Crataegus pruinosa var. parvula

(Sargent) J. B. Phipps

Canad. J. Bot. 58: 1684. 1980.

Endemic
Basionym: Crataegus parvula Sargent Crataegus S. Michigan, 527. 1907
Treatment appears in FNA Volume 9. Treatment on page 576. Mentioned on page 575.

Shrubs, 20–30 dm, usually branched to base. Leaves: blade broadly rhombic, 2–4 cm widest in middle, length/width = 1.5, lobes 2–4 per side, sinuses shallow, lobe apex acute, base broadly cuneate, adaxial surface glabrous, sometimes sparsely appressed-hairy along veins. Inflorescence branches glabrous. Flowers 15–22 mm diam.; stamens 20, anthers pale-pink.


Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Brush, successional fields, unmanaged pastures
Elevation: 20–300 m

Distribution

V9 980-distribution-map.jpg

Ont., Mass., Mich., N.Y., N.C., Va.

Discussion

Variety parvula is scattered through the northern range of the species and at higher elevations south into the Appalachians; it is characterized by smaller leaves that usually are very shallowly incised.

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 />) +
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 +
(Sargent) J. B. Phipps +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
Crataegus parvula +
6 cm60 mm <br />0.06 m <br /> (7 cm70 mm <br />0.07 m <br />) +
mid +  and dark green +
rhombic +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
villous +  and glabrous +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ont. +, Mass. +, Mich. +, N.Y. +, N.C. +  and Va. +
not +  and aggregated +
20–300 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 +
Brush, successional fields, unmanaged pastures +
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 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 +
Canad. J. Bot. +
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 +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
Crataegus pruinosa var. parvula +
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 +