Penstemon albomarginatus (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Penstemon albomarginatus" in English language version.

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1^st place

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berkeley.edu

Wetherwax, Margriet; Holmgren, Noel H. (2012). "Penstemon albomarginatus". Jepson eFlora. University of California, Berkley. Retrieved 19 October 2024.

MacKay, Pamela J. "white-margined beardtongue" (PDF). BLM California. Bureau of Land Management. pp. 1–4. Archived from the original (PDF) on 28 August 2018. Retrieved 28 August 2018.

Freeman, Craig C. (29 July 2020). "Penstemon albomarginatus". Flora of North America. Retrieved 18 October 2024.

NatureServe (2024). "Penstemon albomarginatus". Arlington, Virginia. Retrieved 18 October 2024.

MacKay, Pamela J. "white-margined beardtongue" (PDF). BLM California. Bureau of Land Management. pp. 1–4. Archived from the original (PDF) on 28 August 2018. Retrieved 28 August 2018.