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SERNEC - Southeastern USA
Cirsium fontinale var. fontinale
(Greene) Jeps.
Family:
Asteraceae
Fountain thistle
Images
not available
FNA
Resources
David J. Keil in Flora of North America (vol. 19, 20 and 21)
Basal leaves:
longer spines 4-6 mm; distal faces more densely glandular than tomentose.
Cauline leaves:
longer spines 8-12 mm.
Distalmost stem bracts
usually tightly subtending heads.
Phyllaries
100-120, 35-45 of them reflexed; apical spines 1-2 mm; marginal spines often present.
Cypselae
4.1-5 mm.
2
n
= 34, 34 + 1B.
Flowering spring-summer (Apr-Aug). Serpentine seeps; of conservation concern; ca. 120 m; Calif.
Variety
fontinale
is known only from the vicinity of Crystal Springs Reservoir, San Mateo County.
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This project made possible by
National Science Foundation Award EF 1702516
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