Crataegus exilis

Beadle

Biltmore Bot. Stud. 1: 76. 1902.

Conservation concernEndemic
Treatment appears in FNA Volume 9. Treatment on page 632. Mentioned on page 618, 619, 620.

Shrubs, 20–40 dm, branches ± weeping. Stems: trunk bark dark gray or brownish, rough; upper twigs suberect, others ± spreading; twigs slightly flexuous, new growth pubescent, 1-year old light gray-brown, older gray-brown; thorns on twigs few, straight, dark, 1–1.5 cm. Leaves: petiole length 25–30% blade, winged distally, pubescent young, glandularity not recorded; blade broadly obovate to broadly rhombic-elliptic, the smaller ± oblong-cuneate, 1.5–2.5 (–3) cm, firm to subcoriaceous, base tapered, lobes 0, or 1 (or 2) per side, subterminal, sinuses shallow (LII to 10%), lobe apex subacute, margins crenate-serrate (distal 1/2), veins 3 per side, apex subacute, surfaces pubescent young, particularly abaxially on veins, glabrescent; on extension shoots deeply incised. Inflorescences 3–7-flowered; branches pilose-pubescent; bracteoles oblong-linear, margins glandular. Flowers 15 mm diam.; hypanthium pilose; sepals narrowly triangular, 3–4 mm, margins subentire or finely glandular-serrate, abaxial pubescence not recorded; anthers cream or ivory; styles 3–5. Pomes red, orbicular, 5–7 mm diam., glabrous; sepals usually erose; pyrenes 3–5.


Phenology: Flowering Mar–Apr; fruiting Aug–Sep.
Habitat: Sandy soil, stream banks
Elevation: 60 m

Discussion

Of conservation concern.

Crataegus exilis is only known from the type locality in south-central Georgia. Its appearance is distinctive; unfortunately, it is known only from flowering and fruiting syntypes. The species is somewhat anomalous in ser. Lacrimatae and slightly resembles a larger C. calva (ser. Apricae) but has pilose inflorescence branches, slightly different leaf shape, and somewhat different leaf margins.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus exilis"
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
ivory +  and cream +
James B. Phipps +
Beadle +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
tapered +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
oblong-cuneate +, broadly obovate +  and broadly rhombic-elliptic +
smaller +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
? (?) +  and ? (?) +
semipersistent +, caducous +  and deciduous +
pilose-pubescent +
adnate +  and distinct +
crowded +, scattered +  and alternate +
spreading +  and pendulous +
not +  and aggregated +
15 cm150 mm <br />0.15 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 light gray-brown +
older +, old +  and new +
Sandy soil, stream banks +
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 +
short-pubescent +
glandular-serrate +  and subentire +
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 +
Flowering Mar–Apr +  and fruiting Aug–Sep. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
orbicular +
Biltmore Bot. Stud. +
not arillate +
circumscissile +
persistent +
free +  and distinct +
triangular +
nonaccrescent +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1-50-flowered +  and few-leaved +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrescent +  and pubescent +
Crataegus exilis +
Crataegus (sect. Coccineae) ser. Lacrimatae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
flexuous +
determinate +