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59c. Cirsium fontinale (Greene) Jepson var. obispoense J. T. Howell, Leafl. W. Bot. 2: 71. 1938.
Chorro Creek bog thistle
Basal leaves: longer spines 5–9 mm; distal faces more densely glandular than tomentose. Cauline leaves: longer spines 4–7 mm. Distalmost stem bracts tightly subtending heads or separated from them. Phyllaries 70–120, 28–38 of them reflexed; apical spines 2–3 mm; marginal spines usually absent. Cypselae 3.8–4 mm. 2n = 34.
Flowering winter–summer (Jan–Sep). Serpentine seeps, coastal live oak woodlands, grasslands, riparian areas; of conservation concern; 40–300 m; Calif.
Variety obispoense is known only from the southern Santa Lucia and San Luis ranges of San Luis Obispo County.
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