Cirsium fontinale var. obispoense

J. T. Howell

Leafl. W. Bot. 2: 71. 1938.

Common names: Chorro Creek bog thistle
EndemicConservation concern
Treatment appears in FNA Volume 19. Treatment on page 162. Mentioned on page 161.

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.


Phenology: Flowering winter–summer (Jan–Sep).
Habitat: Serpentine seeps, coastal live oak woodlands, grasslands, riparian areas
Elevation: 40–300 m

Discussion

Of conservation concern.

Variety obispoense is known only from the southern Santa Lucia and San Luis ranges of San Luis Obispo County.

Selected References

None.

Lower Taxa

None.
David J. Keil +
J. T. Howell +
Cnicus fontinalis +
Chorro Creek bog thistle +
40–300 m +
Serpentine seeps, coastal live oak woodlands, grasslands, riparian areas +
Flowering winter–summer (Jan–Sep). +
Leafl. W. Bot. +
Endemic +  and Conservation concern +
Compositae +
Cirsium fontinale var. obispoense +
Cirsium fontinale +
variety +