Lysimachia lanceolata |
Lysimachia asperulifolia |
|
---|---|---|
lance-leaf loosestrife |
Carolina or rough-leaf yellow loosestrife, roughleaf 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. |
erect, usually simple or sparingly branched, 3–6.5 dm, stipitate-glandular, especially distally; rhizomes somewhat thickened and almost fleshy; 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. |
whorled; petiole absent; blade lanceolate, 2–5.5 × 0.8–2 cm, base rounded to truncate, not decurrent, margins entire, slightly revolute, eciliate, apex acute, surfaces dark-punctate, especially abaxially and/or apically (sometimes obscurely so), glabrous; venation palmate, main veins 3–5. |
Inflorescences | axillary, solitary flowers. |
mostly terminal, somewhat leafy racemes, 3–10 cm. |
Pedicels | 1–5 cm, glabrous to sparsely stipitate-glandular (rarely pubescent). |
0.4–2 cm, stipitate-glandular. |
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 streaked with dark resin canals, 3–6 mm, minutely stipitate-glandular, especially distally, lobes narrowly lanceolate, margins thin; petals 5, corolla yellow, streaked with reddish black resin canals, rotate, 6–9 mm, lobes with margins entire, apex acute to acuminate, stipitate-glandular; filaments connate 1–1.5 mm, shorter than corolla; staminodes absent. |
Capsules | 2–5 mm, usually not punctate, glabrous or slightly stipitate-glandular distally. |
3–4 mm, not punctate, glabrous. |
2n | = 34. |
= 42. |
Lysimachia lanceolata |
Lysimachia asperulifolia |
|
Phenology | Flowering summer–fall. | Flowering early summer. |
Habitat | Moist roadsides, mixed and deciduous forests, edges of wet meadows, lake shores, swales in open prairie, rocky sites | Swamp margins, wet pine savannas and pocosins |
Elevation | 0-1600 m (0-5200 ft) | 0-300 m (0-1000 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
|
NC; SC |
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.) |
The common name “rough-leaf yellow loosestrife” includes a misinterpretation of the specific epithet, which originally referred to the whorled leaves resembling those of some species of Asperula Linnaeus (Rubiaceae). Lysimachia asperulifolia is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 313. | FNA vol. 8, p. 310. |
Parent taxa | Myrsinaceae > Lysimachia | Myrsinaceae > Lysimachia |
Sibling taxa | ||
Synonyms | L. angustifolia, L. heterophylla, L. lanceolata var. angustifolia, Nummularia lanceolata, Steironema heterophyllum, Steironema lanceolatum | L. herbemontii |
Name authority | Walter: Fl. Carol., 92. 1788 , | Poiret: in J. Lamarck et al., Encycl., suppl. 3: 477. 1814 (as asperulaefolia) , |
Web links |