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.

Read the article »

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

Download Project SDD File
Currently Viewing:
MorphoBank Project 2523
  • Creation Date:
    27 August 2016
  • Publication Date:
    11 October 2021
  • Project views: 13916

    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 views13916
    Project overview427
    Documents list289
    Taxon list335
    Views for media list277
    Specimen list2320
    Media views8493Media search (883 views); M430639 (150 views); M430618 (156 views); M430654 (144 views); M430666 (126 views); M430617 (150 views); M430645 (149 views); M430646 (142 views); M430651 (144 views); M430653 (142 views); M430663 (153 views); M430630 (162 views); M430656 (154 views); M430627 (150 views); M430631 (159 views); M430643 (141 views); M430662 (153 views); M430650 (151 views); M430619 (156 views); M430620 (157 views); M430621 (152 views); M430622 (160 views); M430623 (151 views); M430624 (155 views); M430625 (156 views); M430626 (149 views); M430628 (158 views); M430629 (167 views); M430632 (163 views); M430633 (160 views); M430634 (149 views); M430635 (151 views); M430636 (143 views); M430637 (143 views); M430638 (149 views); M430640 (148 views); M430641 (139 views); M430642 (141 views); M430644 (142 views); M430647 (145 views); M430648 (139 views); M430649 (140 views); M430652 (141 views); M430655 (144 views); M430657 (154 views); M430658 (157 views); M430659 (146 views); M430660 (148 views); M430661 (152 views); M430664 (149 views); M430665 (151 views); M430667 (129 views);
    Folio views1033Folio list (223 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (169 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (168 views); Crataegus douglasii Lindley (allopolyploid) (161 views); Crataegus chrysocarpa Ashe (tetraploid) (153 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (159 views);

    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project37
    Project downloads37