Crataegus harbisonii

Beadle

Bot. Gaz. 28: 413. 1899.

Common names: Harbison hawthorn
Conservation concernEndemic
Basionym: Undefined selectedreference Lance R. and J. B. Phipps. 2000. Crataegus harbisonii rediscovered and amplified. Castanea 85: 291–296.
Treatment appears in FNA Volume 9. Treatment on page 608. Mentioned on page 607.

Shrubs or trees, 50–80 dm. Stems: twigs: new growth sparsely pilose, 1-year old chestnut-brown, becoming smooth; thorns on twigs frequent, 2-years old glossy, dark-brown or nearly black, stout, 3–4 cm. Leaves: petiole length 15–20% blade, sparsely pilose, gland-dotted; blade shiny green, broadly elliptic to ovate, 4–7 cm, base cuneate, lobes 0 or 1–4 per side, sometimes apiculi, sinuses very shallow, margins doubly serrate, 5 teeth per cm, teeth 2 mm, gland-tipped early, veins 6 or 7 per side, apex acute, abaxial surface pubescent on veins mature, adaxial appressed-pubescent young. Inflorescences 5–12-flowered, arising subterminally from perennial short-shoots, also frequently on leafy side shoots of season lateral to extension shoots; branches pilose; bracteoles semipersistent, ligulate, 7–18 mm, subherbaceous, margins glandular-pectinate to glandular-serrate. Flowers 20–25 mm diam.; hypanthium pubescent; sepals lanceolate, margins glandular-laciniate; stamens 20, anthers cream to light yellow; styles 3–5. Pomes orange-red to red, 12–22 mm diam., pubescent; sepals patent-reflexed; pyrenes 3–5.2n = 68.


Phenology: Flowering early May; fruiting Sep–Nov.
Habitat: Wooded hills, creekside brush
Elevation: 0–200 m

Discussion

Of conservation concern.

Crataegus harbisonii is rare and is similar both to C. ashei and C. triflora and could perhaps be thought of as a particularly robust form of C. ashei; however, it is perhaps more likely of hybrid origin between these species. The most significant similarity to C. triflora (ser. Triflorae) is an ability to produce inflorescences on shoots of the season lateral to extension shoots. Nevertheless, it is easily distinguished from C. triflora by characteristics of growth habit, by its smaller flowers (except in the Louisiana and some Mississippi forms of C. triflora) with fewer stamens, by the more coriaceous leaves with larger and more distant teeth, by having among the most persistent bracteoles in the genus, a feature that led to the creation of ser. Bracteatae.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus harbisonii"
appressed-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cream +  and light yellow +
James B. Phipps +
Beadle +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
Undefined selectedreference +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
broadly elliptic +  and ovate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
semipersistent +
0.7 cm7 mm <br />0.007 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Harbison hawthorn +
Ala. +  and Tenn. +
not +  and aggregated +
0–200 m +
mealy +  and more or less hard +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 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 />) +
chestnut-brown +
old +  and new +
Wooded hills, creekside brush +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
glandular-laciniate +  and glandular-pectinate +
stipitate-glandular +
glandular-laciniate +, glandular-pectinate +  and glandular-serrate +
smaller +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
subterminal +
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 +
gland-dotted +
stipitate-glandular +  and pubescent +
Flowering early May +  and fruiting Sep–Nov. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
orange-red +  and red +
1.2 cm12 mm <br />0.012 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
suborbicular +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
stipitate-glandular +
not arillate +
persistent +
free +  and distinct +
patent-reflexed +
lanceolate +
nonaccrescent +
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 harbisonii +
Crataegus (sect. Coccineae) ser. Bracteatae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
black +  and dark-brown +
straight +
less stout +  and more or less slender +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
gland-tipped +
2 cm20 mm <br />0.02 m <br /> (?) +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
few +  and numerous +
7 +  and 6 +
tree +  and shrub +