Crataegus (sect. Crataegus) ser. Crataegus

Treatment appears in FNA Volume 9. Treatment on page 496. Mentioned on page 495, 497, 498, 636.

Shrubs or trees, 40–100 [–120] dm. Stems: trunk bark freshly exposed ± orange, older gray-brown, flattened-scaly, exfoliating in elongate strips; compound thorns on trunks usually absent; thorns on twigs determinate or indeterminate. Leaves deciduous; petiole length 30–50% blade; blade broadly elliptic to obovate or ovate to deltate, lobes 1–3 per side, sinuses shallow or deep, venation craspedodromous, veins to lobes and sinuses; blades on extension shoots sometimes fully pinnate. Inflorescences 3–15-flowered; branches glabrous [to lanate]; bracteoles caducous, ± linear, small, membranous, margins entire or denticulate or with small protuberances or pegs bearing terminal, small glands. Flowers 8–22 mm diam.; sepals narrowly triangular; stamens [10–] 20, filaments long, anthers pink to purple; styles 1–3. Pomes bright to dark red [black], ± orbicular to ± cylindric, 6–14 mm diam., glabrous [to tomentose]; flesh yellowish; sepal remnants persistent; pyrenes 1–3, dorsally shallowly grooved, sides grooved [plane].

Distribution

Introduced; Europe, w Asia, n Africa, also in South America, s Africa, Pacific Islands (New Zealand), Australia

Discussion

Species ca. 25 (2 in the flora).

Crataegus oxyacantha Linnaeus is a rejected name of this series that is suppressed by C. rhipidophylla Gandoger. There are several instances of its misapplication in North America to C. monogyna.

Selected References

None.

Key

1 Leaf lobe apices obtuse, sinuses ± shallow; styles 2 or 3. Crataegus laevigata
1 Leaf lobe apices acute, sinuses usually deep; style 1. Crataegus monogyna
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
pink +  and purple +
James B. Phipps +
Linnaeus +
exfoliating +
compound +  and simple +
opposite +  and alternate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
broadly elliptic +  and obovate or ovate +
1.2 cm12 mm <br />0.012 m <br /> (6 cm60 mm <br />0.06 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Europe +, w Asia +, n Africa +, also in South America +, s Africa +, Pacific Islands (New Zealand) +  and Australia +
not +  and aggregated +
0.8 cm8 mm <br />0.008 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
yellow +  and red or purplish +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
tomentose +  and glabrous +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
entire +  and serrate +
with small protuberances or pegs +, denticulate +  and entire +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
elliptic +  and circular +
0 (?) +  and 4 (?) +
free +  and distinct +
post-mature +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
0.6 cm6 mm <br />0.006 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
less orbicular +  and more or less cylindric +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
not arillate +
persistent +
free +  and distinct +
appressed +  and erect +
triangular +
1-50-flowered +  and few-leaved +
craspedodromous +
deep +  and shallow +
free +  and distinct +
branched +  and simple +
elongate +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus (sect. Crataegus) ser. Crataegus +
Crataegus sect. Crataegus +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
curved +  and straight +
slender +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
exfoliating +
1 +  and few +
indeterminate +  and determinate +
2 +  and 8 +
tree +  and shrub +