Crataegus
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                                AuthorityGleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp. 
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                                FamilyRosaceae 
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                                Scientific Name
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                                Discussion[Continued; 4th section.] 
 C. ×puberis Sarg. = C. flabellata × punctata
 C. ×putata Sarg. = C. pruinosa × succulenta
 C. ×randiana Sarg. = C. brainerdii × flabellata C.
 C. ×rotundata Sarg. = C. pruinosa × rotundifolia
 C. ×rubrocarnea Sarg. = C. brainerdii × flabellata
 C. ×shirleyensis Sarg. = C. brainerdii × punctata
 C. ×silvestris Sarg. = C. pruinosa × punctata
 C. ×spatiosa Sarg. = C. pruinosa × succulenta
 C. ×vailiae Britton = C. calpodendron × uniflora
 C. ×vittata Ashe = C. coccinea × flabellata
 C. ×websteri Sarg. = C. brainerdii × calpodendron
 C. ×whitakeri Sarg. = C. calpodendron × mollis
 C. ×xanthophylla Sarg. = C. coccinea × flabellata [Continued]
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                                Common Nameshawthorn