Veronica arvensis |
Veronica triloba |
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corn speedwell, speedwell, véronique des champs, wall speedwell |
trilobed speedwell |
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Habit | Annuals. | Annuals. |
Stems | erect to ascending, 1–30(–40) cm, glandular- or eglandular-hairy. |
decumbent, (5–)10–30 cm, ± eglandular-hairy. |
Leaves | in 3–6 pairs per stem; blade oblong to broadly ovate, (2–)5–14(–35) × (2–)3–10(–18) mm, 2.5 times as long as wide, base truncate, margins crenate-serrate, apex obtuse to rounded, surfaces sparsely eglandular-hairy, rarely also glandular-hairy. |
blade broadly ovate to suborbiculate, 3(–5)-lobed, central lobe 1/4–1/2 times length of whole leaf, (3–)5–10(–15) × (4–)6–12(–18) mm, ± fleshy, base truncate to subcordate, margins 3(–5)-lobed, apex acute, surfaces sparsely eglandular-hairy. |
Racemes | 1(–3), terminal, 20–150 mm, (5–)15–40(–60)-flowered, axis densely eglandular- and glandular-hairy; bracts linear-oblong, (3.5–)4–6(–10) mm. |
1–10, terminal, (50–)100–300 mm, 5–20-flowered, axis sparsely eglandular-hairy; bracts broadly ovate to suborbiculate, 3(–5)-lobed, (3–)5–10(–15) mm. |
Pedicels | erect, 0–4 mm, shorter than subtending bract, densely eglandular- and glandular-hairy. |
patent, deflexed in fruit, (2–)4–8(–10) mm, shorter than subtending bract, length 1–2 times calyx, glabrous abaxially, hairy adaxially. |
Flowers | calyx lobes (2–)3.5–5(–6) mm, 0.8–2 mm wide, apex acute, glandular-hairy; corolla sky blue to intense blue, 2–4 mm diam.; stamens 0.3–0.5 mm; style (0.2–)0.4–0.6(–1) mm. |
calyx lobes 4–5(–6) mm, apex acute, puberulent on abaxial surface, rarely glabrous, densely ciliate with 35–60 per side; corolla deep blue with white center, 3–5 mm diam.; stamens dark blue, length unknown; style 0.5–0.9(–1.1) mm. |
Capsules | compressed in cross section, obcordiform, 2–4 × 2.5–5 mm, apex markedly emarginate, glandular-ciliate, otherwise glabrous. |
± round in cross section, ovoid, 2.5–3(–3.5) × 4–5 mm, apex ± emarginate, glabrous. |
Seeds | 10–30, yellowish, ovoid, flat, 0.7–1.7 × 0.4–1 mm, 0.2–0.4 mm thick, rugose. |
(1–)4, dull yellowish brown, ellipsoid, often elongate-cuboidal, deeply urn-shaped (elaiosome inside), 2.2–2.8 × 1.5–2.2 mm, 1–1.4 mm thick, cristate to strongly rugose at margins. |
2n | = 16. |
= 18 (Eurasia). |
Veronica arvensis |
Veronica triloba |
|
Phenology | Flowering (Feb–)Mar–Jun(–Oct). | Flowering (Feb–)Mar–May(–Jun). |
Habitat | Disturbed sites, lawns, fields, open forests, scrub, grasslands, rocky sites, coasts. | Disturbed sites. |
Elevation | 0–2900 m. (0–9500 ft.) | 100–200 m. (300–700 ft.) |
Distribution |
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; PE; QC; YT; Atlantic Islands; Pacific Islands; Greenland; Africa; Eurasia; Australia [Introduced in North America; introduced also in Mexico, Central America]
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CA; OH; Europe (Balkans); Asia (Turkey) [Introduced in North America] |
Discussion | Veronica triloba is known in the flora area from three recent collections in California and Ohio; it is possibly more widespread than reported here. It is closely related to V. hederifolia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 17, p. 317. | FNA vol. 17, p. 316. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | V. hederifolia var. triloba | |
Name authority | Linnaeus: Sp. Pl. 1: 13. (1753) | (Opiz) Opiz: Naturalientausch 11: 467. (1826) |
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