Lysimachia tonsa (Alph.Wood) Alph.Wood ex R.Knuth

Southern yellow loosestrife (en)

Species

Angiosperms > Ericales > Primulaceae > Lysimachia

Characteristics

Stems erect, simple or branched distally, 3-7 dm, stipitate-glandular or pubescent; rhi-zomes slender to thickened (sometimes absent); bulblets absent. Leaves opposite; petiole 0.5-4.5 cm, ciliate proximally near node, cilia 0.2-0.7 (-1.2) mm; blade lanceolate to ovate, 3-9 × (0.8-) 1-4.5 cm, base truncate, rounded, or cuneate, decurrent, margins entire or slightly sinuate, plane, sometimes obscurely ciliolate (rarely stipitate-glandular), apex acute to acuminate, surfaces not punctate, glabrous; venation pinnate-arcuate. Inflorescences axillary in distal leaves, solitary flowers or verticils. Pedicels 0.8-4 cm, stipitate-glandular at least distally. Flowers: sepals 5, calyx not streaked, 2.5-7.5 mm, glandular proximally or glabrous, lobes ovate to lanceolate, margins somewhat thickened; petals 5, corolla yellow, often with reddish base, not streaked, rotate, 6-12 mm, lobes with margins usually entire or sometimes erose distally, apex apiculate, stipitate-glandular adaxially; filaments distinct or nearly so, shorter than corolla; staminodes 0.6-1 mm. Capsules 3.5-5.8 mm, not punctate, glabrous. 2n = 34, 102.
More
Much like no. 1 [Lysimachia ciliata L.], but the rhizome very short and freely rooting, scarcely more than a mere crown; lvs mostly ovate, the larger 4–8 × 1.5–3.5 cm, the long petiole not ciliate, or ciliate only at the very base; 2n=34, 102. Dry, upland woods, mostly in the mts.; Ky. and w. Va. to Ga. and n. Ala. Late May–Aug. (Steironema intermedium Kearney, not Janka)
Life form perennial
Growth form herb
Growth support -
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
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Mature height (meter) -
Root system rhizome
Rooting depth (meter) -
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Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
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Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 30 - 90
Germination temperacture (C°) 12 - 18
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Optimum temperature (C°) -
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Distribution

Lysimachia tonsa world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:701395-1
WFO ID wfo-0001105348
COL ID 6R32C
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Steironema intermedium Lysimachia tonsa Steironema tonsum Lysimachia ciliata var. tonsa Steironema tonsum var. simplex Lysimachia tonsa var. simplex