Erica tetralix

Linnaeus

Sp. Pl. 1: 353. 1753 ,.

Common names: Crossleaf heath
IntroducedIllustrated
Treatment appears in FNA Volume 8. Treatment on page 494. Mentioned on page 493.

Plants erect or ascending, 10–25 cm; twigs of current season green, with both appressed and spreading, stiff hairs, older twigs brown, glabrescent. Leaves in whorls of 4; petiole 0.1–0.3 mm; blade linear-lanceolate, flat, 3–5.5 × 0.5–0.7 mm, margins revolute, not prickled, abaxial surface stiffly short-hairy, adaxial sparsely, stiffly short-hairy (hairs ca. 0.1–0.2 mm), mixed with longer, glandular-hairs (hairs 0.5–0.6 mm). Inflorescences terminal umbels, capitate, 0.8–1.6 cm. Pedicels 2–3 mm, glabrous. Flowers: calyx lobes narrowly deltate, 2.5 × 0.6–0.8 mm, margins entire, with short, stiff hairs, apex obtuse, with short, stiff hairs; corolla light pink, campanulate, 4–5 mm, lobes deltate, 0.5 mm, apex acute; stamens 10; filaments ca. 3 mm; anthers awned, ca. 0.7 mm, awns 2, basal, subulate, ca. 0.7 mm; ovary hairy; style 3–4 mm; stigma included, not slender, capitate. Capsules 1.5–2 mm. Seeds ellipsoid-ovoid, 0.3 × 0.3 mm, reticulate. 2n = 24.


Phenology: Flowering late spring–summer.
Habitat: Sandy, acidic, upland sites in old pastures and roadsides
Elevation: 0-1100 m

Distribution

V8 965-distribution-map.gif

Introduced; N.S., Conn., Maine, Mass., N.H., N.J., N.C., Ohio, W.Va., n, w Europe

Discussion

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Erica tetralix"
0.7 cm7 mm <br />0.007 m <br /> (?) +
Acute (?) +  and Obtuse (?) +
Gordon C. Tucker +
Linnaeus +
dehiscent +
subulate +
0.7 cm7 mm <br />0.007 m <br /> (?) +
furrowed +  and smooth +
not flaky +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
linear-lanceolate +
coriaceous +
0.5mm;0.7mm +
2.5 cm25 mm <br />0.025 m <br /> (?) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Crossleaf heath +
rotate to crateriform campanulate cylindric globose or urceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
N.S. +, Conn. +, Maine +, Mass. +, N.H. +, N.J. +, N.C. +, Ohio +, W.Va. +, n +  and w Europe +
0-1100 m +
undifferentiated +
fusiform +
3 cm30 mm <br />0.03 m <br /> (?) +
pendulous +  and erect +
loculicidal +
ellipsoid +
Sandy, acidic, upland sites in old pastures and roadsides +
multicellular +
axillary +  and terminal +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
persistent +
deltate +
revolute;plane;toothed;entire;revolute;plane;toothed;entire +
parietal +, axile +  and placentation +
tenuinucellate +  and unitegmic +
10-30-flowered +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
4 +  and 5 +
reduced +
not sticky +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Flowering late spring–summer. +
4-5-carpellate +
subterminal +
10-30-flowered +
distinct +
0.3 cm3 mm <br />0.003 m <br /> (?) +
ellipsoid-ovoid +
0.3 cm3 mm <br />0.003 m <br /> (?) +
distinct +
4 +  and 5 +
Introduced +  and Illustrated +
exserted +  and included +
procumbent +  and prostrate +
creeping +  and sprawling +
creeping +, spreading +  and erect +
peltate +  and capitate +
capitate +, obconic +  and filiform +
not slender +
straight +
exserted +  and included +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Undefined tribe Empetraceae +
Erica tetralix +
species +
foveolate +  and reticulate +
glabrescent +
10-30-flowered +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +
ascending +  and erect +