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: 7682

    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

    Project has no matrices defined.

    Project views

    type number of views Individual items viewed (where applicable)
    Total project views7682
    Project overview254
    Documents list172
    Taxon list194
    Views for media list159
    Specimen list1333
    Media views4637Media search (495 views); M430639 (86 views); M430618 (86 views); M430654 (86 views); M430666 (67 views); M430617 (83 views); M430645 (85 views); M430646 (81 views); M430651 (85 views); M430653 (77 views); M430663 (76 views); M430630 (86 views); M430656 (77 views); M430627 (82 views); M430631 (83 views); M430643 (82 views); M430662 (75 views); M430650 (84 views); M430619 (86 views); M430620 (83 views); M430621 (82 views); M430622 (88 views); M430623 (82 views); M430624 (82 views); M430625 (87 views); M430626 (82 views); M430628 (82 views); M430629 (83 views); M430632 (84 views); M430633 (81 views); M430634 (83 views); M430635 (84 views); M430636 (82 views); M430637 (82 views); M430638 (85 views); M430640 (87 views); M430641 (79 views); M430642 (83 views); M430644 (83 views); M430647 (84 views); M430648 (82 views); M430649 (81 views); M430652 (81 views); M430655 (83 views); M430657 (76 views); M430658 (77 views); M430659 (76 views); M430660 (76 views); M430661 (78 views); M430664 (75 views); M430665 (76 views); M430667 (66 views);
    Folio views544Folio list (126 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (84 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (84 views); Crataegus douglasii Lindley (allopolyploid) (84 views); Crataegus chrysocarpa Ashe (tetraploid) (85 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (81 views);

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    Total downloads from project37
    Project downloads37