Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Cirsium fontinale var. fontinale
Photo is of parent taxon

fountain thistle
Basal leaves

longer spines 4–6 mm;

distal faces more densely glandular than tomentose.
Cauline leaves

longer spines 8–12 mm.
Phyllaries

100–120, 35–45 of them reflexed;

apical spines 1–2 mm;

marginal spines often present.
Cypselae

4.1–5 mm.
Distalmost

stem bracts usually tightly subtending heads.
2n

= 34, 34 + 1B.

Cirsium fontinale var. fontinale
Phenology Flowering spring–summer (Apr–Aug).
Habitat Serpentine seeps
Elevation ca. 120 m (ca. 400 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Of conservation concern.

Variety fontinale is known only from the vicinity of Crystal Springs Reservoir, San Mateo County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 162.
Parent taxa Asteraceae > tribe Cardueae > Cirsium > Cirsium fontinale
Sibling taxa
C. fontinale var. campylon, C. fontinale var. obispoense
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers