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: 16797

    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 views16797
    Project overview540
    Documents list355
    Taxon list432
    Views for media list362
    Specimen list2796
    Media views10112Media search (1065 views); M430639 (175 views); M430618 (181 views); M430654 (170 views); M430666 (168 views); M430617 (173 views); M430645 (174 views); M430646 (167 views); M430651 (169 views); M430653 (162 views); M430663 (185 views); M430630 (193 views); M430656 (187 views); M430627 (177 views); M430631 (193 views); M430643 (167 views); M430662 (186 views); M430650 (176 views); M430619 (179 views); M430620 (185 views); M430621 (177 views); M430622 (188 views); M430623 (174 views); M430624 (180 views); M430625 (178 views); M430626 (180 views); M430628 (190 views); M430629 (199 views); M430632 (196 views); M430633 (193 views); M430634 (172 views); M430635 (178 views); M430636 (168 views); M430637 (172 views); M430638 (174 views); M430640 (172 views); M430641 (171 views); M430642 (172 views); M430644 (166 views); M430647 (167 views); M430648 (164 views); M430649 (162 views); M430652 (175 views); M430655 (171 views); M430657 (185 views); M430658 (192 views); M430659 (179 views); M430660 (185 views); M430661 (187 views); M430664 (178 views); M430665 (183 views); M430667 (152 views);
    Folio views1270Folio list (282 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (214 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (207 views); Crataegus douglasii Lindley (allopolyploid) (194 views); Crataegus chrysocarpa Ashe (tetraploid) (182 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (191 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);