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blue speedwell, blue water speedwell, brook pimpernel, water pimpernel, water speedwell

Habit Annuals or perennials.
Stems

erect or prostrate basally, (20–)30–100(–170) cm, usually thick-fleshy, glabrous.

Leaves

petiole 0–2(–8) mm (basal lateral branches usually distinctly petiolate to 8 mm) proximally, 0 mm distally;

blade (of proximal leaves) ovate, elliptic, or oblong, (15–)30–80(–145) × (7–)10–30(–45) mm, 1.5–3 times as long as wide, base obtuse proximally to cordate-amplexicaul in middle and ± cuneate distally, margins ± serrulate or denticulate, apex acute, surfaces glabrous, rarely glandular-hairy.

Racemes

6–25, axillary, 50–100(–150) mm, 5–10 mm diam., (20–)30–40(–60)-flowered, axis glabrous, rarely glandular-hairy;

bracts linear to lanceolate, 2–5 mm, apex acute.

Pedicels

suberect or arcuate-erect to subpatent, curved upwards in fruit, 3–7(–10) mm, longer than subtending bracts, glabrous or hairy.

Flowers

calyx lobes 2–3 mm, apex acute, glabrous, rarely hairy;

corolla lavender to pale blue, rarely pale lilac, (4–)6–8 mm diam.;

stamens 3–3.5 mm;

style 1.5–2.5 mm.

Capsules

slightly compressed in cross section, globular, (2.5–)3–3.5(–4) × 2.5–3.2(–4) mm, apex rounded or ± emarginate, glabrous or sparsely short glandular-hairy.

Seeds

40–77, yellow-brown, ellipsoid to subglobular, planoconvex, (0.3–)0.5–0.7 × 0.3–0.5 mm, 0.2–0.3 mm thick, smooth.

2n

= 36.

Veronica anagallis-aquatica

Phenology Flowering Mar–Sep(–Nov).
Habitat Stream margins, ditches, banks, springs, swamps, wet meadows.
Elevation 0–4000 m. [0–13100 ft.]
Discussion

Veronica anagallis-aquatica is widespread. It is not clear whether it is native to the flora area; it is certainly introduced in some states and commonly dispersed by human activity. The species varies with water availability. It is frequently confused with V. catenata. Ecological differences (see discussion under 15. V. catenata) may suggest that V. anagallis-aquatica does not occur in most parts of Canada and Alaska from which the species is reported but is present in some states excluded from the distribution area due to the lack of herbarium specimens seen (for example, Alabama, Arkansas, Idaho, Louisiana, Maryland, Massachusetts, Mississippi, South Carolina, and Vermont). Hybrids are frequent in Europe (V. ×lackschewitzkii J. Keller) and have been reported for California and Nebraska (L. R. Heckard and P. Rubtzoff 1977). The sterile hybrids never form capsules and bear relatively long inflorescences. Another closely related species, V. anagalloides Gussone (= V. salina Schur), is not present in North America.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Distribution
from FNA
AZ; CA; CO; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; ME; MI; MO; MT; NC; ND; NE; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SD; TN; TX; UT; VA; WA; WI; WV; WY; AB; BC; ON; Eurasia; Africa; Atlantic Islands [Introduced in North America; likely introduced also in Mexico, Central America, South America]
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[BONAP county map]
Parent taxa Plantaginaceae > Veronica
Sibling taxa
V. agrestis, V. alpina, V. americana, V. argute-serrata, V. arvensis, V. beccabunga, V. biloba, V. catenata, V. chamaedrys, V. copelandii, V. cusickii, V. cymbalaria, V. dillenii, V. filiformis, V. fruticans, V. grandiflora, V. hederifolia, V. longifolia, V. officinalis, V. peregrina, V. persica, V. polita, V. scutellata, V. serpyllifolia, V. spicata, V. stelleri, V. sublobata, V. teucrium, V. triloba, V. triphyllos, V. undulata, V. verna, V. wormskjoldii
Synonyms V. anagallis-aquatica var. terrea, V. brittonii, V. comosa, V. glandifera, V. micromera
Name authority Linnaeus: Sp. Pl. 1: 12. (1753)
Source Flora of North America vol. 17, p. 313.
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