Crataegus pruinosa var. pruinosa

IllustratedEndemic
Synonyms: Crataegus bracteata Sargent C. mackenziei var. bracteata (Sargent) E. J. Palmer C. tumida Sargent
Treatment appears in FNA Volume 9. Treatment on page 575. Mentioned on page 577, 642.

Shrubs or trees, 20–70 dm, usually branched to base. Leaves: blade ovate or ovate-oblong to narrowly deltate, 4–6 cm, length/width = 1.5, lobes 2–4 per side, lobe apex acute, base broadly cuneate to subtruncate, adaxial surface glabrous, sometimes sparsely appressed-hairy along veins. Inflorescence branches glabrous. Flowers 15–22 (–25) mm diam.; stamens 20, anthers pale-pink, rarely red.


Phenology: Flowering Apr–May; fruiting Sep–Oct.
Habitat: Open scrub, light woodland shade
Elevation: 20–1300 m

Distribution

V9 978-distribution-map.jpg

Ont., Que., Conn., Ill., Ind., Iowa, Kans., Ky., Maine, Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Tenn., Vt., Va., W.Va., Wis.

Discussion

Variety pruinosa is common through the northern range of the species, mainly north of southern Missouri and the Ohio River; it is found southward at middle and higher elevations in the Appalachians. Crataegus bracteata from Missouri is somewhat atypical; the adaxial leaf surfaces are briefly soft-pubescent, and the abaxial midrib permanently hairy. With its somewhat large leaves (5–6 cm) and slightly glandular sepal margins, as well as its very conspicuous bracteoles, it probably represents introgression with C. coccinioides. A red-anthered variant of var. pruinosa with a more deltate-ovate leaf shape, perhaps matching Crataegus tumida, has been collected from New York.

Selected References

None.

Lower Taxa

None.
appressed-hairy +  and glabrous +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
red +  and pale-pink +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
mauve +  and pink +
James B. Phipps +
(H. L. Wendland) K. Koch +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
broadly cuneate +  and subtruncate +
Mespilus pruinosa +
6 cm60 mm <br />0.06 m <br /> (7 cm70 mm <br />0.07 m <br />) +
mid +  and dark green +
ovate-oblong +  and narrowly deltate +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
villous +  and glabrous +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ont. +, Que. +, Conn. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Mich. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
not +  and aggregated +
20–1300 m +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 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 />) +
paler +, gray +, purple-brown +  and reddish-brown +
older +, old +  and new +
Open scrub, light woodland shade +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
sessile +  and craspedodromous +
glandular-serrate +  and serrate +
subentire +
glabrous +  and short-stipitate-glandular +
subentire +  and entire +
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 +
glandular +
Flowering Apr–May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
scarlet +, bright crimson +  and greenish +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
suborbicular +
Hort. Dendrol., +
not arillate +
persistent +
free +  and distinct +
triangular +
nonaccrescent +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1-50-flowered +  and few-leaved +
Illustrated +  and Endemic +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
Crataegus bracteata +, C. mackenziei var. bracteata +  and C. tumida +
Crataegus pruinosa var. pruinosa +
Crataegus pruinosa +
variety +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
purple +  and shiny black +
straight +
slender +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
6 +  and 5 +
tree +  and shrub +