Project 2523: T. A. Dickinson, B. X. Yan, S. Han, M. Zarrei. 2021. Niche Shifts, Hybridization, Polyploidy and Geographic Parthenogenesis in Western North American Hawthorns (Crataegus subg. Sanguineae, Rosaceae). Agronomy. 11 (11):2133.
Specimen: Crataegus suksdorfii (diploid) (Sarg.) Kruschke (ROM/TRT00001806:TRT)
View: Entire leaf


In Crataegus series Douglasianae vein density and other architectural features of foliage leaves vary in manners suggesting different degrees of adaptation to xeric conditions, notably the risk of xylem cavitation and embolism. We document variation in leaf venation in sexual diploids and allopolyploids in which gametophytic self-incompatibility, pseudogamous gametophytic apomixis, and hybridization have apparently also played roles in determining the extents of the geographic ranges of these taxa.

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Article DOI: 10.3390/agronomy11112133

Project DOI: 10.7934/P2523,
This project contains
  • 51 Media
  • 2 Documents
  • 5 Folios
  • 5 Taxa
  • 17 Specimens
Total size of project's media files: 1.04G

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MorphoBank Project 2523
  • Creation Date:
    27 August 2016
  • Publication Date:
    11 October 2021
  • Project views: 24149

    Authors' Institutions

    • University of Toronto

    • Royal Ontario Museum

    • The Hospital for Sick Children, Toronto


    member name taxa specimens media
    Tim Dickinson
    Project Administrator
    Madeleine Milne
    Full membership
    Susan Yan

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    Project views

    type number of views Individual items viewed (where applicable)
    Total project views24149
    Project overview844
    Documents list517
    Taxon list632
    Views for media list552
    Specimen list4147
    Media views14342Media search (1505 views); M430639 (248 views); M430618 (254 views); M430654 (243 views); M430666 (247 views); M430617 (246 views); M430645 (249 views); M430646 (243 views); M430651 (243 views); M430653 (238 views); M430663 (255 views); M430630 (268 views); M430656 (255 views); M430627 (250 views); M430631 (268 views); M430643 (239 views); M430662 (257 views); M430650 (252 views); M430619 (253 views); M430620 (259 views); M430621 (253 views); M430622 (261 views); M430623 (247 views); M430624 (261 views); M430625 (252 views); M430626 (257 views); M430628 (261 views); M430629 (275 views); M430632 (264 views); M430633 (262 views); M430634 (246 views); M430635 (250 views); M430636 (241 views); M430637 (247 views); M430638 (253 views); M430640 (245 views); M430641 (252 views); M430642 (252 views); M430644 (238 views); M430647 (245 views); M430648 (237 views); M430649 (235 views); M430652 (259 views); M430655 (247 views); M430657 (255 views); M430658 (266 views); M430659 (252 views); M430660 (271 views); M430661 (258 views); M430664 (251 views); M430665 (253 views); M430667 (224 views);
    Folio views1953Folio list (402 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (327 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (324 views); Crataegus douglasii Lindley (allopolyploid) (301 views); Crataegus chrysocarpa Ashe (tetraploid) (294 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (305 views);

    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project38
    Project downloads37
    Document downloads1Leaf venation in Pacific Northwest hawthorns (P2523) (1 download);