Cotoneaster horizontalis

Decaisne

Ann. Gén. Hort. 22: 168. 1877.

Common names: Herringbone cotoneaster
IllustratedIntroduced
Treatment appears in FNA Volume 9. Treatment on page 462. Mentioned on page 450, 453, 461, 463.

Shrubs, 0.5–1 m. Stems ascending to erect, spreading horizontally; branches distichous, maroon, initially densely yellow-strigose. Leaves deciduous (tardily so on a few vigorous shoots); petiole 2–3 mm, strigose; blade elliptic or broadly elliptic, on vigorous shoots usually broadly elliptic, sometimes suborbiculate, orbiculate, or broadly obovate, 4–14 × 5–9 mm, subcoriaceous, base obtuse or cuneate, margins flat, veins 2–4, superficial, apex acute, apiculate or obtuse, mucronulate, abaxial surfaces green, sparsely long-strigose, adaxial dark green, shiny, not glaucous, flat between lateral-veins, smooth to slightly rugose, glabrescent; fall leaves orange to rich red. Inflorescences on fertile shoots 8–20 mm with 3 or 4 leaves, 1–3-flowered, compact. Pedicels 1–2 mm, strigose. Flowers 5–7 mm, closed; hypanthium funnelform, sparsely pilose-strigose; sepals: margins villous, apex acute or acuminate, surfaces sparsely strigose; petals erect-incurved, dark-pink to dark red, base blackish red, margins pale crimson; stamens (8–) 10 (–14), filaments dark red, anthers white; styles 2 or 3 (or 4). Pomes bright red, usually broadly obovoid, sometimes obovoid, rarely subglobose, 5–8.5 × 4.5–7.7 mm, shiny, not glaucous, glabrate; sepals suberect, sparsely strigose or glabrate; navel open; style remnants 1/2–3/4 from base. Pyrenes 2 or 3 (or 4), distinct. 2n = 68 (Germany).


Phenology: Flowering Apr–May; fruiting Sep–Mar.
Habitat: Thickets, disturbed forests, paths, cliffs, pilings, rockwork
Elevation: 0–500 m

Distribution

V9 778-distribution-map.jpg

Introduced; B.C., Calif., Oreg., Wash., Asia (China), also in Europe

Discussion

L. Lingdi and A. R. Brach (2003) included within Cotoneaster horizontalis several taxa recognized here as distinct species, including C. flinckii J. Fryer & B. Hylmö and C. perpusillus (C. K. Schneider) Flinck & B. Hylmö. Reports of C. horizontalis from Ontario (J. K. Morton and J. M. Venn 1990) are here referred to C. divaricatus. Reports of C. horizontalis from Indiana are not supported by specimens.

Selected References

None.

Lower Taxa

None.
... more about "Cotoneaster horizontalis"
orange +  and rich red +
glabrescent +  and not glaucous +
smooth +  and slightly rugose +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Jeanette Fryer +, Bertil Hylmö† +  and Peter F. Zika +
Decaisne +
compound +  and simple +
opposite +  and alternate +
blackish red +
cuneate +  and obtuse +
15 cm150 mm <br />0.15 m <br /> (21 cm210 mm <br />0.21 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
obovate +, orbiculate +  and suborbiculate +
0.4 cm4 mm <br />0.004 m <br /> (15 cm150 mm <br />0.15 m <br />) +
5mm +  and 9mm +
yellow-strigose +
adnate +  and distinct +
strigose +  and tomentose +
Herringbone cotoneaster +
B.C. +, Calif. +, Oreg. +, Wash. +, Asia (China) +  and also in Europe +
not +  and aggregated +
0–500 m +
hairy +  and glabrous +
unisexual +  and bisexual +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not +  and aggregated +
not +  and aggregated +
1.4 cm14 mm <br />0.014 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
orange +  and red or purple +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Thickets, disturbed forests, paths, cliffs, pilings, rockwork +
pilose-strigose +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
flattened +  and domed +
crassinucellate +
deciduous +
pinnate +  and entire +
pale crimson +
2 +  and 14 +
revolute +  and flat +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
erect-incurved +
1 +  and 5 +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering Apr–May +  and fruiting Sep–Mar. +
adnate +, free +, connate +  and distinct +
bright red +
0.5 cm5 mm <br />0.005 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
glabrate +  and not glaucous +
subglobose +  and obovoid +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.77 cm7.7 mm <br />0.0077 m <br />) +
Ann. Gén. Hort. +
trigonous +  and planoconvex +
not arillate +
persistent +
free +  and distinct +
glabrate +  and strigose +
triangular +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
tomentose +  and strigose +
Illustrated +  and Introduced +
free +  and distinct +
branched +  and simple +
spreading +, ascending +  and erect +
1 +  and 25 +
short-adnate +
inconspicuous +
deciduous +
distinct +
lateral +  and terminal +
1/2 +  and 3/4 +
elongate +
Ostinia +
Cotoneaster horizontalis +
Cotoneaster +
species +
inconspicuous +
superficial +
2 +  and 4 +