Crataegus populnea

Ashe

Ann. Carnegie Mus. 1: 395. 1902.

Common names: Poplar hawthorn
Endemic
Synonyms: Crataegus compta Sargent C. iracunda var. populnea (Ashe) Kruschke C. luxuriosa Sargent
Treatment appears in FNA Volume 9. Treatment on page 569. Mentioned on page 564, 568, 570, 571.

Shrubs or trees, 60 dm. Stems: twigs: new growth reddish green, glabrous, 1-year old reddish-brown, sometimes dark, older mid gray; thorns on twigs recurved, 2-years old dark blackish red, ± shiny, ± slender, 3–5 cm. Leaves: petiole 2–4 cm, glabrous, eglandular or sparsely glandular; blade ± ovate, 4–7 cm length/width = to 1.5, subcoriaceous, base broadly rounded to broadly cuneate, rarely truncate, lobes 3–5 per side, sinuses usually shallow, lobe apex acute to acuminate, margins strongly serrate, veins 5 or 6 per side, apex acuminate, adaxial surface glabrate to appressed-hairy young, glabrescent; extension-shoot leaf-blades widest 2/5 from base, length/width = 1.3–1.4, sinuses not deep, LII less than 25%, base broadly cuneate, rarely truncate. Inflorescences 5–12-flowered; branches glabrous; bracteoles few, very narrow, margins glandular. Flowers 16–18 mm diam.; hypanthium glabrous; sepals narrowly triangular, 5–6 mm, margins subentire, abaxially glabrous; stamens 6–10, anthers red to purple; styles 3 or 4. Pomes reddish orange to bright red, suborbicular to oblong, 8–11 mm diam.; flesh hard; sepals commonly erose, patent-reflexed; pyrenes 3 or 4, dorsally grooved. 2n = 68.


Phenology: Flowering Apr–May; fruiting Sep–Oct.
Habitat: Brush, fencerows
Elevation: 10–400 m

Distribution

V9 967-distribution-map.jpg

Ont., Mich., N.Y., Ohio, Pa., Va., W.Va., Wis.

Discussion

Crataegus populnea occurs from Wisconsin to New York, to Ohio, and Virginia; it is common at least from southern Ontario to Pennsylvania. Dubious specimens from Georgia and South Carolina have small leaves and are only differentiated from C. iracunda (ser. Tenuifoliae) by their more coriaceous nature. Being out of range for C. populnea, they may represent an odd form of C. iracunda.

Crataegus compta is a variant with more or less pyriform-oblong pomes. Crataegus populnea might be mistaken for C. macrosperma but it has more coriaceous leaves, usually significantly larger in the area of sympatry, and a harder fruit.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus populnea"
glabrescent +, glabrate +  and appressed-hairy +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
red +  and purple +
James B. Phipps +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +, broadly rounded +  and broadly cuneate +
7 cm70 mm <br />0.07 m <br /> (8 cm80 mm <br />0.08 m <br />) +
4cm +  and 7cm +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Poplar hawthorn +
Ont. +, Mich. +, N.Y. +, Ohio +, Pa. +, Va. +, W.Va. +  and Wis. +
not +  and aggregated +
10–400 m +
1.6 cm16 mm <br />0.016 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 />) +
gray +, dark +, reddish-brown +  and reddish green +
older +, old +  and new +
Brush, fencerows +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
subentire +
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 +
sessile-glandular +  and glandular +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Apr–May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
reddish orange +  and bright red +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
suborbicular +  and oblong +
Ann. Carnegie Mus. +
not arillate +
persistent +
free +  and distinct +
patent-reflexed +
triangular +
nonaccrescent +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus compta +, C. iracunda var. populnea +  and C. luxuriosa +
Crataegus populnea +
Crataegus (sect. Coccineae) ser. Populneae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
red +  and dark blackish +
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 +
6 +  and 5 +
tree +  and shrub +