

Technical
More information about the Basalt Cactus and related topics,
including citations for further study.
RANGE OF BASALT CACTUS IN WASHINGTON
This map shows the locations of known and geolocated Basalt Cactus populations in Washington as of the early 2020s. The red dots do not show individual plants, but areas where several to many plants occur. The cactus occurs on mid-elevation anticlines, buttes, and hills such as the Frenchman Hills and Yakima Ridge, usually in areas of surface exposed basalt bedrock. The background colors correspond to regional ecological communities, the light blue being shrub-steppe. There are separate populations of Pediocactus nigripsinus in Idaho and Oregon.

SELECTED FURTHER READING
Books
BJORNSTAD, B. 2006. "On the Trail of the Ice Age Floods -- A Geological Field Guide to the Mid-Columbia Basin." Keokee Books.
ISBN 13: 978-1879628274
BJORNSTAD, B.N. 2021. "Ice Age Floodscapes of the Pacific Northwest -- A Photographic Exploration." Springer.
ISBN 13: 978-3030530426
O'CONNOR, G.P & WIEDA, K. 2003. "Northwest Arid Lands -- Discovering the Columbia Basin's Shrub-Steppe." Battelle Press.
ISBN 13: 978-1574771039
NISBET, J. 1999. "Singing Grass, Burning Sage -- Discovering Washington's Shrub-Steppe." Whitecap Books Ltd.
ISBN 13: 978-1558684782
Articles
BOCKELMAN, R.J. 2024. Update: Pediocactus nigrispinus for Washington State Cactus. Douglasia 48(3): 2-5. (Aut/Win 2024)
BOCKELMAN, R.J. 2024. Post-Fire Herbivory of Pediocactus nigrispinus in Central Washington. Cactus and Succulent Journal 96(2): 170-178. (31 May 2024)
BOCKELMAN, R.J. 2021. Phenology of Pediocactus nigrispinus in the Shrub Steppe of Central Washington. Douglasia 45(1): 13-17. (Spr 2021)
BOCKELMAN, R.J. 2021. Early Life History of Pediocactus nigrispinus in the Shrub-Steppe of Central Washington. Douglasia 45(3): 5-10. (Aut/Win 2021)
BOCKELMAN, R.J. 2020. Fascinating Fasciated Ball Cacti. Douglasia 44(3): 17. (Aut/Win 2020).
BOCKELMAN, R.J. 2020. Pediocactus nigrispinus -- Washington’s Only Ball Cactus. Douglasia 44(1): 2. (Spr 2020)
WOLMAN, D. 2010. Accidental Wilderness: Hanford, White Sands, and other 'wastelands' are good for bombs - and biodiversity. High Country News. (17 May 2010)
MCCLURE, D. 2016. Shrub Steppe: The Forgotten Ecosystem of Eastern Washington. Palouse Audubon Society.
BARCLAY, I. 2007. A Primer on Washington Native Cacti. The Desert Northwest. (Feb 2007 [Rev: Apr 2009])