Crataegus castlegarensis |
Crataegus levis |
|
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Castlegar hawthorn, Castlegar hawthorne, hawthorn |
smooth hawthorn |
|
Habit | Shrubs, 25–50 dm. | Shrubs, 30–50 dm. |
Stems | erect; branches spreading; 1-year old twigs brown; thorns on twigs usually branched, some paired or in triads, straight to slightly recurved, dark brown with blackish tip young, 2–3 cm. |
twigs: new growth reddish, glabrous, 1-year old brown, older dark to paler gray; thorns on twigs straight to recurved, 2-years old shiny dark brown, ± slender, 3–5 cm. |
Leaves | petiole 0.7–1.5 cm, pubescent, eglandular; blade oblanceolate to ovate-rhombic, 3.5–6 cm, lobes 3 or 4 per side, sinuses shallow to deep, lobe apex usually acute, margins serrate, teeth apices finally glandular young, venation craspedodromous, veins 4 or 5 per side, apex broadly triangular, abaxial surface sparsely hairy or glabrous except on veins, adaxial conspicuously appressed-pubescent young, glabrescent except on midvein. |
petiole 1.5–3 cm, pubescence not recorded, eglandular or sparsely glandular; blade ovate, 3–6 cm, very thin, base rounded or broadly cuneate, lobes 3 or 4(or 5) per side, sinuses deep, angled, lobe apex at least proximal, not aligned, usually acuminate, margins serrate, proximal teeth gland-tipped, veins 4 or 5 per side, apex acute, abaxial surface glabrous, adaxial short-pubescent young, soon glabrescent. |
Inflorescences | 12–20-flowered; branches sparsely to densely pubescent; bracteole margins stipitate-glandular. |
5–8-flowered; branches glabrous; bracteoles absent or few, margins glandular. |
Flowers | 12 mm diam.; hypanthium pubescent or glabrous; sepals triangular, 3 mm, margins remotely glandular-serrate; stamens 10, anthers pink; styles 3 or 4. |
15–17 mm diam.; hypanthium glabrous; sepals basally broadly triangular (lamina nearly linear), 6 mm, margins entire, abaxially glabrous; stamens 10, anthers rose-red; styles 4. |
Pomes | crimson (mid Aug) turning to reddish plum or, ultimately, blackish purple, orbicular, ± oblate (recessed at junction with pedicel), 10 mm diam., sparsely pilose; sepals reflexed, apex obtuse; pyrenes 3 or 4, sides usually pitted. |
red, ± pyriform, 8–10 mm diam., flesh hard; sepals spreading; pyrenes 4, dorsally grooved. |
2n | = 68. |
|
Crataegus castlegarensis |
Crataegus levis |
|
Phenology | Flowering May–Jun; fruiting Sep–Oct. | Flowering Apr–May; fruiting Sep–Oct. |
Habitat | Mesic brush | Open woods, brush |
Elevation | 300–1200 m (1000–3900 ft) | 50–300 m (200–1000 ft) |
Distribution |
CA; ID; MT; OR; UT; WA; WY; AB; BC; SK
|
MA; NC; NY; OH; PA |
Discussion | Crataegus castlegarensis occurs from around the northern Okanagan, British Columbia, to the northern California Coast Ranges, to northwestern Montana, and the Rocky Mountains to northeast of Salt Lake City, Utah. The species occurs also in the Cypress Hills of Alberta and Saskatchewan; it is found in habitats similar to those of C. douglasii and is at least as abundant as that species in a number of parts of its range. Crataegus castlegarensis is readily recognized by a combination of hairy inflorescence branches, pomes more or less orbicular, crimson or burgundy (with irregular earlier ripening) around the third week of August, soon becoming purple, often when nearby C. douglasii is already black, as well as a tendency to possess thorns on the young twigs branched at the base to become double, triple, or even sometimes quadruple. Such multiple thorns, though sometimes abundant on a bush, are more often few and may require searching for. Inflorescence pubescence, as in other species with this characteristic, may become sparse by fruiting. Crataegus castlegarensis is most similar to C. douglasii; its fruit is usually more orbicular, even oblately so, than is normal in that species, sometimes even with a recessed junction to the pedicel like an apple. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Crataegus levis ranges from the southern Great Lakes area to southern New England, to Ohio, Pennsylvania, and in mountains to North Carolina. Crataegus levis is often confused with the C. compta form of C. populnea; that taxon usually has slightly larger, more coriaceous leaves, with less acute lobes than C. levis. Crataegus levis is possibly a hybrid of C. macrosperma × C. pruinosa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 513. | FNA vol. 9, p. 571. |
Parent taxa | Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Douglasia > ser. Douglasianae | Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Coccineae > ser. Populneae |
Sibling taxa | ||
Synonyms | C. laetans, C. milleri | |
Name authority | J. B. Phipps & O'Kennon: Sida 20: 121, figs. 3, 4. (2002) | Sargent: Rhodora 7: 198. (1905) |
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