Flora of North America species comparison

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Veronica teucrium

large speedwell
Habit Perennials.
Stems

erect, rarely ascending, (15–)30–70(–100) cm, eglandular-hairy, hairs evenly distributed around stem.
Leaves

blade ovate or oblong-ovate, rarely lanceolate, (20–)30–55(–70) × (6–)15–25(–45) mm, 2–3(–4) times as long as wide, base ± cordate, margins dentate to serrate to crenate-incised, rarely subentire, apex acute, abaxial surface hairy, adaxial glabrous.
Racemes

2–4(–8), axillary, 60–150 mm, 50–150-flowered, axis hairy;

bracts linear-lanceolate to linear, 4–8(–14) mm.
Pedicels

erect, 3–7(–14) mm, equal to subtending bract, eglandular-hairy.
Flowers

calyx 5-lobed, abaxial lobes 3–4 mm, adaxial 1–1.5 mm, apex acute, glabrous or hairy;

corolla bright blue, rarely pinkish or white, (9–)12–18 mm diam.;

stamens 4.5–6 mm;

style 5–6 mm.
Capsules

± compressed to ± round in cross section, broadly obovoid or obcordiform, (3–)4–5.5 × (2.5–)3.5–5 mm, apex not deeply, narrowly emarginate, glabrous or sparsely hairy.
Seeds

(2–)8–18, brown, widely ellipsoid to widely obovoid, flat, 1.2–2.1 × 1–1.5 mm, 0.2–0.4 mm thick, smooth.
2n

= 48, 64 (Europe).

Veronica teucrium
Phenology Flowering May–Jul.
Habitat Dry meadows, forest edges, scrub, calcareous soils.
Elevation 0–1000 m. (0–3300 ft.)
Distribution
from FNA
CT; DC; IL; IN; MA; MD; ME; MI; MO; NH; NJ; NY; OH; PA; SD; VT; WI; NF; ON; QC; Europe [Introduced in North America]
Discussion

Veronica teucrium has often been considered an infraspecific taxon of V. austriaca; many records of V. teucrium have been reported under the name V. austriaca. The occurrence of V. austriaca in the narrow sense in the flora area could be neither supported nor excluded; it differs from V. teucrium mainly in distal leaves of the vegetative shoot linear and entire.

Related species have been introduced for horticultural reasons but apparently have not escaped. Veronica satureiifolia Poiteau & Turpin was reported from Missouri by G. Yatskievych [1999–2013; as V. scheereri (J.-P. Brandt) Holub] outside cultivation based on a single specimen and was similarly found in MIN but likely not naturalized. The name V. latifolia Linnaeus, which has at times been used for V. teucrium, is now considered ambiguous and should not be used (R. K. Brummitt 2007). Reports of V. teucrium in Saskatchewan have not been verified.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 322.
Parent taxa Plantaginaceae > Veronica
Sibling taxa
V. agrestis, V. alpina, V. americana, V. anagallis-aquatica, 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. triloba, V. triphyllos, V. undulata, V. verna, V. wormskjoldii
Synonyms V. austriaca subsp. teucrium, V. austriaca var. teucrium
Name authority Linnaeus: Sp. Pl. ed. 2, 1: 16. (1762)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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