Crataegus ×latebrosa

Crataegus ×latebrosa Sargent

Rep. (Annual) Missouri Bot. Gard. 22: 73. 1912.

Endemic
Synonyms: Crataegus noelensis Sargent
Treatment appears in FNA Volume 9. Treatment on page 639. Mentioned on page 552.

Trees, 60–70 dm. Stems: trunks 15 cm diam.; compound thorns sometimes present on old trunks; branches spreading, forming wide flat or round-topped head; twigs: new growth with matted white hairs, later in 1st year becoming reddish-brown, pubescent or puberulous, strongly flexuous, 1-year old gray, stout; thorns on twigs few or numerous, straight, 1-year old purple, slender, 2–7 cm, lustrous. Leaves deciduous; petiole slender, length 20–37% blade, slightly winged apically, hoary tomentose early, glabrescent; blade dark yellow-green, ovate to oval, 5–8 × 3–6 cm, more than 1/2 grown at anthesis, base narrowly or broadly cuneate, lobes 0, margins coarsely doubly serrate, teeth straight, venation craspedodromous, midvein prominent, veins thin, conspicuous, apex acute or acuminate, rarely rounded, abaxial surface villous, adaxial densely villous glabrescent; leaves at end of vigorous extension shoots broadly ovate, often 9 × 7–8 cm, base broadly rounded or cuneate, lobes usually short, lobe apex broadly acuminate, margins more coarsely serrate, apex acuminate. Inflorescences 5–10-flowered, compact; branches long-matted white-hairy; bracteoles caducous, linear, membranous, margins glandular. Flowers 20–25 mm diam.; hypanthium pubescent; sepals slender, margins minutely glandular-serrate, apex long-acuminate, abaxial surface slightly villous; stamens (5–) 10, anthers rose; styles 3–5, base surrounded by wide ring of pale tomentum. Pomes on slender, drooping, pubescent pedicels, orange-red, suborbicular, 10 mm diam., hairy; flesh yellow, thin, soft; sepals prominent, with short tube, spreading or closely appressed; pyrenes 3–5, 5–6 mm, base rounded, apex narrowed and rounded, dorsally slightly grooved, sides plane.


Phenology: Flowering Apr; fruiting Sep–Oct.
Habitat: Brush, open woods, rocky pastures
Elevation: 100–200 m

Discussion

Crataegus ×latebrosa differs little from C. ×dispessa except in the lower stamen number (5–10) and wider range of style number (3–5). The only record of fruit color says orange-red; reports for C. ×dispessa uniformly declare crimson. The very narrow, caducous bracteoles and the leaf shape of C. ×latebrosa suggest a C. collina × ser. Molles ancestry.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus ×latebrosa"
glabrescent +  and villous +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
James B. Phipps +
Crataegus ×latebrosa Sargent +
compound +  and simple +
opposite +  and alternate +
rounded +  and cuneate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
dark yellow-green +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
ovate +  and oval +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
3cm +  and 6cm +
white-hairy +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ark. +  and Mo. +
not +  and aggregated +
100–200 m +
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 />) +
old +  and new +
puberulous +  and pubescent +
Brush, open woods, rocky pastures +
round-topped +, flat +  and wide +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
7 cm70 mm <br />0.07 m <br /> (8 cm80 mm <br />0.08 m <br />) +
glandular-serrate +  and serrate +
serrate +  and crenate +
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 +
glabrescent +, tomentose +  and hoary +
Flowering Apr +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
orange-red +
10 cm100 mm <br />0.1 m <br /> (?) +
suborbicular +
Rep. (Annual) Missouri Bot. Gard. +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
not arillate +
persistent +
free +  and distinct +
appressed +  and spreading +
triangular +
slender +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus noelensis +
Crataegus ×latebrosa +
Crataegus +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
craspedodromous +
straight +
inconspicuous +
numerous +  and few +
conspicuous +
reddish-brown +