Crataegus oakesiana

Eggleston

Torreya 7: 35. 1907.

Conservation concernEndemic
Treatment appears in FNA Volume 9. Treatment on page 601. Mentioned on page 595.

Shrubs, 60 dm. Stems: twigs: new growth green, glabrous, 1-year old shiny, mid brown, older deep gray; thorns on twigs frequent, recurved, 1-year old shiny reddish to blackish brown, slender to moderately thick, 2–4.5 cm. Leaves: petiole length 40% blade, glabrous, densely glandular; blade broadly ovate to oblong-ovate or broadly elliptic, smaller sometimes ± rhombic, 3–5 cm, on extension shoots larger, often suborbiculate, thin to chartaceous, base cuneate to broadly cuneate or ± rounded, lobes 4 or 5 per side, sinuses shallow, lobe apex triangular, margins serrate teeth numerous, small, veins 6–8 per side, apex acute, abaxial surface glabrous, adaxial densely appressed-scabrous young, glabrescent. Inflorescences 6–10-flowered; branches pilose; bracteoles linear, membranous, margins sessile-glandular. Flowers 16 mm diam.; hypanthium pubescent; sepals narrowly triangular, 6 mm, margins glandular, sometimes barely glandular-serrate, abaxially glabrous; stamens 20, anthers cream; styles 3 or 4. Pomes reddish, broadly ellipsoid to suborbicular, 11–14 mm diam., smooth, glabrous; sepals spreading, often erose; pyrenes 3 or 4.


Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Rocky outcrops
Elevation: 100–200 m

Discussion

Of conservation concern.

Crataegus oakesiana is not very different from C. chrysocarpa var. vigintistamina, differing primarily in its suborbiculate extension-shoot leaves.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus oakesiana"
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
glabrous +  and pubescent +
James B. Phipps +
Eggleston +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +  and broadly cuneate or more or less rounded +
Crataegus sect. Rotundifoliae +
6 cm60 mm <br />0.06 m <br /> (9.5 cm95 mm <br />0.095 m <br />) +
blue-green +  and dark green +
suborbiculate +, rhombic +, broadly ovate +  and oblong-ovate or broadly elliptic +
smaller +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
elliptic +  and linear +
adnate +  and distinct +
crowded +, scattered +  and alternate +
not +  and aggregated +
100–200 m +
16 cm160 mm <br />0.16 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 +, brown +  and green +
older +, old +  and new +
Rocky outcrops +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
stipitate-glandular +
deciduous +
glandular +  and sessile-glandular +
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 +
pubescent +  and glabrous +
Flowering May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
1.1 cm11 mm <br />0.011 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
broadly ellipsoid +  and suborbicular +
nonaccrescent +
not arillate +
persistent +
free +  and distinct +
triangular +
6 cm60 mm <br />0.06 m <br /> (?) +
1-50-flowered +  and few-leaved +
concave +  and plane +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus oakesiana +
Crataegus (sect. Coccineae) ser. Rotundifoliae +
species +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
reddish +  and blackish brown +
straight +
older +  and old +
slender +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
6 +  and 8 +