Flora of North America species comparison

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Crataegus monogyna

Crataegus turnerorum

aubépine monogyne, common hawthorn, English hawthorn, hawthorn, one-seed hawthorn, singleseed hawthorn

scalp creek hawthorn, turner's hawthorn
Habit Shrubs or trees, 20–60 dm.
Stems

trunk bark gray, plated;

twigs straight or slightly flexuous, new growth glabrous, 1-year old light brown, 2-years old shiny, older pale ashy gray;

thorns on twigs numerous, straight to slightly recurved, 2-years old black, slender, 2–5 cm.
Leaves

deciduous;

petiole 25–33% length of blade, pubescent, eglandular;

blade broadly elliptic to ovate or narrowly obovate, 2–3 cm, thin, base broadly cuneate, lobes 2 or 3 per side, sinuses very shallow, lobe apex subacute to broadly acute, margins serrate except near base, teeth small, acute or subacute, eglandular, venation craspedodromous, veins 3 or 4 per side, apex broadly acute, abaxial surface glabrous, adaxial pubescent young, glabrescent.
Inflorescences

3–12-flowered, flattish, convex panicles;

branches sparsely pubescent or glabrous;

bracteoles caducous, few, very narrowly elliptic, membranous, margins glandular.
Flowers

15 mm diam.;

hypanthium glabrous;

sepals narrowly triangular, ca. 2/3 length of petals, margins ± entire with some stipitate glands to glandular-serrate, adaxial surface pubescent;

stamens 15, anthers purple;

styles 3–5.
Pomes

red, suborbicular (slightly oblate), 10–13 mm diam., glabrous;

flesh mealy;

sepals or sepal remnants spreading;

pyrenes 3–5, dorsally grooved, sides plane.

Crataegus monogyna

Crataegus turnerorum
Phenology Flowers Apr; fruiting Sep–Oct.
Habitat Brush, dwarf oak scrub, stream banks
Elevation 300–600m (1000–2000ft)
Distribution
from FNA
CA; CO; CT; DE; IL; IN; MA; ME; MI; MN; NH; NJ; NY; OH; OR; PA; RI; VT; WA; WI; BC; NB; NS; ON; PE; QC; Europe; w Asia; n Africa [Introduced also in South America, s Africa, Pacific Islands, Australia]
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

Varieties 2 (1 in the flora).

Crataegus monogyna was introduced early to North America to be used for agricultural hedges, a practice now discontinued on this continent.

