps, bottomland forests, mesic upland forests, bottomland prairies, upland prairies, sand prairies, and glades; also pastures, railroads, and roadsides.

Lysimachia lanceolata is recognized by its short stature, thin stems, stolons, dimorphic leaves with the lower leaves persistent at flowering, and pale lower leaf surfaces. It typically occurs in drier habitats than does L. hybrida, but can grow in wetter habitats.



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