Crataegus castlegarensis |
Crataegus pennsylvanica |
|
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Castlegar hawthorn, Castlegar hawthorne, hawthorn |
Pennsylvania hawthorn, Pennsylvania thorn |
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Habit | Shrubs, 25–50 dm. | Shrubs or trees, 70–80 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. |
trunk bark newly exposed orange-brown, older buff, fibrous, checked into longitudinal plates; twigs: new growth densely pubescent, 1-year old fawn, older gray; thorns on twigs absent or few, usually recurved, 2-years old shiny dark brown to blackish, stout to more 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. |
stipules axillary, circinate, herbaceous, gland-bordered; petiole relatively slender, stouter than C. coccinea, length 30–35% blade, densely pubescent young, sparsely mature, often sparsely stipitate-glandular; blade broadly ovate to ovate-deltate, 6–10 cm, slightly coriaceous, base broadly cuneate to truncate, lobes 4–6 per side, sinuses shallow, lobe apex acute to obscure, margins sharply serrate, teeth at base often stipitate-glandular, veins 5–7 per side, apex acute, abaxial surface sparsely scabrous-pubescent young, glabrescent, veins hairy mature, adaxial densely appressed-scabrous young. |
Inflorescences | 12–20-flowered; branches sparsely to densely pubescent; bracteole margins stipitate-glandular. |
8–20-flowered; branches tomentose; bracteoles variably persistent, linear-lanceolate, membranous to (larger) ± herbaceous, 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. |
17–21 mm diam.; hypanthium densely tomentose; sepals narrowly triangular, 7–8 mm, margins glandular-laciniate, abaxially glabrate; stamens 5 or 6, or 10, anthers cream to pale pink or salmon; styles 4 or 5. |
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. |
bright red, suborbicular, 10–12 mm diam., densely villous; sepals prominent, erect-patent; pyrenes 4 or 5. |
2n | = 68. |
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Crataegus castlegarensis |
Crataegus pennsylvanica |
|
Phenology | Flowering May–Jun; fruiting Sep–Oct. | Flowering May–Jun; fruiting Sep–Oct. |
Habitat | Mesic brush | Brush, successional fields, open woodlands, fencerows |
Elevation | 300–1200 m (1000–3900 ft) | 10–200 m (0–700 ft) |
Distribution |
CA; ID; MT; OR; UT; WA; WY; AB; BC; SK
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DE; NC; NY; OH; PA; ON |
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 pennsylvanica ranges mainly to the south of C. submollis and may be locally common. A highly disjunct record from North Carolina (Buncombe County) appears unequivocal. Crataegus pennsylvanica has been confused with C. mollis and various members of ser. Coccineae. Except for a small overlap in northeastern Ohio, its range lies outside that of C. mollis. Crataegus pennsylvanica is more similar to C. submollis, from which it differs by its less variable leaves (usually broadly ovate, more or less truncate, relatively large), by its much less thorny nature, by its indumentum on young parts being tomentose rather than densely pubescent, and by its being more treelike (C. submollis is usually a shrub). Thorns are absent or sparse on older trees. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 513. | FNA vol. 9, p. 557. |
Parent taxa | Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Douglasia > ser. Douglasianae | Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Coccineae > ser. Molles |
Sibling taxa | ||
Synonyms | C. tatnalliana | |
Name authority | J. B. Phipps & O'Kennon: Sida 20: 121, figs. 3, 4. (2002) | Ashe: Ann. Carnegie Mus. 1: 394. (1902) |
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