Crataegus brainerdii

Sargent

Rhodora 3: 27. 1901.

Common names: Brainerd hawthorn aubépine de Brainerd
Endemic
Treatment appears in FNA Volume 9. Treatment on page 523. Mentioned on page 522, 524.

Shrubs or trees, 40–50 dm. Stems: twigs: new growth green, glabrous, 1–2-years old shiny, dark-brown, older dark gray; thorns on twigs at 1-year old very dark, shiny, stout, 3–4.5 cm. Leaves: petiole length 40% blade, glabrous, glandular; blade ovate to narrowly ovate, 4–7 cm, base cuneate to rounded, lobes 3 or 4 per side, margins serrate, teeth numerous, sharp, fine, gland-tipped, especially near base, veins 5 or 6 per side (even young), apex acute, abaxial surface glabrous except for tufts in vein-axils, adaxial glabrate. Inflorescences 7–12-flowered; branches glabrous; bracteoles absent or few at anthesis. Flowers 15–18 mm diam.; hypanthium glabrous; sepals narrowly triangular, margins glandular-serrate; stamens 20, anthers pink to red; styles 2 or 3 (–5). Pomes reddish, ± oblong-orbicular, 8–9 mm diam., glabrous; sepals ± sessile; pyrenes 2 or 3, sides erose.


Phenology: Flowering May–Jun; fruiting Sep–Oct.
Habitat: Successional fields, brush
Elevation: 10–300 m

Distribution

V9 884-distribution-map.jpg

Ont., Que., Maine, Mass., Mich., N.H., N.Y., Vt., Wis.

Discussion

Crataegus brainerdii has a scattered distribution and seems nowhere common. E. J. Palmer (1950) recorded it from North Carolina but this is well out of range. This species is similar in leaf shape to C. scabrida var. scabrida; it differs in stamen number.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Crataegus brainerdii"
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
pink +  and red +
James B. Phipps +
Sargent +
compound +  and simple +
opposite +  and alternate +
cuneate +  and rounded +
Crataegus sect. Anomalae +
less ovate or rhombic-elliptic +  and rhombic-elliptic +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
ovate +  and narrowly ovate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Brainerd hawthorn +  and aubépine de Brainerd +
Ont. +, Que. +, Maine +, Mass. +, Mich. +, N.H. +, N.Y. +, Vt. +  and Wis. +
not +  and aggregated +
10–300 m +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 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 />) +
dark gray +, dark-brown +  and green +
older +, old +  and new +
Successional fields, brush +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
craspedodromous +
glandular-serrate +  and serrate +
serrate +  and crenate +
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 +
glandular +  and eglandular +
Flowering May–Jun +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
oblong-orbicular +
not arillate +
persistent +
free +  and distinct +
glandular-serrate +  and subentire +
appressed +  and erect +
triangular +
1-50-flowered +  and few-leaved +
pitted +  and erose +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus ser. +
Crataegus brainerdii +
Crataegus (sect. Macracanthae) ser. Anomalae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
slender +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
reddish-brown +  and dark +
determinate +
stout +  and more or less slender +
6 +  and 5 +
tree +  and shrub +