For example, Arctostaphylos 'Emerald Carpet', whose ancestors include Arctostaphylos uva-ursi and Arctostaphylos nummularia.
 

From the Theodore Payne Foundation's Native Plant Garden Tour (April 28 & 29, 2007):
• Plant List for the Hessing/Bonfigli Garden in Altadena, with links to CNPLX inserted.

  Imagine that you go on the TPF tour, visit this garden, and want to find out where to get some of the same plants for your own garden.

• Calanda Avenue Native Plant Garden (courtesy of Krista Maxwell)
• The Flora of Edgewood Park (San Mateo County) compiled by Toni Corelli for the Santa Clara Valley Chapter of CNPS, with links to Calflora inserted.
  

To see exactly which plant names are found in a document and why, try the Nomenclature Analyzer.
 

For instance, on the information page for madrone, Arbutus menziesii, click on the link

What plants grow with Arbutus menziesii ?

Look for the header
• Inventory page scan date:
  and the date that the page was last scanned next to a particular nursery:
• 11/15/2007

By having both synonyms and cultivars, CNPLX is able to find many more species names (when scanning nusery webpages) than it could when using only Jepson Manual names.
 

On a species detail page, you will see any past synonyms or new names articulated in the upper right. Roll the mouse over a name to see where it came from (XWALK, ICPN, PLANTS, or CNPS). Click on Synonyms to see the status of the name from Calflora.
 

How it works. To add a listing to CNPLX, you need a contributor account. First, start a session. On the next page, press the link to make a new contributor account, and enter a valid email address.

To contribute a listing for your nursery,
1) start a session,
2) on the next page, press the link to log into your existing contributor account, and
3) press the ADD A SITE link.

To edit the listing for your nursery,
1) start a session,
2) on the next page, press the link to log into your existing contributor account,
3) go to the PROFILE page for your nursery, and
4) press the EDIT link in the upper right.

Local location checklists are also included on the county profile page, when available. Location checklists are no longer cross-referenced on species detail pages.

Before, the policy was to only include nurseries that were willing to provide a species list in some form. Now, county profile pages include nurseries which are reputed to grow or sell some natives, even if we have not been able to obtain a species list.
 

Here are our 2004 seed lists. Thank you for listing our seeds... we have received some business in this way.

1938 species are available (as seed or plants) from at least one nursery.

889 species are available from only one nursery.

452 species are available from at least five nurseries.
 

You can make a similar location checklist page like this:

define a checklist;

run REPORT;

save the resulting page as an HTML file; and

email the file to your associates or put it on your website.

CNPLX checklists are also useful for shopping. I am now in the process of compiling a list of species to be planted in the fall. When I run REPORT on the checklist, it tells me exactly which nurseries carry each species. Armed with the report, I can pick out the most relevant nurseries and plan a shopping trip.
 

Added Appleton Forest Nursery in Sebastopol. This nursery grows trees from locally collected seed, including 7 species of oak. Other interesting plants available here include Angelica tormentosa and Oemleria cerasiformis (oso berry).

Neither of these nurseries has their own website.
 

A suggestion: since you are already able to categorize the results by things like soil, perhaps the categories could be added to the query engine; for example, I'd like to query for all Dudleya species that grow well in clay. Also, it would be nice to give some visual highlight to species that are available from some nursery versus those that are not.

...it would be helpful if the search function accepted commonly used alternate names for species. "Mahonia" for "Berberis" for example. I think the powers-that-be (or at least some of them) want us to use "Berberis" instead of "Mahonia", but a Google search turns up twice as many entries for Mahonia aquifolium as for Berberis aquifolium.