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: 11353

    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 views11353
    Project overview355
    Documents list241
    Taxon list281
    Views for media list234
    Specimen list1997
    Media views6763Media search (721 views); M430639 (120 views); M430618 (123 views); M430654 (118 views); M430666 (99 views); M430617 (122 views); M430645 (118 views); M430646 (114 views); M430651 (118 views); M430653 (113 views); M430663 (116 views); M430630 (128 views); M430656 (120 views); M430627 (120 views); M430631 (127 views); M430643 (115 views); M430662 (119 views); M430650 (119 views); M430619 (126 views); M430620 (121 views); M430621 (121 views); M430622 (128 views); M430623 (121 views); M430624 (120 views); M430625 (127 views); M430626 (120 views); M430628 (125 views); M430629 (126 views); M430632 (128 views); M430633 (125 views); M430634 (121 views); M430635 (119 views); M430636 (113 views); M430637 (116 views); M430638 (120 views); M430640 (119 views); M430641 (112 views); M430642 (117 views); M430644 (115 views); M430647 (117 views); M430648 (113 views); M430649 (114 views); M430652 (115 views); M430655 (115 views); M430657 (117 views); M430658 (120 views); M430659 (114 views); M430660 (115 views); M430661 (118 views); M430664 (116 views); M430665 (117 views); M430667 (102 views);
    Folio views863Folio list (190 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (139 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (139 views); Crataegus douglasii Lindley (allopolyploid) (133 views); Crataegus chrysocarpa Ashe (tetraploid) (131 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (131 views);

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    Total downloads from project37
    Project downloads37