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on low cliff face ledge at base of volcanic tuff cliffs above canyon bottom and thermal springs. Tentative ID as ssp. obscuriensis but flowers needed to confim. Note decumbent mature stems, slightly tuberculate (obscurely so), 7 ribs, 7-9 white radial spines, one erect central,
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on low cliff face ledge at base of volcanic tuff cliffs above canyon bottom and thermal springs. Tentative ID as ssp. obscuriensis but flowers needed to confim. Note decumbent mature stems, slightly tuberculate (obscurely so), 7 ribs, 7-9 white radial spines, one erect central,
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on low cliff face ledge at base of volcanic tuff cliffs above canyon bottom and thermal springs. Tentative ID as ssp. obscuriensis but flowers needed to confim. Note decumbent mature stems, slightly tuberculate (obscurely so), 7 ribs, 7-9 white radial spines, one erect central,