author keywords: endosperm; hybrid inviability; Mimulus guttatus (monkeyflower); pollen-pistil interactions; postzygotic isolation; seed development

MeSH headings : Crosses, Genetic; Endosperm / embryology; Fruit / growth & development; Germination; Hybridization, Genetic; Mimulus / embryology; Mimulus / genetics; Phenotype; Pollen Tube / growth & development; Self-Fertilization; Staining and Labeling; Sympatry

TL;DR: Light is shed on the extent of developmental variation between closely related species within the M. guttatus species complex, an important ecological model system, and a partial mechanism for the hybrid barrier between M. Guttatus and M. nudatus is provided. (via Semantic Scholar)