Crataegus brachyacantha |
Crataegus ×collicola |
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blueberry haw, blueberry hawthorn, hoghaw, pomette bleue |
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Habit | Shrubs or trees, 60–100(–150) dm. | Shrubs or trees, 50–80 dm. |
Stems | trunk bark dark gray-brown, plated; thorns on twigs absent or present, recurved, short, to 1.5 cm. |
twigs: new growth glabrous or densely pubescent young, 1-year old gray-brown, older grayish; thorns on twigs numerous, dark chestnut brown, older gray, slender, 2–8 cm. |
Leaves | petiole length 15–30% blade; blade elliptic, 2–3 cm, coriaceous, shiny, lobes 0, margins crenate, venation camptodromous, veins 5 or 6(–8) per side, abaxial surface glabrous, adaxial sparingly appressed-hairy, hairy on midvein, sometimes to sinuses. |
petiole length 20–25% blade, pubescent, glandular; blade narrowly obovate, 3.5–5 cm, base narrowly cuneate, lobes 0, or 2 or 3 per side, sinuses shallow, lobe apex acute, margins serrulate, teeth 0.5–0.7 mm, venation camptodromous, veins 3–6 per side, apex acute, ± lustrous, abaxial surface villous on veins, adaxial soft-white-hairy young, becoming sparsely scabrous. |
Inflorescences | 15–25-flowered; branches glabrous; bracteoles caducous, narrow, small, membranous, margins eglandular, nearly glabrous. |
6–14-flowered; branches glabrous or sparsely pubescent; bracteoles caducous, numerous, reddish, very narrow, membranous, margins glandular. |
Flowers | 12 mm diam.; hypanthium glabrous; sepals triangular, 1.5 mm; stamens 20, anthers cream to orange, 0.5 mm; styles 4 or 5. |
18 mm diam.; hypanthium densely villous; sepals narrowly triangular, margins entire or sparsely glandular-serrate; stamens 20, anthers rose; styles 3–5. |
Pomes | black to bluish black, pruinose, oblate-orbiculate, 8–14 mm diam.; flesh mealy; fruiting calyx suberect, on small collar, sepal tips often reflexed; pyrenes 4 or 5, dorsally slightly grooved, sides plane. |
orange to dull-red or dark red, depressed orbicular to orbicular, 8–13 mm diam., pubescent young; sepals small, erose or ± patent; pyrenes 3–5, dorsally grooved, sides plane. |
2n | = 34, 51. |
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Crataegus brachyacantha |
Crataegus ×collicola |
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Phenology | Flowering Apr; fruiting Sep–Nov. | Flowering May; fruiting Sep–Oct. |
Habitat | Wet prairies, alluvial flats, well-drained mesic sites, woodland margins | Fertile ground along streams, fields, dry pastures in mountains |
Elevation | 10–200 m (0–700 ft) | 100–1000 m (300–3300 ft) |
Distribution |
AR; GA; LA; MS; OK; TX
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AR; KY; MO; NC; VA |
Discussion | Crataegus brachyacantha occurs throughout Louisiana, where it is locally common, and in the adjacent parts of all surrounding states. A disjunct population was known in Georgia but it cannot be found there now. The species is seemingly more shade tolerant than many other hawthorns. Crataegus brachyacantha is among the taller hawthorns in North America; its petals turn orange with age or on drying. The short, recurved thorns and bitter, oblate-orbiculate, black fruit also are distinctive and help to distinguish C. brachyacantha from C. saligna of Colorado and Utah (ser. Cerrones), which is similar in foliage and flower. The names blueberry haw and pomette bleue may have a special appropriateness about late August when the waxy covering of the fruit is still thick and the underlying color is a dark purple. At maturity, the flesh is thin and bitter and the skin usually black. The fall foliage, brilliant lustrous orange, bronze, and red, suggests potential ornamental use. Forma leucocarpa Sargent is a white-fruited form, which was collected by E. J. Palmer at Natchitoches, Louisiana, September 1915; it is the only recorded white-fruited hawthorn. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Crataegus ×collicola and C. ×verruculosa are two different putative hybrids, both of which are expected to possess parentage suggested by E. J. Palmer (1952) of C. collina and C. crus-galli. Crataegus ×collicola has thorns 4–8 mm, young twigs glabrous, leaf blade broadly elliptic to obovate, 2 or 3 lobes, and 4–6 veins per side, glabrous inflorescence branches, entire sepal margins, and pomes orange to dull red, depressed orbicular, and 8–11 mm diam. Crataegus ×verruculosa has thorns 2–2.5 mm, young twigs hairy, leaf blades narrowly obovate, unlobed, veins 3–5 per side, hairy inflorescence branches, sparingly glandular-serrate sepal margins, and pomes dark red, orbicular, 10–13 mm diam. If these are considered to be the same hybrid species, separate nothovariety names should be erected to maintain distinction. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 501. | FNA vol. 9, p. 637. |
Parent taxa | Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Brevispinae > ser. Brevispinae | Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus |
Sibling taxa | ||
Synonyms | C. collina var. collicola, C. ×verruculosa | |
Name authority | Sargent & Engelmann: Bot. Gaz. 7: 128. (1882) | Crataegus ×collicola Ashe: J. Elisha Mitchell Sci. Soc. 16: 75. (1900) — as species |
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