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: 21521

    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 views21521
    Project overview749
    Documents list453
    Taxon list558
    Views for media list482
    Specimen list3621
    Media views12884Media search (1339 views); M430639 (225 views); M430618 (229 views); M430654 (218 views); M430666 (219 views); M430617 (223 views); M430645 (223 views); M430646 (217 views); M430651 (217 views); M430653 (209 views); M430663 (232 views); M430630 (241 views); M430656 (234 views); M430627 (223 views); M430631 (240 views); M430643 (215 views); M430662 (234 views); M430650 (224 views); M430619 (226 views); M430620 (233 views); M430621 (224 views); M430622 (234 views); M430623 (221 views); M430624 (234 views); M430625 (226 views); M430626 (228 views); M430628 (237 views); M430629 (249 views); M430632 (243 views); M430633 (237 views); M430634 (220 views); M430635 (228 views); M430636 (214 views); M430637 (223 views); M430638 (226 views); M430640 (221 views); M430641 (230 views); M430642 (228 views); M430644 (213 views); M430647 (219 views); M430648 (213 views); M430649 (207 views); M430652 (228 views); M430655 (221 views); M430657 (232 views); M430658 (242 views); M430659 (229 views); M430660 (242 views); M430661 (234 views); M430664 (229 views); M430665 (232 views); M430667 (199 views);
    Folio views1698Folio list (353 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (286 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (282 views); Crataegus douglasii Lindley (allopolyploid) (265 views); Crataegus chrysocarpa Ashe (tetraploid) (251 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (261 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);