Crataegus teres

Beadle

Biltmore Bot. Stud. 1: 43. 1901.

Endemic
Synonyms: Crataegus alabamensis var. teres (Beadle) Lance
Treatment appears in FNA Volume 9. Treatment on page 628. Mentioned on page 618, 621, 629.

Shrubs or trees, 30–60 dm, branches ± weeping. Stems: twigs slightly flexuous, new growth glabrate, 1-year old tawny to reddish-brown, 2-years old dark gray; thorns on twigs ± straight, 2-years old shiny blackish gray, ± fine to ± stout, 2–3 cm. Leaves: petiole length 15–20% blade, ± pilose young, glandular; blade dark green mature adaxially, narrowly obovate, 2–3.5 cm, thin, slightly coriaceous, base ± evenly tapered, lobes 0, margins finely glandular-serrate, veins (2 or) 3 or 4 per side, apex flat-triangular to rounded or ± truncate, often minutely cuspidate, adaxially shiny mature, abaxial surface glabrous, adaxial veins sparsely hairy; on extension shoots broadly elliptic to suborbiculate, larger, often slightly incised, strongly serrate. Inflorescences 2–6-flowered; branches glabrate; bracteoles linear, margins glandular. Flowers 16 mm diam.; hypanthium glabrous; sepals narrowly triangular, 4–5 mm, margins glandular-serrate, adaxially sparsely hirsute; anthers pale-yellow; styles 2 or 3. Pomes red, ± ellipsoid, 8–10 mm diam., glabrous; sepals spreading, 7 mm; pyrenes 2 or 3.


Phenology: Flowering Mar; fruiting Aug–Sep.
Habitat: Pine woods, sandy fields
Elevation: 0–100 m

Discussion

Crataegus teres, C. attrita, and C. florens appear to form a natural group and may be difficult to distinguish. They share more or less unlobed, rather narrow, subcoriaceous, bright to deep green leaves with more or less sharply denticulate margins, subglabrous herbage, and inflorescence branches subglabrous to pilose, lacking the dense tomentum characteristic of many members of ser. Lacrimatae. They are not part of the C. alabamensis complex. Crataegus teres, the least common of the three, has perhaps the most individual characteristics, including manifesting a merely slightly flexuous twig, having the smoothest leaf tips, and with C. florens, the most venous leaves (usually 3–4 per side), also subglabrous or pilose inflorescence branches, and 2 or 3 styles, an ensemble of characteristics not unlike what might be found in ser. Crus-galli.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus teres"
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
pale-yellow +
cuspidate +  and truncate +
James B. Phipps +
Beadle +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
tapered +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
obovate +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
semipersistent +, caducous +  and deciduous +
adnate +  and distinct +
crowded +, scattered +  and alternate +
spreading +  and pendulous +
not +  and aggregated +
0–100 m +
broadly elliptic +  and suborbiculate +
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 />) +
dark gray +, tawny +  and reddish-brown +
old +  and new +
Pine woods, sandy fields +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
incised +
larger +
eglandular +  and craspedodromous +
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 +
Flowering Mar +  and fruiting Aug–Sep. +
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 />) +
ellipsoid +
Biltmore Bot. Stud. +
not arillate +
circumscissile +
persistent +
free +  and distinct +
triangular +
nonaccrescent +
7 cm70 mm <br />0.07 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
woolly-tomentose +
Crataegus alabamensis var. teres +
Crataegus teres +
Crataegus (sect. Coccineae) ser. Lacrimatae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
blackish gray +
straight +
slender +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +  and flexuous +
determinate +
sparse +  and numerous +
4 +  and 3 +
tree +  and shrub +