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Johnson, L.A., Gowen, D. and Jensen, A.B. 2013. Cryptic speciation: distinguishing serpentine affiliated sister species Navarretia paradoxiclara and N. paradoxinota from N. intertexta (Polemoniaceae). Phytotaxa. 91, 2 (Apr. 2013), 27–38. DOI:https://doi.org/10.11646/phytotaxa.91.2.1.