Crataegus pexa

Beadle

Biltmore Bot. Stud. 1: 116. 1902.

Endemic
Synonyms: Crataegus munda var. pexa (Beadle) Lance
Treatment appears in FNA Volume 9. Treatment on page 627. Mentioned on page 620, 628.

Shrubs, small (on only specimen with indication of stature), branches ± weeping. Stems: twigs: new growth densely white-tomentose, 1-year old dark gray, older gray, ± stout; thorns on twigs usually numerous, slightly to strongly recurved, 1-year old purple-black, older blackish, slender, 3–5 (–7) cm. Leaves: petiole length 10–20% blade, tomentose, glandular young; blade dark green mature, obovate to narrowly obovate-rhombic, 1.5–3 cm, stiff and ± coriaceous, base cuneate, lobes 0 or very short and subterminal, sinuses shallow, lobe apex subacute, margins strongly crenate-serrate, veins 2 or 3 per side, apex acute to obtuse, surfaces white-tomentose young, glabrescent. Inflorescences 1–3-flowered; branches tomentose; bracteoles oblong-linear, margins glandular. Flowers 12 mm diam.; hypanthium densely tomentose; sepals ± linear, margins glandular-serrate, abaxially tomentose; anther color not recorded; styles 4. Pomes orange, suborbicular, 8–10 mm diam., tomentose; sepals reflexed; pyrenes 4.


Phenology: Flowering Mar–Apr; fruiting Aug.
Habitat: Dry woodlands
Elevation: 20–200 m

Discussion

Crataegus pexa is widely distributed in North Carolina with a few records from South Carolina and Georgia. The similarities of C. colonica to C. pexa have been noted under that species. Crataegus pexa differs in its often slightly incised and more prominently toothed leaf margins, generally lower plant stature, relatively wider leaf blades, suborbicular fruits, longer and abundant thorns, and strongly flexuous twigs.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus pexa"
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
white +  and cream +
James B. Phipps +
Beadle +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
obovate +  and narrowly obovate-rhombic +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
semipersistent +, caducous +  and deciduous +
adnate +  and distinct +
crowded +, scattered +  and alternate +
spreading +  and pendulous +
Ga. +, N.C. +  and S.C. +
not +  and aggregated +
20–200 m +
12 cm120 mm <br />0.12 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 +  and dark gray +
older +, old +  and new +
white-tomentose +
Dry woodlands +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
subterminal +
eglandular +  and craspedodromous +
glandular-serrate +  and crenate-serrate +
serrate +  and crenate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
firm +  and coriaceous +
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 />) +
circular +  and elliptic +
0 (?) +  and 4 (?) +
free +  and distinct +
post-mature +
tomentose +
Flowering Mar–Apr +  and fruiting Aug. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
suborbicular +
Biltmore Bot. Stud. +
not arillate +
circumscissile +
persistent +
free +  and distinct +
triangular +
nonaccrescent +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrescent +  and white-tomentose +
Crataegus munda var. pexa +
Crataegus pexa +
Crataegus (sect. Coccineae) ser. Lacrimatae +
species +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
blackish +  and purple-black +
straight +
older +  and old +
slender +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
determinate +
3 +  and 2 +