Crataegus florifera

Sargent

Ontario Nat. Sci. Bull. 4: 14. 1908.

Endemic
Synonyms: Crataegus celsa Sargent
Treatment appears in FNA Volume 9. Treatment on page 523. Mentioned on page 516, 522, 574, 635.

Shrubs or trees, 70 dm. Stems: twigs: new growth ± reddish young, soon glabrescent, 1-year old glossy redbrown, 2-years old duller, older dull gray; thorns on twigs at 1-year old shiny, black, stout to ± slender, 4–6 cm. Leaves: petiole length 30–70% blade, slightly pubescent young, glabrescent, eglandular; blade suborbiculate or broadly ovate to obovate, 4–7 cm, base narrowly to broadly cuneate or rounded, lobes 3 or 4 per side, obscure to well-marked, margins serrulate, veins 5 or 6 per side, apex acute, abaxial surface sparsely hairy, densely pubescent along veins, adaxial pubescent (late persistent). Inflorescences 6–10-flowered; branches villous; bracteoles: anthesis late mid season. Flowers 17–20 mm diam.; hypanthium sparsely pilose; sepals narrowly triangular, margins glandular-serrate; stamens 20, anthers rose to dark red; styles 2–4. Pomes deep red, suborbicular, 8–13 mm diam., glabrous; sepals erose or reflexed; pyrenes 2–4, sides plane to erose. 2n = 68.


Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Successional fields, pastures with woody invaders, fencerows
Elevation: 100–300 m

Discussion

Crataegus florifera is frequent in western southern Ontario.

There appear to be two main entities here: typical florifera (= Crataegus celsa), plausibly of hybrid origin between C. punctata and C. succulenta (E. J. Palmer 1952), with narrower, somewhat obovate leaves and petiole length 30–40% blade, and a sylvestris type, named for the later homonym C. sylvestris Sargent, with much broader leaves and petiole length often 50–70% blade.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus florifera"
pubescent +  and hairy +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
rose +  and dark red +
James B. Phipps +
Sargent +
compound +  and simple +
opposite +  and alternate +
rounded +  and cuneate +
Crataegus sect. Anomalae +
less ovate or rhombic-elliptic +  and rhombic-elliptic +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
broadly ovate +  and obovate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ont. +  and N.Y. +
not +  and aggregated +
100–300 m +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 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 +, redbrown +  and reddish +
older +, old +, young +  and new +
glabrescent +
dull +, duller +  and glossy +
Successional fields, pastures with woody invaders, fencerows +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
craspedodromous +
obscure +  and well-marked +
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 +
post-mature +
pubescent +
Flowering May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
suborbicular +
Ontario Nat. Sci. Bull. +
not arillate +
persistent +
free +  and distinct +
glandular-serrate +  and subentire +
triangular +
1-50-flowered +  and few-leaved +
pitted +  and erose +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus celsa +
Crataegus florifera +
Crataegus (sect. Macracanthae) ser. Anomalae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
stout +  and more or less slender +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
reddish-brown +  and dark +
determinate +
stout +  and more or less slender +
6 +  and 5 +
tree +  and shrub +