Crataegus jesupii

Sargent

Rhodora 5: 61. 1903.

Common names: Jesup hawthorn
Conservation concernEndemic
Synonyms: Crataegus bellula Sargent C. filipes Ashe
Treatment appears in FNA Volume 9. Treatment on page 571. Mentioned on page 522, 568.

Shrubs or trees, 70 dm. Stems: twigs: new growth reddish, glabrous, 1-year old dark-brown, often strongly pruinose, 2-years old blackish, older dark gray, becoming paler later; thorns on twigs recurved to ± straight, 2-years old blackish, ± slender, 3–5 cm. Leaves: petiole 2–4 cm, glabrous, glandular; blade sometimes ± blue-green mature, trullate-ovate, 4–7 cm, thin but firm, base ± broadly cuneate, lobes 3 or 4 per side, sinuses deep, angled, lobe apex often ± aligned, acuminate, margins serrate, proximal teeth gland-tipped, veins 4 or 5 per side, apex acute, abaxial surface glabrous, adaxial short-pubescent young, soon glabrescent. Inflorescences 4–8-flowered; branches glabrous; bracteoles few, margins glandular. Flowers 15–18 mm diam.; hypanthium glabrous; sepals ± triangular, 4–6 mm, margins entire or glandular-serrate; stamens 10 (20), anthers pink or rose; styles 4. Pomes red, pyriform-oblong, 8–10 mm diam., slightly pruinose; sepals spreading; pyrenes 3–5, dorsally grooved.


Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Borders of woods, thickets
Elevation: 20–300 m

Distribution

V9 971-distribution-map.jpg

Ont., Conn., Mich., N.Y., Ohio, Pa., Wis.

Discussion

Of conservation concern.

Crataegus jesupii ranges from Wisconsin to Connecticut, Ohio, and Pennsylvania.

In Michigan, Crataegus jesupii is notable for its stipitate-glandular bracteoles. Forms with wider leaves, about as wide as long, are represented by C. filipes. An otherwise identical Ontario specimen has 20 stamens and would key out to C. beata.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus jesupii"
glabrescent +  and short-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
rose +  and pink +
James B. Phipps +
Sargent +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
7 cm70 mm <br />0.07 m <br /> (8 cm80 mm <br />0.08 m <br />) +
trullate-ovate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Jesup hawthorn +
Ont. +, Conn. +, Mich. +, N.Y. +, Ohio +, Pa. +  and Wis. +
not +  and aggregated +
20–300 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 />) +
paler +, dark gray +, blackish +, dark-brown +  and reddish +
older +, old +  and new +
Borders of woods, thickets +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
glandular-serrate +, entire +  and serrate +
short-stipitate-glandular +
subentire or +  and shallowly moderately glandular-serrate +
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 +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
pyriform-oblong +
not arillate +
persistent +
free +  and distinct +
triangular +
nonaccrescent +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1-50-flowered +  and few-leaved +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus bellula +  and C. filipes +
Crataegus jesupii +
Crataegus (sect. Coccineae) ser. Populneae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
craspedodromous +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
5 +  and 4 +
tree +  and shrub +