Tufted loosestrife
Lysimachia thyrsiflora · Aquatic plants
Whole plant · Photo: Сергей / CC0
Also called Water loosestrife
How to identify Tufted loosestrife
- Opposite lance shaped leaves with black dots
- Dense round yellow flower clusters at leaf bases
- Stems 1 to 2 feet
- Rhizomes
Similar plants
Garden yellow loosestrife has larger flowers at the top; purple loosestrife has magenta spikes.
Growth profile
| Growing season | Shoots in spring, flowers June and July and rhizomes overwinter. |
|---|---|
| Starts growing | About 50 F soil |
| Light | Full sun to part shade |
| Depth | Moist shoreline to about 1 foot of water |
| How it spreads | Rhizomes and seeds |
| Habitat | Marshes, bogs, pond edges and shallow water. |
Why it matters in a lake
Native relative of the invasive yellow loosestrife.
Where it is found
- Idaho: Occasional
- Oregon: Occasional
- Wyoming: Occasional
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Ericales |
| Family | Primulaceae |
| Scientific name | Lysimachia thyrsiflora |
Broadleaf cattail
Hardstem bulrush
Reed canarygrass
Purple loosestrife
Soft rush
Yellow flag iris
Broadleaf arrowhead
Western water hemlock
Beaked sedge
Baltic rushNeed a hand?
Is it taking over your lake?
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Idaho / Wyoming (208) 501-4531Oregon (541) 280-0596