Euphrasia tetraquetra

(Brébisson) Arrondeau

Bull. Soc. Polymath. Morbihan 1862: 96. 1863.

Common names: Maritime eyebright
WeedyIntroduced
Basionym: Euphrasia officinalis var. brébisson Fl. Normandie ed. 2, 183. 1849
Treatment appears in FNA Volume 17. Treatment on page 497. Mentioned on page 493.

Stems branched, sometimes simple, to 12(–18) cm; branches 1–3(–5), from middle and distal, sometimes basal, nodes; cauline internode lengths 0.8–1.5 times subtending leaves. Leaves: blade +/- ovate, 2–8(–11) mm, margins serrate-dentate, teeth 2 or 3(–6) pairs, apices subacute to acute. Inflorescences densely spicate, sometimes 4-angled, beginning at node 3–5(–7); bracts light to dark green, broader than leaves, ovate to obovate, length not more than 2 times width, (4–)5–7(–9) mm, glossy, surfaces glabrous or hairy and hairs eglandular bristles on veins, teeth 4 or 5 pairs, as long as or longer than wide, apices acute, sometimes aristate, sinuses between teeth acute. Flowers: calyx lobes straight, apex acute; corolla white, adaxial lip sometimes tinged lilac, 4–5 mm, abaxial lip exceeding adaxial. Capsules oblong, 3–6 mm, apex truncate. 2n = 44 (England).


Phenology: Flowering summer.
Habitat: Grassy and gravelly places, coastal.
Elevation: 0–200 m.

Distribution

Introduced; N.S., Ont., Que., Maine, n Europe.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Euphrasia tetraquetra"
Galina Gussarova +
(Brébisson) Arrondeau +
Euphrasia officinalis var. brébisson +
Maritime eyebright +
N.S. +, Ont. +, Que. +, Maine +  and n Europe. +
0–200 m. +
Grassy and gravelly places, coastal. +
Flowering summer. +
Bull. Soc. Polymath. Morbihan +
Weedy +  and Introduced +
Euphrasia tetraquetra +
Euphrasia +
species +