Crataegus ×vailiae

Crataegus ×vailiae Britton

Bull. Torrey Bot. Club 24: 53. 1897.

Common names: Vail’s hawthorn
Endemic
Synonyms: Crataegus conjungens Sargent C. missouriensis Ashe C. palliata Sargent
Treatment appears in FNA Volume 9. Treatment on page 642. Mentioned on page 516, 518, 522, 605, 610, 643.

Shrubs, 20–40 (–50) dm. Stems: twigs: new growth densely pubescent, 1-year old sparsely pubescent, 2-years old shiny, dark blackish brown to dark gray, glabrous, older dark gray; thorns on twigs absent or few, straight to slightly recurved, 2-years old black, ± narrow, 3 cm. Leaves deciduous; petiole length 5–15% blade, pubescent, sometimes glandular; blade elliptic to rhombic-elliptic, 4–5 (–6) cm, ± coriaceous, base cuneate, lobes 1–3 per side, sinuses extremely shallow, lobe apex subacute, margins toothed, teeth large, acute or subacute except near base, sharp or obtuse, eglandular, tapered to bases, venation craspedodromous, veins 4–6 per side, apex subacute, adaxial surfaces matte, appressed-pubescent young, abaxial very sparsely pubescent, glabrescent, veins persistently densely pubescent. Inflorescences 2–8 (–20) -flowered; branches very densely appressed-pubescent; bracteoles caducous, few, linear, membranous, margins glandular, sometimes larger (15 × 3 mm), more herbaceous in basal parts. Flowers 15–20 mm diam.; hypanthium densely pubescent; sepals narrowly triangular, 6–8 mm, ± equal to petals, ± foliaceous, margins glandular-laciniate, abaxial surface slightly pubescent; stamens 20, anthers cream, pink, or red; styles 3–5. Pomes straw yellow to ruddy, suborbicular, 7–9 mm diam., hairy; sepals reflexed; pyrenes 3–5, dorsally grooved, sides usually shallowly eroded.


Phenology: Flowers Apr–May; fruiting Sep–Oct.
Habitat: Brush, stream banks, borders of woods

Distribution

V9 1108-distribution-map.jpg

Ark., Ga., Mo., N.C., Tenn., Va.

Discussion

Crataegus ×vailiae, with its similarities to C. uniflora, may be a hybrid between that species and a member of ser. Macracanthae, most likely C. calpodendron. Fruit color is recorded as in cultivation at Kew; B. F. Bush (on herbarium label) noted it as deep red and succulent on wild plants in Missouri. Crataegus conjungens appears to be a smaller form of C. ×vailiae.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus ×vailiae"
pubescent +  and glabrescent +
appressed-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
red +, pink +  and cream +
James B. Phipps +
Crataegus ×vailiae Britton +
compound +  and simple +
opposite +  and alternate +
cuneate +
elliptic +  and rhombic-elliptic +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
less ovate +  and narrowly elliptic or obovate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
appressed-pubescent +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Vail’s hawthorn +
Ark. +, Ga. +, Mo. +, N.C. +, Tenn. +  and Va. +
not +  and aggregated +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 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 />) +
dark gray +  and brown +
older +, old +  and new +
glabrous +  and pubescent +
Brush, stream banks, borders of woods +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-8(-20)-flowered +
crassinucellate +
deciduous +
entire +  and serrate +
glandular-laciniate +  and toothed +
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 +
pubescent +
Flowers Apr–May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
straw yellow +  and ruddy +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
suborbicular +
Bull. Torrey Bot. Club +
not arillate +
persistent +
free +  and distinct +
triangular +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus conjungens +, C. missouriensis +  and C. palliata +
Crataegus ×vailiae +
Crataegus +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
3 cm30 mm <br />0.03 m <br /> (?) +
craspedodromous +  and eglandular +
tapered +, obtuse +, sharp +, subacute +  and acute +
inconspicuous +
4 +  and 6 +