Flora of North America species comparison

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Crataegus scabrida

aubépine scabride, rough hawthorn, scabrous hawthorn
Habit Shrubs, 30–50 dm.
Stems

twigs: new growth reddish early, glabrous, 1-year old deep tan, 2-years old tan to deep reddish brown, older dull gray;

thorns on twigs at 1-year old shiny, dark brown to nearly black, stout or slender, 4–6 cm.
Leaves

petiole slender, length 40–60% blade, sparsely pubescent or glabrous, eglandular or sessile-glandular;

blade short-ovate to ovate, broadly elliptic to narrowly rhombic, or ± trullate, 3–8 cm, base rounded to cuneate, lobes 3–5 per side, margins serrate, veins 5–7(or 8) per side, apex acute, abaxial surface glabrous, adaxial sparsely to densely appressed-pubescent young, glabrescent.
Inflorescences

6–10-flowered;

branches glabrous or villous.
Flowers

15–18 mm diam.;

hypanthium glabrous or pubescent;

sepals narrowly triangular, margins subentire or glandular-serrate;

stamens 7 or 8(–10), anthers pink;

styles 3 or 4.
Pomes

reddish or orange-red, suborbicular, 6–9 mm diam., pruinose, glabrous or slightly pubescent;

sepals spreading to ± erose;

pyrenes 2–4, sides often pitted.
2n

= 51.

Crataegus scabrida
Distribution
from FNA
CT; MA; ME; MI; NH; NY; VA; VT; WI; NB; NS; ON; QC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 4 (4 in the flora).

Crataegus scabrida is variable in leaf shape and size, as well as in pubescence of adaxial leaf surfaces and pedicels. The species falls into four reasonably well-marked varieties, only the first two of which are frequent. The range of the species as a whole is somewhat poorly documented because of frequent incorrect identification.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Inflorescence branches glabrous
→ 2
1. Inflorescence branches villous
→ 3
2. Leaf blades ovate to narrowly rhombic, 4–7 cm.
var. scabrida
2. Leaf blades broadly elliptic, 3–5 cm.
var. cyclophylla
3. Leaf blades trullate or broadly trullate, 5–8 cm.
var. asperifolia
3. Leaf blades short-ovate to broadly elliptic, 4 cm.
var. egglestonii
Source FNA vol. 9, p. 523.
Parent taxa Rosaceae > subfam. Amygdaloideae > tribe Maleae > Crataegus > sect. Macracanthae > ser. Anomalae
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. 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. 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
Subordinate taxa
C. scabrida var. asperifolia, C. scabrida var. cyclophylla, C. scabrida var. egglestonii, C. scabrida var. scabrida
Synonyms C. brainerdii var. scabrida
Name authority Sargent: Rhodora 3: 29. (1901)
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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