European speedwell (Veronica beccabunga)

Common Names: Brooklime

Description:

European speedwell (Veronica beccabunga), also called brooklime, is a low-growing perennial wildflower native to Europe, the Middle East, and northern and western Asia [1]. It grows along the muddy edges of streams, ditches, and ponds, where its creeping stems form dense mats that can spread beyond where it was originally planted [2]. It was introduced to North America in the late 1800s, likely carried in the solid ballast of ocean-going ships, and MISIN tracks it because it can crowd waterways once established [2].

Habit:

European speedwell is a low, creeping plant with thick, hollow, fleshy stems that trail along mud or shallow water and root wherever a stem touches down, sending up short flowering shoots [3][4]. Look for it from late spring through summer, when it's topped with small blue flowers with a white center, growing in pairs from the base of the leaves [3][5]. Check the muddy, shaded edges of slow streams, ditches, and ponds ? this plant favors cool, oxygen-rich water and often grows right alongside its native look-alikes [3][6].

At-a-glance cues:

1. Thick, hollow, hairless stems that creep along the mud and root at the leaf joints [3]
2. Rounded to oval leaves, about half an inch to just over an inch long, on short stalks, with small forward-pointing teeth along the edges [3]
3. Small blue flowers with a white center, growing in pairs from where each leaf meets the stem [3][4]
4. Found at the muddy, shaded edges of streams, ditches, and ponds rather than out in open water [2][6]

Leaves:

1. Arrangement: opposite, two leaves per node [3]
2. Type: simple, undivided [3]
3. Shape: rounded to oval or oblong, broadest above the middle, with a rounded tip [3]
4. Margin: edged with small, forward-pointing to rounded teeth [3]
5. Surface: hairless [5]
6. Size: about half an inch to just over an inch long, on a short stalk [3][4]

Stems:

1. Habit: herbaceous, creeping to ascending, rooting at the leaf joints [3]
2. Texture: thick, fleshy, and hollow [5]
3. Color: green to purple-brown [5]
4. Hairs: hairless between the leaf joints [3]
5. Cross-section: round [3]

Flowers:

1. Color: blue with a white center, occasionally pink [3][4]
2. Shape: small, four to five petals fused at the base [3]
3. Arrangement: paired stalks rising from where each leaf meets the stem [3]
4. Bloom time: May through September [5]

Fruit and seeds:

1. Fruit type: small, dry capsule [3]
2. Shape: flattened, with two ribs, splitting into two sections when ripe [3]
3. Seeds: numerous small seeds released when the capsule splits open [3]
4. Dispersal: seeds and rooted stem fragments both spread in moving water [4]

Habitat:

European speedwell is native to Europe, the Middle East, and northern and western Asia [1]. In North America it was first recorded in the late 1800s and has since established across at least 16 states, more commonly in the Great Lakes and Mid-Atlantic regions, with Michigan among its earliest documented sites [2]. It grows on the muddy margins of brooks, rivers, ponds, and lakes, favoring cold, oxygen-rich, flowing water over still water, though it can tolerate periods of drying along a shoreline or in a drawn-down ditch [2][6]. It has now been recorded reproducing and overwintering in all five Great Lakes basins [6][7].

Reproduction:

European speedwell spreads two ways, and a homeowner is most likely to notice the first: any broken piece of stem that lands in mud or shallow water can root at its leaf joints and start a new patch, so pulling up a handful and leaving fragments behind can actually spread it further downstream or across a pond [4]. The plant also produces seed from its blue summer flowers, in small capsules that split open and release many tiny seeds into the water [3][4]. Once established, it overwinters and keeps spreading from both seed and rooted fragments year after year, which is part of why it now turns up across every one of the Great Lakes [6]. Because fragments re-root so readily, the best control window is early in the season, before the plant has built up the dense mats and long trailing stems that are hardest to remove cleanly [3][4].

Impact and Damage:

For homeowners, European speedwell is mainly a nuisance in garden ponds, water gardens, and drainage ditches rather than a documented health risk ? it isn't flagged for skin irritation or toxicity to people or pets in the sources reviewed for this factsheet. Its creeping, rooting stems can quickly blanket a small pond margin or ditch, crowding out other plants you may have placed there [2].

For natural area stewards, the picture is more mixed than the plant's reputation suggests. It's capable of forming large, single-species mats that can locally crowd out other streamside and wetland plants, especially on disturbed, muddy margins [2][6]. But a 2021 peer-reviewed review of competition among nonindigenous aquatic plants in the Great Lakes did not rank European speedwell among the species causing the most significant or noticeable stress to native plant communities, and federal researchers note that its broader environmental impact is still not well studied [6][8]. In short: watch it, but it isn't shown ? at least not yet ? to be among the region's most damaging aquatic invaders.

