Contains 10 accepted taxa overall.
Characteristics
Classification
Citation
CRATAEGUS Linnaeus, Sp. Pl. 475. 1753, nom. cons. vs. Mespilus Linnaeus 1753.
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TYPE: Crataegus oxyacantha Linnaeus, nom. rej. Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 294. 1913; M. L. Green, Prop. Brit. Bot. 158. 1929.
Species
| Scientific Name | Common Name | Status | Photos |
|---|---|---|---|
| Crataegus aestivalis | MAY HAW; MAY HAWTHORN | Native OBL (NWPL) OBL (DEP) | |
| Crataegus crus-galli | COCKSPUR HAWTHORN | Native FAC (NWPL) | |
| Crataegus flava | YELLOWLEAF HAWTHORN; BEAUTIFUL HAWTHORN; SARGENT'S HAWTHORN | Native FAC (NWPL) | |
| Crataegus marshallii | PARSLEY HAWTHORN | Native FAC (NWPL) FACW (DEP) | |
| Crataegus michauxii | MICHAUX'S HAWTHORN | Native | |
| Crataegus opaca | RIVERFLAT HAWTHORN; WESTERN MAYHAW | Native OBL (NWPL) | |
| Crataegus phaenopyrum | WASHINGTON HAWTHORN | Native Endangered-State FAC (NWPL) | |
| Crataegus spathulata | LITTLEHIP HAWTHORN | Native FAC (NWPL) | |
| Crataegus uniflora | DWARF HAWTHORN | Native | |
| Crataegus viridis | GREEN HAWTHORN | Native FACW (NWPL) FACW (DEP) |
[Family identification key]
1. Proximal vein axils of leaf blade undersides cavernous, forming pubescent (rarely glabrate) pockets (domatia)
2
1. Proximal vein axils of leaf blades undersides flush with the rest of the blade, glabrous (midrib and secondary veins sometimes sparsely pilose)
5
2. Pedicels short, <4 mm long
3
2. Pedicels long, >4 mm long
4
3. Midribs and veins glabrous except for pale pubescence around domatia
3. Midribs and veins of underside of leaves densely rufous pubescent
4. Upper and lower sides of leaf blades pubescent, rarely glabrate; leaf blade marginal glands prominent
4. Upper and lower sides of leaf blades glabrate except for pubescence around domatia; leaf blade marginal glands obscure
5. Leaf blades broadest near the base
6
5. Leaf blades broadest above the middle
8
6. Leaf blades pinnately dissected-lobed, sinuses nearly reaching midrib
6. Leaf blades shallowly lobed, sinus less than halfway to midrib
7
7. Leaf blades with 2 lateral lobes, the lobe tips acuminate; ovary 4-5 mm wide, fruits 8-10 mm wide
7. Leaf blades weakly lobed, the lobe tips acute; ovary 2-3 mm wide, fruits 4-5 mm wide
8. Pedicels short, 1-3 mm long; sepals often coarsely dentate with teeth >0.5 mm long
8. Pedicels long, >4 mm long; sepals entire to weakly dentate with teeth <0.5 mm long
9
9. Pedicel pubescent; sepals narrowly acute, 3-4 mm long; fruit >4 mm wide
9. Pedicel glabrous; sepals deltoid, 1-2 mm long; fruit 3-4 mm wide