Cultivar 'Crimson Cloud,' often under an incorrect species name, is widely cultivated as an ornamental.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Crataegus turnerorum is a distinctive and little-varying taxon recorded from at least seven counties in the Edwards Plateau of Texas. It is placed here as it is unassigned to series and may perhaps be a hybrid between the partly sympatric C. greggiana, than which it is much less hairy, with a more or less glabrous small-leaved taxon such as the partly sympatric C. viridis var. desertorum or even a member of ser. Tenuifoliae as discussed in J. B. Phipps (1990). Crataegus turnerorum sometimes has slightly flexuous twigs, which could credibly be inherited from a C. viridis var. desertorum ancestor. However, the nearest existing locality for the ser. Tenuifoliae option is montane New Mexico, even though the Edwards Plateau harbors many woody species with such typically eastern-northeastern ranges as ser. Tenuifoliae.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 497. FNA vol. 9, p. 642.
Parent taxa Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Crataegus > ser. Crataegus Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus
Sibling taxa
C. aemula, C. aestivalis, C. alabamensis, C. alleghaniensis, C. annosa, C. aprica, C. aquacervensis, C. ashei, C. atrovirens, C. attrita, C. austromontana, C. beata, C. berberifolia, C. biltmoreana, C. brachyacantha, C. brainerdii, C. brazoria, C. brittonii, C. buckleyi, C. calpodendron, C. castlegarensis, C. chrysocarpa, C. coccinea, C. coccinioides, C. cognata, C. collina, C. colonica, C. communis, C. compacta, C. condigna, C. craytonii, C. crocea, C. crus-galli, C. cupressocollina, C. delawarensis, C. dispar, C. dodgei, C. douglasii, C. egens, C. egregia, C. enderbyensis, C. erythropoda, C. exilis, C. eximia, C. extraria, C. fecunda, C. flabellata, C. flava, C. florens, C. floridana, C. florifera, C. fluviatilis, C. formosa, C. frugiferens, C. furtiva, C. gattingeri, C. gaylussacia, C. gilva, C. greggiana, C. harbisonii, C. holmesiana, C. ignava, C. incilis, C. integra, C. intricata, C. invicta, C. iracunda, C. irrasa, C. jesupii, C. jonesiae, C. lacrimata, C. laevigata, C. lanata, C. lancei, C. lanuginosa, C. lassa, C. laurentiana, C. leonensis, C. lepida, C. levis, C. lumaria, C. macracantha, C. macrosperma, C. magniflora, C. margarettae, C. marshallii, C. mendosa, C. meridiana, C. mira, C. mollis, C. munda, C. nananixonii, C. neobushii, C. nitida, C. oakesiana, C. okanaganensis, C. okennonii, C. opaca, C. opima, C. orbicularis, C. ouachitensis, C. padifolia, C. pennsylvanica, C. persimilis, C. pexa, C. phaenopyrum, C. phippsii, C. pinetorum, C. populnea, C. prona, C. pruinosa, C. pulcherrima, C. punctata, C. purpurella, C. quaesita, C. reverchonii, C. rivularis, C. rivuloadamensis, C. rivulopugnensis, C. roribacca, C. rubella, C. rubribracteolata, C. saligna, C. sargentii, C. scabrida, C. schizophylla, C. schuettei, C. segnis, C. senta, C. sheila-phippsiae, C. sheridana, C. shuswapensis, C. sororia, C. spathulata, C. spes-aestatum, C. stolonifera, C. stonei, C. submollis, C. suborbiculata, C. succulenta, C. tecta, C. teres, C. texana, C. tracyi, C. triflora, C. turnerorum, C. uniflora, C. ursopedensis, C. venusta, C. viridis, C. visenda, C. wattiana, C. williamsii, C. wootoniana, C. ×atrorubens, C. ×bicknellii, C. ×coleae, C. ×collicola, C. ×disperma, C. ×dispessa, C. ×fretalis, C. ×incaedua, C. ×kelloggii, C. ×latebrosa, C. ×lucorum, C. ×rufula, C. ×sicca, C. ×vailiae
C. aemula, C. aestivalis, C. alabamensis, C. alleghaniensis, C. annosa, C. aprica, C. aquacervensis, C. ashei, C. atrovirens, C. attrita, C. austromontana, C. beata, C. berberifolia, C. biltmoreana, C. brachyacantha, C. brainerdii, C. brazoria, C. brittonii, C. buckleyi, C. calpodendron, C. castlegarensis, C. chrysocarpa, C. coccinea, C. coccinioides, C. cognata, C. collina, C. colonica, C. communis, C. compacta, C. condigna, C. craytonii, C. crocea, C. crus-galli, C. cupressocollina, C. delawarensis, C. dispar, C. dodgei, C. douglasii, C. egens, C. egregia, C. enderbyensis, C. erythropoda, C. exilis, C. eximia, C. extraria, C. fecunda, C. flabellata, C. flava, C. florens, C. floridana, C. florifera, C. fluviatilis, C. formosa, C. frugiferens, C. furtiva, C. gattingeri, C. gaylussacia, C. gilva, C. greggiana, C. harbisonii, C. holmesiana, C. ignava, C. incilis, C. integra, C. intricata, C. invicta, C. iracunda, C. irrasa, C. jesupii, C. jonesiae, C. lacrimata, C. laevigata, C. lanata, C. lancei, C. lanuginosa, C. lassa, C. laurentiana, C. leonensis, C. lepida, C. levis, C. lumaria, C. macracantha, C. macrosperma, C. magniflora, C. margarettae, C. marshallii, C. mendosa, C. meridiana, C. mira, C. mollis, C. monogyna, C. munda, C. nananixonii, C. neobushii, C. nitida, C. oakesiana, C. okanaganensis, C. okennonii, C. opaca, C. opima, C. orbicularis, C. ouachitensis, C. padifolia, C. pennsylvanica, C. persimilis, C. pexa, C. phaenopyrum, C. phippsii, C. pinetorum, C. populnea, C. prona, C. pruinosa, C. pulcherrima, C. punctata, C. purpurella, C. quaesita, C. reverchonii, C. rivularis, C. rivuloadamensis, C. rivulopugnensis, C. roribacca, C. rubella, C. rubribracteolata, C. saligna, C. sargentii, C. scabrida, C. schizophylla, C. schuettei, C. segnis, C. senta, C. sheila-phippsiae, C. sheridana, C. shuswapensis, C. sororia, C. spathulata, C. spes-aestatum, C. stolonifera, C. stonei, C. submollis, C. suborbiculata, C. succulenta, C. tecta, C. teres, C. texana, C. tracyi, C. triflora, C. uniflora, C. ursopedensis, C. venusta, C. viridis, C. visenda, C. wattiana, C. williamsii, C. wootoniana, C. ×atrorubens, C. ×bicknellii, C. ×coleae, C. ×collicola, C. ×disperma, C. ×dispessa, C. ×fretalis, C. ×incaedua, C. ×kelloggii, C. ×latebrosa, C. ×lucorum, C. ×rufula, C. ×sicca, C. ×vailiae
Subordinate taxa
C. monogyna var. monogyna
Synonyms C. secreta
Name authority Jacquin: Fl. Austriac. 3: 50, plate 292, fig. 1. (1775) Enquist: Phytologia 68: 298, fig. 1. (1990)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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