- To +/-1m tall, erect, from fleshy rhizomes, herbaceous, branching, glabrous, 4-angled, slightly winged in upper portions by decurrent leaf tissue.
- Opposite, decussate, linear, sessile, entire, deep shiny green, with single prominent midrib, acute, glabrous, to +/-13cm long, +/-7mm broad. Margins revolute and often with a few cilia near base.
- Axillary pedicillate flowers near the tips of the stems. The internodes are very short in the upper portions of the plant and create a whorled appearance. Pedicels glabrous, to 2.5cm long. Flowers nodding.
- Corolla yellow, to 2.5cm broad, 4-lobed. Lobes rotund to ovate, apiculate, slightly lacerate to erose on apical margins, glabrous externally, densely glandular near base internally. Corolla tube very short, to 2mm long. Stamens 5, erect, adnate at apex of corolla tube, opposite the corolla lobes. Filaments compressed slightly, white, glandular pubescent, to 4mm long. Anthers orange-brown, 2.5-3mm long. Style whitish green, glabrous, 5mm long. Ovary superior, subglobose, green, glabrous, 5-valved, 1.2mm in diameter. Placentation free-central. Locules (seeds) many. Sepals 5, spreading, to 7mm long, 2.5mm broad, glabrous, ovate-lanceolate, entire, green, acute to acuminate.
- This species can be found in the central portions of Missouri. The plant is easy to ID in the field because of its thin, opposite leaves, its falsely-whorled flowers, and the wet habitat it prefers.
also prefers calcareous soils. The flowers can sometimes be white in color.
Traditionally the leaves of this plant were dried and made into a bland tea which was used to treat feminine problems and kidney troubles.
Photographs taken along the shores of the Current River, Shannon County, MO., 7-6-03.
Linnaeus, Sp. Pl. 1: 147. 1753.
Whorled loosestrife, cross-wort, lysimaque quatre feuilles
erect, usually simple, 3-10 dm, usually sparsely pubescent, at least at nodes (or glabrous); rhizomes slender to somewhat thickened; bulblets absent.
whorled; petiole absent or 0.1-0.3 cm, eciliate; blade elliptic to lanceolate or ovate, 3-12 : 0.8-3.5(-4.5) cm, base cuneate or rounded, slightly decurrent, margins entire, plane, glabrous or sometimes sparsely pubescent, apex acuminate or acute (rarely obtuse), surfaces densely to sparsely punctate, pubescent at least along abaxial veins and margins; venation pinnate-arcuate.
axillary in leaves (distalmost axils sometimes without flowers), solitary flowers.
1.5-3 cm, sparsely pubescent.
sepals 5, calyx streaked with dark resin canals, 3-6 mm, slightly stipitate-glandular, lobes lanceolate, margins thin; petals 5, corolla yellow with reddish base and, sometimes, margins, streaked with black or maroon resin canals, rotate, 5-8 mm, lobes with margins entire, apex acute to rounded, stipitate-glandular adaxially; filaments connate ca. 1.7 mm, shorter than corolla; staminodes absent.
3-3.5 mm, sometimes dark-punctate, glabrous.
Using these photos:
A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the
link under the thumbnail. See also:
Using the Photos in CalPhotos