Crataegus ×incaedua

Crataegus ×incaedua Sargent

Trees & Shrubs 2: 3, plate 102. 1907.

Endemic
Treatment appears in FNA Volume 9. Treatment on page 638. Mentioned on page 543, 639.

Shrubs or trees, 50–70 dm. Stems: twigs: new growth pubescent, 1-year old light gray-brown, older grayish; thorns on twigs numerous, 1-year old bright chestnut-brown, slender, 4–7 cm. Leaves: petiole length 20% blade, villous early, glabrescent; blade narrowly obovate, 5–6 cm, base narrowly cuneate, lobes 0, margins serrulate, venation camptodromous, veins 4–6 per side, apex acute, abaxial surface veins villous, adaxial soft-white-hairy young, glabrescent. Inflorescences 12–20-flowered; branches puberulent; bracteoles ± persistent, numerous, very narrow, membranous, margins glandular. Flowers 14–15 mm diam.; hypanthium densely villous; sepals narrowly triangular, margins glandular-serrate; stamens 10–15, anthers cream; styles 2 or 3. Pomes yellowish red, suborbicular, 9–10 mm diam., punctate, glabrous; sepals narrow, ± reflexed; pyrenes 2, dorsally grooved, sides plane.


Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Gravelly stream beds
Elevation: 150–200 m

Discussion

Crataegus ×incaedua is similar to C. collina var. sordida except for the cream anthers and two or three styles and pyrenes; it probably is a hybrid of C. collina with C. calpodendron, according to E. J. Palmer (1952).

Selected References

None.

Lower Taxa

None.
... more about "Crataegus ×incaedua"
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
James B. Phipps +
Crataegus ×incaedua Sargent +
compound +  and simple +
opposite +  and alternate +
cuneate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
obovate +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ark. +, Ind. +  and Mo. +
not +  and aggregated +
150–200 m +
1.4 cm14 mm <br />0.014 m <br /> (1.5 cm15 mm <br />0.015 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 />) +
grayish +  and light gray-brown +
older +, old +  and new +
Gravelly stream beds +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
camptodromous +
glandular-serrate +  and serrulate +
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 +
Flowering May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
yellowish red +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
suborbicular +
Trees & Shrubs +
not arillate +
persistent +
free +  and distinct +
triangular +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
glabrescent +, soft-white-hairy +  and villous +
Crataegus ×incaedua +
Crataegus +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
bright chestnut-brown +
slender +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
4 +  and 6 +
tree +  and shrub +