Crataegus chrysocarpa var. chrysocarpa

Endemic
Synonyms: Crataegus coloradoides Ramaley C. doddsii Ramaley C. rotundifolia var. pubera Sargent
Treatment appears in FNA Volume 9. Treatment on page 598. Mentioned on page 597, 599, 600.

Shrubs, 20–30 dm. Leaves: blade ± ovate to rhombic-ovate, base ± cuneate, sinuses: max LII 15–20%, lobe apex acute, veins 3–5 per side, abaxial surface glabrous, sometimes hairy on veins or hairy young, glabrescent, adaxial appressed-short-pubescent, glabrescent. Inflorescences: branches sparsely to densely villous. Flowers 15–20 mm diam.; hypanthium densely villous; stamens 10, anthers cream or ivory. Pomes red (darkened to burgundy only if dried and shriveled), suborbicular to broadly ellipsoid, 8–10 mm diam., hairy.


Phenology: Flowering May–Jun; fruiting Sep–Oct.
Habitat: Well-drained mesic sites with high light intensity, under aspen
Elevation: 0–2200 m

Distribution

V9 1022-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask., Colo., Conn., Iowa, Maine, Mass., Mich., Minn., Mont., N.H., N.Y., N.Dak., Oreg., R.I., S.Dak., Utah, Vt., Wash., Wis., Wyo.

Discussion

Variety chrysocarpa occurs through nearly the whole range of the species. Through most of its range the leaves are 2–4(–7.5) cm and ovate to rhombic-ovate. A variant with smaller leaves, glabrous surfaces, densely tomentose inflorescence branches, and early salmon-orange, eventually crimson, ellipsoid pomes has been found scattered in the valleys of southern British Columbia and into Alberta. Its range is not understood because it can be difficult to determine fruit shape from herbarium specimens. Forms with larger leaves (to 6–8 cm) are not infrequent in Newfoundland, Quebec, and northern New England, paralleling a similar situation in Crataegus macrosperma; occasional narrowly elliptic-leaved forms occur in Prince Edward Island. Taller and more treelike variants are known from Maine. Some specimens, particularly from Minnesota, have a thin, non-persistent abaxial surficial indumentum. Such specimens are abundant in some areas and, except for leaf shape, seem to represent intergradation with var. faxonii.

Selected References

None.

Lower Taxa

None.
glabrescent +, hairy +  and glabrous +
appressed-short-pubescent +, glabrescent +  and hairy +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
ivory +  and cream +
James B. Phipps +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
Crataegus sect. Rotundifoliae +
5 cm50 mm <br />0.05 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
purplish +  and yellow +
less ovate +  and rhombic-ovate +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
elliptic +  and linear +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Colo. +, Conn. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, N.H. +, N.Y. +, N.Dak. +, Oreg. +, R.I. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wis. +  and Wyo. +
not +  and aggregated +
0–2200 m +
1.5 cm15 mm <br />0.015 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 />) +
yellowish +  and greenish brown or gray-brown +
appressed-pubescent +
Well-drained mesic sites with high light intensity, under aspen +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
stipitate-glandular +
deciduous +
glandular-serrate +  and serrate +
short-stipitate-glandular +
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 +
Flowering May–Jun +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
suborbicular +  and broadly ellipsoid +
Bull. North Carolina Agric. Exp. Sta. +
nonaccrescent +
not arillate +
persistent +
free +  and distinct +
appressed +  and erect +
spreading +  and reflexed +
triangular +
4 cm40 mm <br />0.04 m <br /> (?) +
1-50-flowered +  and few-leaved +
concave +  and plane +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus coloradoides +, C. doddsii +  and C. rotundifolia var. pubera +
Crataegus chrysocarpa var. chrysocarpa +
Crataegus chrysocarpa +
variety +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
black +  and dark mahogany +
straight +
less slender +  and more or less stout +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
3 +  and 5 +