Euphrasia tetraquetra

(Brébisson) Arrondeau

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

Common names: Maritime eyebright
WeedyIntroduced
Basionyms: 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 moreorless 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.

"broader" is not a number.

... more about "Euphrasia tetraquetra"
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Acute (?) +, Aristate (?) +  and Subacute (?) +
Galina Gussarova +
(Brébisson) Arrondeau +
Euphrasia officinalis var. brébisson +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not leathery +  and fleshy +
alternate +  and subopposite +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
light;dark green +
ovate +  and obovate +
1 +  and 3 +
tubular +  and flattened +
not accrescent +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.8-1.5 times subtending leaves +
Maritime eyebright +
N.S. +, Ont. +, Que. +, Maine +  and n Europe +
0–200 m. +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Grassy and gravelly places, coastal. +
axillary +  and terminal +
deciduous +
triangular +
short-ciliate +  and glabrous +
incised +, dentate +  and crenate +
basal +  and middle +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering summer. +
Bull. Soc. Polymath. Morbihan +
10 +  and 18 +
fusiform +
Weedy +  and Introduced +
subequal +
simple +  and branched +
aerial +  and subterranean +
Basal (?) +  and Middle (?) +
0 cm0 mm <br />0 m <br /> (12 cm120 mm <br />0.12 m <br />) +
not fleshy +
hairy;glabrous +
Euphrasia tetraquetra +
Euphrasia +
species +
longer than wide +
5 +, 4 +, 3 +  and 2 +