Lysimachia lanceolata |
Lysimachia radicans |
|
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lance-leaf loosestrife |
trailing loosestrife, trailing yellow loosestrife |
|
Stems | erect, simple or sometimes branched distally, 1–10 dm, glabrous (rarely sparsely stipitate-glandular or pubescent near nodes); rhizomes slender; bulblets absent. |
reclining, trailing, or decumbent (sometimes rooting at nodes), simple or branched, 3–10.5 dm, glabrous or sparsely stipitate-glandular; rhizomes ± slender; bulblets absent. |
Leaves | opposite or whorled near stem apex, dimorphic; distal petioles absent or 0.1–0.7 cm, proximal 0.3–2(–3.5) cm, ciliate proximally, cilia 0.3–1.2(–2) mm; distal blades narrowly elliptic to elliptic-lanceolate or linear-lanceolate, proximal blades broadly elliptic or lanceolate, distal 3–18 × 0.2–1.6 cm, proximal 2–5 × 0.6–1.8 cm, bases of distal leaves cuneate, decurrent, bases of proximal leaves rounded to obtuse or cuneate, decurrent, margins entire (rarely serrulate), plane, ciliolate proximally, apex rounded to acute or acuminate, surfaces not punctate, glabrous; venation pinnate-arcuate. |
opposite; petiole 0.5–4 cm, ciliate proximally, cilia 0.2–0.9 mm; blade lanceolate to ovate-lanceolate, 2–10 × 0.5–3 cm, base rounded or obtuse to cuneate, decurrent, margins entire, plane, ciliolate (or rarely finely papillate or sometimes eciliolate), apex acute to acuminate, surfaces not punctate, glabrous; venation pinnate-arcuate. |
Inflorescences | axillary, solitary flowers. |
axillary, solitary flowers (rarely leafy racemes). |
Pedicels | 1–5 cm, glabrous to sparsely stipitate-glandular (rarely pubescent). |
1–3 cm, glabrous. |
Flowers | sepals 5, calyx not streaked, 3.5–8(–10) mm, glabrous or stipitate-glandular, lobes narrowly lanceolate to ovate, margins thin; petals 5, corolla yellow, sometimes with slightly reddish base, not streaked, rotate, 4–10 mm, lobes with margins slightly erose apically, apex apiculate or mucronate, sparsely stipitate-glandular adaxially; filaments distinct or nearly so, shorter than corolla; staminodes 0.7–1 mm. |
sepals 5, calyx sparsely or not streaked with resin canals, 2–5 mm, glabrous, lobes lanceolate, margins thin; petals 5, corolla yellow with reddish base, sparsely streaked with scattered dark resin canals (sometimes obscure), rotate, 2–6 mm. |
Capsules | 2–5 mm, usually not punctate, glabrous or slightly stipitate-glandular distally. |
2.5–5 mm, not punctate, glabrous. |
Lobes | with margins entire or erose apically, apex apiculate, stipitate-glandular adaxially; filaments apparently distinct or connate at very base, shorter than corolla; staminodes 0.4–1 mm. |
|
2n | = 34. |
= 34. |
Lysimachia lanceolata |
Lysimachia radicans |
|
Phenology | Flowering summer–fall. | Flowering summer. |
Habitat | Moist roadsides, mixed and deciduous forests, edges of wet meadows, lake shores, swales in open prairie, rocky sites | Cypress and tupelo swamps, flood plains, stream banks, marshes |
Elevation | 0-1600 m (0-5200 ft) | 0-200 m (0-700 ft) |
Distribution |
AL; AR; DC; DE; FL; GA; IA; IL; IN; KY; LA; MD; MI; MO; MS; NC; ND; NJ; OH; OK; PA; SC; TN; TX; VA; WI; WV; MB; ON
|
AL; AR; FL; IL; KY; LA; MD; MO; MS; OK; TN; TX; VA |
Discussion | Reports of Lysimachia lanceolata from Connecticut and Maine were based on specimens of L. hybrida initially identified as L. lanceolata subsp. hybrida. V. J. Coffey and S. B. Jones (1980), using garden studies, concluded that this species differed from the similar Lysimachia hybrida in some features, mostly dealing with leaf shape and amount of marginal cilia. Herbarium specimens examined by me showed much more overlap in these characters; clearly these two species need further work. Coffey and Jones also reported, interestingly, that L. lanceolata was less susceptible to aphid infestation than L. hybrida. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 8, p. 313. | FNA vol. 8, p. 316. |
Parent taxa | Myrsinaceae > Lysimachia | Myrsinaceae > Lysimachia |
Sibling taxa | ||
Synonyms | L. angustifolia, L. heterophylla, L. lanceolata var. angustifolia, Nummularia lanceolata, Steironema heterophyllum, Steironema lanceolatum | Nummularia radicans, Steironema radicans |
Name authority | Walter: Fl. Carol., 92. 1788 , | Hooker: Compan. Bot. Mag. 1: 177. 1836 , |
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