Crataegus ×coleae

Crataegus ×coleae Sargent

Trees & Shrubs 1: 7, plate 4. 1902.

Endemic
Treatment appears in FNA Volume 9. Treatment on page 636. Mentioned on page 522, 572, 575, 637.

Shrubs, 40–50 dm, broad. Stems: trunks numerous, spreading, stout, bark close dark; twigs nearly straight or slightly flexuous, slender, new growth light yellow-green, glabrous, marked by oblong pale lenticels, at end of 1st year bright redbrown, very lustrous, 1-year old dark gray-brown; thorns on twigs numerous, straight, stout, 2.5–4.5 cm, lustrous, often retrorse. Leaves: petiole nearly terete, slender, 1.2–1.5 cm; blade ovate to oval, 4.5–5 × 3–3.5 cm, base broadly cuneate, lobes 4 or 5 per side, sinuses shallow, margins sharply serrate, teeth minutely, glandular, glands dark, venation craspedodromous, veins 5 per side, apex acute, abaxial surface pale, adaxial dark green, lustrous, glabrate young, glabrescent. Inflorescences 8–12-flowered; branches glabrous; bracteoles caducous, linear, membranous, margins sessile or stipitate-glandular. Flowers 18–20 mm diam.; hypanthium glabrous; sepals narrowly triangular, margins glandular-serrate; stamens 20, anthers pink, 0.6–0.8 mm; styles 2–4 (or 5). Pomes bright-orange-red, at most slightly pruinose, suborbicular, 8–10 mm diam., punctate, glabrous; sepals reflexed, elevated on collar; pyrenes 2–4 (or 5), dorsally grooved, sides each linearly scarred.


Phenology: Flowering May; fruiting late Sep.
Habitat: Successional fields, brush
Elevation: 200–300 m

Discussion

Crataegus ×coleae is rare and known from near Grand Rapids from the late 1800s to the 1940s; it is a presumptive interserial hybrid C. pruinosa (ser. Pruinosae) × C. scabrida (ser. Anomalae). The somewhat unstable leaf form and scarred lateral pyrene faces, reminiscent of C. scabrida, and elevated fruiting calyx, 20 stamens, and glabrous parts, reminiscent of C. pruinosa, are good markers.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus ×coleae"
glabrescent +  and glabrate +
0.8 cm8 mm <br />0.008 m <br /> (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 />) +
James B. Phipps +
Crataegus ×coleae Sargent +
compound +  and simple +
opposite +  and alternate +
cuneate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (5 cm50 mm <br />0.05 m <br />) +
ovate +  and oval +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
3cm +  and 3.5cm +
adnate +  and distinct +
crowded +, scattered +  and alternate +
not +  and aggregated +
200–300 m +
bright redbrown +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 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 />) +
craspedodromous +
dark gray-brown +  and light yellow-green +
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 +
glandular-serrate +  and serrate +
stipitate-glandular +
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 +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering May +  and fruiting late Sep. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
bright-orange-red +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
suborbicular +
Trees & Shrubs +
not arillate +
persistent +
free +  and distinct +
triangular +
1-50-flowered +  and few-leaved +
scarred +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus ×coleae +
Crataegus +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
flexuous +  and straight +
slender +