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: 18720

    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

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    Project views

    type number of views Individual items viewed (where applicable)
    Total project views18720
    Project overview619
    Documents list399
    Taxon list483
    Views for media list408
    Specimen list3087
    Media views11286Media search (1179 views); M430639 (196 views); M430618 (200 views); M430654 (191 views); M430666 (188 views); M430617 (196 views); M430645 (197 views); M430646 (189 views); M430651 (188 views); M430653 (182 views); M430663 (204 views); M430630 (213 views); M430656 (207 views); M430627 (197 views); M430631 (212 views); M430643 (187 views); M430662 (207 views); M430650 (198 views); M430619 (198 views); M430620 (206 views); M430621 (199 views); M430622 (210 views); M430623 (194 views); M430624 (203 views); M430625 (199 views); M430626 (202 views); M430628 (211 views); M430629 (220 views); M430632 (215 views); M430633 (213 views); M430634 (191 views); M430635 (199 views); M430636 (187 views); M430637 (192 views); M430638 (196 views); M430640 (192 views); M430641 (192 views); M430642 (195 views); M430644 (187 views); M430647 (190 views); M430648 (184 views); M430649 (181 views); M430652 (197 views); M430655 (193 views); M430657 (206 views); M430658 (213 views); M430659 (199 views); M430660 (210 views); M430661 (208 views); M430664 (198 views); M430665 (205 views); M430667 (170 views);
    Folio views1452Folio list (315 views); Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (242 views); Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (239 views); Crataegus douglasii Lindley (allopolyploid) (224 views); Crataegus chrysocarpa Ashe (tetraploid) (212 views); Crataegus macracantha Lodd. ex Loud. (tetraploid) (220 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);