(plants) USDA NRCS (1999)
- You have accessRestricted accessThe Endangered Tennessee Purple Coneflower Echinacea tennesseensis (Asteraceae): Its Ecology and ConservationJeffrey L Walck, Thomas E Hemmerly and Siti N HidayatiNative Plants Journal, March 2002, 3 (1) 54-64; DOI: https://doi.org/10.3368/npj.3.1.54Jeffrey L WalckThomas E Hemmerly
- You have accessRestricted accessEthnobotany, Culture, Management, and Use of Common CamasMichelle Stevens, Dale C Darris and Scott M LambertNative Plants Journal, March 2001, 2 (1) 47-53; DOI: https://doi.org/10.3368/npj.2.1.47Michelle StevensDale C Darris
- You have accessRestricted accessPropagation Protocol for Ninebark (Physocarpus opulifolius)Gregory A HossNative Plants Journal, March 2001, 2 (1) 60-61; DOI: https://doi.org/10.3368/npj.2.1.60