Penstemon angustifolius (English Wikipedia)

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

refsWebsite

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1americansouthwest.net

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1floranorthamerica.org

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1swcoloradowildflowers.com

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1web.archive.org

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americansouthwest.net

"Western USA wildflowers: narrowleaf beardtongue, Penstemon Angustifolius". www.americansouthwest.net. Retrieved 2023-12-06.

floranorthamerica.org

dev.floranorthamerica.org

Freeman, Craig C. (29 July 2020) [2019]. "Penstemon angustifolius". Flora of North America. p. 113. ISBN 978-0190868512. OCLC 1101573420. Retrieved 24 October 2024.

jstor.org

Welsh, Stanley L.; Atwood, N. Duane; Goodrich, Sherel; Higgins, Larry C. (1987). A Utah Flora. Great Basin Naturalist Memoirs, No. 9 (First ed.). Provo, Utah: Brigham Young University. p. 584. JSTOR 23377658. OCLC 9986953694.

kew.org

powo.science.kew.org

"Penstemon angustifolius Nutt. ex Pursh". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 24 October 2024.
"Penstemon angustifolius var. angustifolius". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 11 December 2024.
"Penstemon angustifolius var. caudatus (A.Heller) Rydb". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 11 December 2024.
"Penstemon angustifolius var. venosus (D.D.Keck) N.H.Holmgren". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 11 December 2024.

swcoloradowildflowers.com

"Southwest Colorado Wildflowers, Penstemon angustifolius". www.swcoloradowildflowers.com. Retrieved 2023-11-20.

usda.gov

plants.sc.egov.usda.gov

NRCS (2 February 2024), "Penstemon angustifolius", PLANTS Database, United States Department of Agriculture (USDA)

plants.usda.gov

"Penstemon angustifolius" (PDF). USDA NRCS Plant Fact Sheet. United States Department of Agriculture. Archived from the original (PDF) on 1 August 2017. Retrieved 2 February 2024.

web.archive.org

"Penstemon angustifolius" (PDF). USDA NRCS Plant Fact Sheet. United States Department of Agriculture. Archived from the original (PDF) on 1 August 2017. Retrieved 2 February 2024.

worldcat.org

search.worldcat.org

Freeman, Craig C. (29 July 2020) [2019]. "Penstemon angustifolius". Flora of North America. p. 113. ISBN 978-0190868512. OCLC 1101573420. Retrieved 24 October 2024.
Welsh, Stanley L.; Atwood, N. Duane; Goodrich, Sherel; Higgins, Larry C. (1987). A Utah Flora. Great Basin Naturalist Memoirs, No. 9 (First ed.). Provo, Utah: Brigham Young University. p. 584. JSTOR 23377658. OCLC 9986953694.