| npss.sk.ca | Native Plant Society of Saskatchewan |
| anpc.ab.ca | Alberta Native Plant Council |
| michbotclub.org | Michigan Botanical Club |
| tripod.com | Native Plant Project of the Lower Rio Grande Valley, Texas |
| mdflora.org | Maryland Native Plant Society |
| ubcbotanicalgarden.org | University of British Columbia Botanical Garden and Centre for Plant Research |
| geocities.com | Friends of Glencoe Cove |
| conservenativeplants.ca | Conserve Native Plants Society |
| pawildflower.org | Pennsylvania Native Plant Society |
| npsot.org | Native Plant Society of Texas |
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