Similar species:

A handful of other wetland plants are easily mistaken for European speedwell, especially where they grow together at the same muddy stream edge.

American brooklime (Veronica americana) is the native look-alike most often confused with it. The surest way to tell them apart is the leaves: American brooklime's leaves are narrower and widest near the base with a pointed tip, while European speedwell's leaves are broadest above the middle with a rounded tip. Looking closely at a flower helps too ? American brooklime's style (the thin stalk at the flower's center) runs slightly longer than European speedwell's [9].

Water speedwell (Veronica anagallis-aquatica) grows in the same kind of wet ground but lacks European speedwell's short leaf stalks ? its leaves attach directly to the stem instead [10].

Sessile water-speedwell (Veronica catenata) is another stream-margin look-alike that also lacks a leaf stalk, and can be told apart by its narrower leaves and flowers that run pale pink to white rather than solid blue [11].

Watercress (Nasturtium officinale) often grows right alongside European speedwell in the same streams and ditches, which leads to mix-ups at a glance. A closer look gives it away: its leaves are divided into several leaflets rather than being a single simple leaf, and its flowers are white, not blue [12].

Monitoring and rapid response:

Signs to watch for:

1. Mats of thick, hollow, creeping stems with rounded, paired leaves spreading along the muddy edge of a pond, ditch, or slow stream [3]
2. Small blue, white-centered flowers in pairs along the stem from late spring through summer [3][5]
3. New patches appearing downstream or across a pond after mowing, dredging, or other disturbance that could have carried stem fragments [4]

What you can do:

1. Hand-pull small patches from garden ponds or ditches, working from the outer edge inward, and pull the entire rooted stem rather than snapping off just the top growth [3][4]
2. Bag and remove every fragment rather than tossing it on the bank or back into the water ? broken stems root readily wherever they land [4]
3. Do this early in the growing season, before the plant builds up the dense, tangled mats that make later removal harder and messier [4]
4. Natural area crews managing a stream or wetland should prioritize small, newly established patches before they knit into larger mats, and plan on multiple visits in a season, since any fragments missed on the first pass can regrow [4][6]

When to call a professional:

1. Dense mats covering a significant stretch of stream, ditch, or wetland margin
2. Sites where hand removal risks disturbing sensitive stream banks, fish habitat, or other wetland vegetation
3. Aquatic or right-of-way situations where a coordinated removal plan and proper disposal of plant material are needed
4. For chemical control options, contact a licensed applicator or your local cooperative extension office.

Report sightings to MISIN. Help track this species' spread by submitting observations through the MISIN web site or the MISIN mobile app (Android, iOS, Windows, and macOS). Photos at multiple angles paired with a precise GPS location are the most valuable data for confirming new occurrences and triggering rapid-response review.

Credits:

1. GBIF Backbone Taxonomy. Veronica beccabunga L. gbif.org
2. U.S. Geological Survey, Nonindigenous Aquatic Species Database. Veronica beccabunga (European speedwell), Species Profile. nas.er.usgs.gov
3. Native Plant Trust, Go Botany. Veronica beccabunga (European speedwell). gobotany.nativeplanttrust.org
4. EDDMapS. European speedwell (Veronica beccabunga L.). eddmaps.org
5. Botanical Society of Britain and Ireland (Fermanagh). Veronica beccabunga L., Brooklime. fermanagh.bsbi.org
6. U.S. Geological Survey, Nonindigenous Aquatic Species Database ? Great Lakes Region. Veronica beccabunga, Species Profile. nas.er.usgs.gov
7. Invasive Plant Atlas of the United States. European speedwell, rowan mountain ash: Veronica beccabunga. invasiveplantatlas.org
8. Sturtevant R, Lower E, Bartos A, Elgin A (2021). "A Review and Secondary Analysis of Competition-Related Impacts of Nonindigenous Aquatic Plants in the Laurentian Great Lakes." Plants 10(2):406. pmc.ncbi.nlm.nih.gov
9. Native Plant Trust, Go Botany. Veronica americana (American brooklime). gobotany.nativeplanttrust.org
10. Native Plant Trust, Go Botany. Veronica anagallis-aquatica (water speedwell). gobotany.nativeplanttrust.org
11. Native Plant Trust, Go Botany. Veronica catenata (sessile water-speedwell). gobotany.nativeplanttrust.org
12. Native Plant Trust, Go Botany. Nasturtium officinale (watercress). gobotany.nativeplanttrust.org

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