Crataegus scabrida

Sargent

Rhodora 3: 29. 1901.

Common names: Rough hawthorn aubépine scabride
Endemic
Synonyms: Crataegus brainerdii var. scabrida (Sargent) Eggleston
Treatment appears in FNA Volume 9. Treatment on page 523. Mentioned on page 522, 524, 637.

Shrubs, 30–50 dm. Stems: twigs: new growth reddish early, glabrous, 1-year old deep tan, 2-years old tan to deep reddish-brown, older dull gray; thorns on twigs at 1-year old shiny, dark-brown to nearly black, stout or slender, 4–6 cm. Leaves: petiole slender, length 40–60% blade, sparsely pubescent or glabrous, eglandular or sessile-glandular; blade short-ovate to ovate, broadly elliptic to narrowly rhombic, or ± trullate, 3–8 cm, base rounded to cuneate, lobes 3–5 per side, margins serrate, veins 5–7 (or 8) per side, apex acute, abaxial surface glabrous, adaxial sparsely to densely appressed-pubescent young, glabrescent. Inflorescences 6–10-flowered; branches glabrous or villous. Flowers 15–18 mm diam.; hypanthium glabrous or pubescent; sepals narrowly triangular, margins subentire or glandular-serrate; stamens 7 or 8 (–10), anthers pink; styles 3 or 4. Pomes reddish or orange-red, suborbicular, 6–9 mm diam., pruinose, glabrous or slightly pubescent; sepals spreading to ± erose; pyrenes 2–4, sides often pitted. 2n = 51.

Distribution

V9 885-distribution-map.jpg

N.B., N.S., Ont., Que., Conn., Maine, Mass., Mich., N.H., N.Y., Va., Vt., Wis.

Discussion

Varieties 4 (4 in the flora).

Crataegus scabrida is variable in leaf shape and size, as well as in pubescence of adaxial leaf surfaces and pedicels. The species falls into four reasonably well-marked varieties, only the first two of which are frequent. The range of the species as a whole is somewhat poorly documented because of frequent incorrect identification.

Selected References

None.

Key

1 Inflorescence branches glabrous > 2
1 Inflorescence branches villous > 3
2 Leaf blades ovate to narrowly rhombic, 4–7 cm. Crataegus scabrida var. scabrida
2 Leaf blades broadly elliptic, 3–5 cm. Crataegus scabrida var. cyclophylla
3 Leaf blades trullate or broadly trullate, 5–8 cm. Crataegus scabrida var. asperifolia
3 Leaf blades short-ovate to broadly elliptic, 4 cm. Crataegus scabrida var. egglestonii
... more about "Crataegus scabrida"
glabrescent +  and appressed-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
James B. Phipps +
Sargent +
compound +  and simple +
opposite +  and alternate +
rounded +  and cuneate +
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 />) +
short-ovate +  and ovate broadly elliptic +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
villous +  and glabrous +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Rough hawthorn +  and aubépine scabride +
N.B. +, N.S. +, Ont. +, Que. +, Conn. +, Maine +, Mass. +, Mich. +, N.H. +, N.Y. +, Va. +, Vt. +  and Wis. +
not +  and aggregated +
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 />) +
gray +, tan +  and deep reddish-brown +
older +, old +  and new +
pubescent +  and glabrous +
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 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 +
sessile-glandular +  and eglandular +
glabrous +  and pubescent +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
orange-red +  and reddish +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
pubescent +  and glabrous +
suborbicular +
not arillate +
persistent +
free +  and distinct +
glandular-serrate +  and subentire +
triangular +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus brainerdii var. scabrida +
Crataegus scabrida +
Crataegus (sect. Macracanthae) ser. Anomalae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dark-brown +  and nearly black +
slender +  and stout +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
reddish-brown +  and dark +
determinate +
stout +  and more or less slender +
5 +  and 7 +