Project 2423: 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.
Viewing Crataegus macracantha Lodd. ex Loud. (tetraploid) containing 10 media.

Crataegus subg. Americanae El Gazzar sect. Macracanthae Loudon ser. Macracanthae (Loudon) Rehder; Crataegus macracantha individuals shown to be tetraploid by flow cytometry (Talent & Dickinson 2005).

Folio Media

M425189
Crataegus macracantha Lodd. ex L...
whole leaf
M425190
Crataegus macracantha Lodd. ex L...
whole leaf
M425191
Crataegus macracantha Lodd. ex L...
whole leaf
M425192
Crataegus macracantha Lodd. ex L...
whole leaf
M425193
Crataegus macracantha Lodd. ex L...
whole leaf
M425194
Crataegus macracantha Lodd. ex L...
whole leaf
M425204
Crataegus macracantha Lodd. ex L...
whole leaf
M425205
Crataegus macracantha Lodd. ex L...
whole leaf
M425206
Crataegus macracantha Lodd. ex L...
whole leaf
M425356
Crataegus macracantha Lodd. ex L...
leaf close-up (skeleton)