Echinocactus horizonthalonius (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Echinocactus horizonthalonius" in English language version.

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bioone.org

Thornton, Bill (May 2011). "The Nichol Turk's Head, a Conservation Success Story". Cactus and Succulent Journal. 83 (3): 107–108. doi:10.2985/0007-9367-83.3.107. ISSN 0007-9367. S2CID 83628263.

doi.org

McIntosh, Margrit E.; Boyd, Amy E.; Jenkins, Philip D.; McDade, Lucinda A. (2011). "Growth and Mortality in the Endangered Nichol's Turk's Head Cactus Echinocactus Horizonthalonius Var. Nicholii (Cactaceae) in Southeastern Arizona, 1995—2008". The Southwestern Naturalist. 56 (3): 333–340. doi:10.1894/F05-PHCC-01.1. ISSN 0038-4909. JSTOR 23028135. S2CID 84454130.
Thornton, Bill (May 2011). "The Nichol Turk's Head, a Conservation Success Story". Cactus and Succulent Journal. 83 (3): 107–108. doi:10.2985/0007-9367-83.3.107. ISSN 0007-9367. S2CID 83628263.

efloras.org

Echinocactus horizonthalonius Flora of North America.

fws.gov

fws.gov

Baker, M. (2007). A multivariate study of morphological characters for Echinocactus horizonthalonius and E. texensis (Cactaceae). USFWS.

ecos.fws.gov

USFWS. E. h. var. nicholii Five-year Review. July 2009.

jstor.org

McIntosh, Margrit E.; Boyd, Amy E.; Jenkins, Philip D.; McDade, Lucinda A. (2011). "Growth and Mortality in the Endangered Nichol's Turk's Head Cactus Echinocactus Horizonthalonius Var. Nicholii (Cactaceae) in Southeastern Arizona, 1995—2008". The Southwestern Naturalist. 56 (3): 333–340. doi:10.1894/F05-PHCC-01.1. ISSN 0038-4909. JSTOR 23028135. S2CID 84454130.

natureserve.org

explorer.natureserve.org

"NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 24 April 2023.

semanticscholar.org

api.semanticscholar.org

McIntosh, Margrit E.; Boyd, Amy E.; Jenkins, Philip D.; McDade, Lucinda A. (2011). "Growth and Mortality in the Endangered Nichol's Turk's Head Cactus Echinocactus Horizonthalonius Var. Nicholii (Cactaceae) in Southeastern Arizona, 1995—2008". The Southwestern Naturalist. 56 (3): 333–340. doi:10.1894/F05-PHCC-01.1. ISSN 0038-4909. JSTOR 23028135. S2CID 84454130.
Thornton, Bill (May 2011). "The Nichol Turk's Head, a Conservation Success Story". Cactus and Succulent Journal. 83 (3): 107–108. doi:10.2985/0007-9367-83.3.107. ISSN 0007-9367. S2CID 83628263.

usda.gov

plants.usda.gov

USDA: Echinocactus horizonthalonius var. nicholii

worldcat.org

McIntosh, Margrit E.; Boyd, Amy E.; Jenkins, Philip D.; McDade, Lucinda A. (2011). "Growth and Mortality in the Endangered Nichol's Turk's Head Cactus Echinocactus Horizonthalonius Var. Nicholii (Cactaceae) in Southeastern Arizona, 1995—2008". The Southwestern Naturalist. 56 (3): 333–340. doi:10.1894/F05-PHCC-01.1. ISSN 0038-4909. JSTOR 23028135. S2CID 84454130.
Thornton, Bill (May 2011). "The Nichol Turk's Head, a Conservation Success Story". Cactus and Succulent Journal. 83 (3): 107–108. doi:10.2985/0007-9367-83.3.107. ISSN 0007-9367. S2CID 83628263.