Diploid (2N) and tetraploid (4N) Heuchera grossulariifolia growing together along the Salmon River in Idaho.

 

A view into the Salmon River drainage in northern Idaho.

 


 

The Rapid River in Idaho, where the interaction between Lithophragma parviflorum and Greya politella has been antagonistic in some years and commensalistic in other years.

 

 

Lithophragma cymbalaria growing in oak woodland habitat at the UC Sedgwick Reserve in the Transverse Range north of Santa Barbara.

 

 

 



Illustrations of Lithophragma floral morphology. Left: L. parviflorum from the Pacific Northwest. Center: L. parviflorum from Northern California. Right: L. cymbalaria from Southern California.

 



The geographic mosaic of coevolution. Interactions (represented by curved arrows) are subject to reciprocal selection only within some local communities (warm colored areas). These coevolutionary hotspots are embedded in a broader matrix of coevolutionary coldspots, where local selection is non-reciprocal (cool colors) or where only one of the participants occurs (light grey). Communities are linked by different degrees of gene flow (straight arrows).

The Thompson Laboratory at UC Santa Cruz

 
   
 
 

Click on the image to download a high-quality version

A female Greya politella moth preparing to oviposit into a Lithophragma parviflorum flower that has been cut in half. Pollen from a visit to a previous flower is visible as a yellow ring at the base of the moth's abdomen.

 

Downloadable Images