Difference between revisions of "Crataegus dodgei"

Ashe

J. Elisha Mitchell Sci. Soc. 19: 26. 1903.

Common names: Dodge hawthorn
EndemicSelected by author to be illustrated
Synonyms: Crataegus chrysocarpa var. dodgei (Ashe) E. J. Palmer C. crassifolia Sargent C. delosii Sargent C. dodgei var. flavida (Sargent) P. G. Smith & J. B. Phipps C. dodgei var. rotundata (Sargent) Kruschke C. flavida Sargent C. gravesii unknown C. rotundata unknown
Treatment appears in FNA Volume 9. Treatment on page 603. Mentioned on page 528, 594, 595, 600, 602, 604.
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Revision as of 20:34, 24 September 2019

Shrubs or trees, 50 dm. Stems: twigs: new growth often ± reddish young, glabrous, 1-year old gray-brown, older dull gray; thorns on twigs few to plentiful, straight to ± recurved, 1-year old shiny, dark brown or black, older gray, slender, 2.5–7 cm. Leaves: petiole length 40–60% blade, glabrous, sparsely to densely minutely glandular; blade green, suborbiculate, ± ovate, broadly rhombic to rhombic-ovate, sometimes broadly elliptic, 2–5 cm, thin, base rounded to cuneate, lobes 0 or 1–4 per side, sinuses shallow to moderately deep, lobe apex acute to obtuse, margins crenate-serrate to serrate, veins 4–6 per side, apex subacute to obtuse, abaxial surface glabrous, adaxial glabrate young, soon glabrescent. Inflorescences 6–15-flowered; branches glabrous; bracteoles linear, membranous, margins glandular, larger proximally stipitate-glandular. Flowers 13–18 mm diam.; hypanthium glabrous; sepals narrowly triangular, 5 mm, margins entire or ± glandular-denticulate; stamens 10, anthers ivory; styles 2 or 3. Pomes yellow to yellow-orange, dull orange, or ruddy to red, suborbicular, 7–12 mm diam., glabrous; sepals reflexed; pyrenes 2 or 3. 2n = 51, 68.


Phenology: Flowering Apr; fruiting Sep–Oct.
Habitat: Thickets, successional fields, brush
Elevation: 0–900 m

Distribution

V9 1038-distribution-map.jpg

Ont., Que., Conn., Ill., Ind., Mass., Mich., N.Y., N.C., Ohio, Pa., Va., W.Va., Wis.

Discussion

Crataegus dodgei ranges from Wisconsin and northern Illinois through the southern Great Lakes to Connecticut, and south to West Virginia and the North Carolina Blue Ridge. The southern limits are poorly understood.

Crataegus dodgei is unusually variable in leaf shape, and also variable in plant size, thorn length, and bracteole glandularity. The typical form resembles a ten-stamen C. margarettae, though often with larger and more veiny leaves. It occurs throughout the range of C. dodgei and is usually easily recognizable. An opposite tendency is found in the C. flavida form, which is also common but where the plants are smaller with usually finer thorns and particularly small, usually acutely lobed leaves. Rather scarce forms with larger, proportionately broad, often suborbiculate leaves and obtuse lobes represent the C. delosii form. Still other variants are known.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus dodgei"
James B. Phipps +
Crataegus sect. Rotundifoliae +
Dodge hawthorn +
Ont. +, Que. +, Conn. +, Ill. +, Ind. +, Mass. +, Mich. +, N.Y. +, N.C. +, Ohio +, Pa. +, Va. +, W.Va. +  and Wis. +
0–900 m +
Thickets, successional fields, brush +
Flowering Apr +  and fruiting Sep–Oct. +
J. Elisha Mitchell Sci. Soc. +
Endemic +  and Selected by author to be illustrated +
Crataegus chrysocarpa var. dodgei +, C. crassifolia +, C. delosii +, C. dodgei var. flavida +, C. dodgei var. rotundata +, C. flavida +, C. gravesii +  and C. rotundata +
Crataegus dodgei +
Crataegus (sect. Coccineae) ser. Rotundifoliae +
species +