Veronica dillenii |
Veronica agrestis |
|
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Dillenius' speedwell |
field speedwell, green field speedwell, green procumbent speedwell, véronique agreste |
|
Habit | Annuals. | Annuals. |
Stems | erect to ascending, (8–)10–20(–40) cm, glandular- and eglandular-hairy. |
creeping to decumbent, 5–25 cm, hairy. |
Leaves | blade lanceolate to ovate, 7–19(–21) × (3–)5–12 mm, 1–2 times as long as wide, base cuneate, margins (proximal) crenate-dentate or (distal) ±palmatifid, lobes 3–7+, apex of central lobe obtuse, lateral ± acute, surfaces glandular- and eglandular-hairy. |
blade elliptic-ovate to oblong, (6–)8–16(–19) × (3–)4–10(–13) mm, base truncate, margins serrate, teeth 4–6(–8) per side, apex obtuse to acute, abaxial surface ± more densely hairy than adaxial. |
Racemes | 1, terminal, 60–180 mm, 15–50(–120)-flowered, axis eglandular- and glandular-hairy; proximal bracts similar to leaves, distal ones linear-lanceolate, 3–5 mm. |
1–5, terminal, 50–250 mm, 5–15-flowered, axis eglandular-hairy, sometimes glandular-hairy; bracts elliptic-ovate to oblong, (6–)9–16(–19) mm. |
Pedicels | erect, 2–4(–5) mm, shorter than subtending bract, length 1/2–1 times calyx, eglandular- and glandular-hairy. |
deflexed, (5–)6–10(–15) mm, ± shorter than subtending bracts, densely eglandular- and, sometimes, glandular-hairy distally. |
Flowers | calyx lobes 3.5–6 mm, apex acute, eglandular- and glandular-hairy; corolla deep blue, 4–6 mm diam.; stamens 0.8–1.5 mm; style 0.8–1.5 mm, stigma violet. |
calyx lobes linear-lanceolate, (5–)6–7 mm, 2.2–2.6 mm wide, apex rounded, sparsely eglandular- or glandular-hairy; corolla white or pale pinkish or pale blue, 4–5(–6) mm diam.; stamens 0.5–1 mm; style (0.6–)0.9–1.1(–1.2) mm. |
Capsules | compressed in cross section, narrowly obcordiform, 3.5–4.5 × 4–6 mm, apex emarginate, angle of sinus ca. 90°, ciliate with glandular and eglandular hairs. |
± compressed in cross section, ± subglobular, 3.5–4.5(–4.7) × 4.5–6(–6.3) mm, apex emarginate, sparsely glandular-hairy. |
Seeds | 10–28, yellowish, ellipsoid, flat, 0.9–1.6 × 0.7–1.3 mm, 0.2–0.3 mm thick, smooth. |
6–14, yellow to ochre, globular, cymbiform, 1.3–2.1 × 1–1.6 mm, 0.6–1.1 mm thick, strongly rugose (transversely ribbed). |
2n | = 16 (Eurasia). |
= 28 (Europe). |
Veronica dillenii |
Veronica agrestis |
|
Phenology | Flowering (Mar–)Apr–Jul. | Flowering May–Oct. |
Habitat | Open pine and oak forests, rocky, dry, sandy slopes. | Light, noncalcareous, moist soils, gravelly soils. |
Elevation | 500–2200 m. (1600–7200 ft.) | (0–)300–800 m. ((0–)1000–2600 ft.) |
Distribution |
IL; IN; MI; NY; VA; WI; Eurasia [Introduced in North America] |
DC; FL; IL; LA; MA; NY; PA; TX; VT; NF; NS; QC; Europe [Introduced in North America]
|
Discussion | Veronica dillenii is closely related to V. verna but with larger flowers; it may have been overlooked and may be distributed more widely. Most herbarium specimens of V. dillenii blacken when dry due to the presence of aucubin, which distinguishes them from V. verna. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Veronica agrestis is similar to the more frequent V. persica and probably frequently overlooked and to be expected elsewhere. However, it should be noted that it is less common than V. persica or V. polita and always in more humid habitats. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 318. | FNA vol. 17, p. 320. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Crantz: Stirp. Austr. Fasc. ed. 2, 2: 352. (1769) | Linnaeus: Sp. Pl. 1: 13. (1753) |
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