Euphrasia arctica subsp. borealis

(F. Townsend) Yeo

Bot. J. Linn. Soc. 64: 358. 1971.

Common names: Boreal eyebright
Basionyms: Euphrasia rostkoviana Hayne forma borealis F. Townsend Bot. Exch. Club Brit. Isles Rep. 1: 307. 1891
Synonyms: E. ×aequalis Callen E. borealis (F. Townsend) Wettstein E. ×vestita Callen
Treatment appears in FNA Volume 17. Treatment on page 496. Mentioned on page 495.

Stems: base erect; branches 1–5 (or 6) pairs, usually straight. Inflorescences: bract surfaces hairy, hairs glandular and eglandular bristles, teeth much longer than wide. Flowers: corolla 6–8 (–10) mm. 2n = 44 (Europe).


Phenology: Flowering early summer–fall.
Habitat: Meadows, pastures, roadsides, dunes, wood margins, scrub, grassy places, rocky shorelines, open, moist calcareous barrens.
Elevation: 0–300 m.

Distribution

Greenland, B.C., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Maine, Europe (British Isles), Europe (Norway), Atlantic Islands (Iceland)

Discussion

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

1.1 cm11 mm <br />0.011 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Truncate (?) +  and Retuse (?) +
Galina Gussarova +
(F. Townsend) Yeo +
Euphrasia rostkoviana +
0.3 cm3 mm <br />0.003 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
not leathery +  and fleshy +
alternate +  and subopposite +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
purplish;green +
deltate +  and ovate +
1 +  and 5 +
tubular +  and flattened +
not accrescent +
oblong;elliptic or obovate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2-4 times subtending leaves +
Boreal eyebright +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
lilac +  and white +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Greenland +, B.C. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Maine +, Europe (British Isles) +, Europe (Norway) +  and Atlantic Islands (Iceland) +
0–300 m. +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Meadows, pastures, roadsides, dunes, wood margins, scrub, grassy places, rocky shorelines, open, moist calcareous barrens. +
axillary +  and terminal +
deciduous +
triangular +
short-ciliate +  and glabrous +
incised +, dentate +  and crenate +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering early summer–fall. +
Bot. J. Linn. Soc. +
10 +  and 18 +
fusiform +
2-celled +  and 1-celled +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
subequal +
branched +  and simple +
aerial +  and subterranean +
0 cm0 mm <br />0 m <br /> (25 cm250 mm <br />0.25 m <br />) +
not fleshy +
setose;glabrous +
E. ×aequalis +, E. borealis +  and E. ×vestita +
Euphrasia arctica subsp. borealis +
Euphrasia arctica +
subspecies +
much longer than wide +
3 +  and 6 +