Cynara cardunculus subsp. flavescens
Bot. J. Linn. Soc. 109: 120, fig. 15A–D, F–J. 1992
Leaves armed with spines 1–3 cm. Middle phyllaries acute to short-acuminate at apex with point 10–21 mm and spine tip 2–5(–6) mm, distal margins with prominent yellowish margins 0.5–1+ mm.
Phenology: Flowering spring–summer (Apr–Jul).
Habitat: Disturbed areas in grasslands, coastal scrub, chaparral, riparian habitats, fallow fields, roadsides
Elevation: 0–500 m
Phenology: Flowering spring–summer (Apr–Jul).
Habitat: Disturbed areas in grasslands, coastal scrub, chaparral, riparian habitats, fallow fields, roadsides
Elevation: 0–500 m
Distribution

Calif., w Mediterranean region, Macaronesia.
Discussion
Artichoke thistle is a noxious weed that tends to spread aggressively in overgrazed range lands and may invade undisturbed natural vegetation as well. Dense infestations form pure stands, sometimes several hec-tares in extent. The long, needlelike spines deter herbivores and the large rosettes suppress the growth of other plants. Vigorous root sprouts can develop from fragments of the deep taproots left in the soil by cultivation or mechanical clearing.
References
None.
Lower Taxa
No lower taxa listed.
Facts about "Cynara cardunculus subsp. flavescens"
Author | David J. Keil + |
Authority | Wiklund + |
Basionyms | Asteraceae tribe Cynareae + |
Distribution | Calif. +, w Mediterranean region + and Macaronesia. + |
Elevation | 0–500 m + |
Habitat | Disturbed areas in grasslands, coastal scrub, chaparral, riparian habitats, fallow fields, roadsides + |
Illustrator | John Myers + |
Introduced | true + |
Phenology | Flowering spring–summer (Apr–Jul). + |
Publication title | Bot. J. Linn. Soc. + |
Publication year | 1992 + |
Reference | None + |
Source xml | https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V19-20-21/V19 42.xml + |
Synonyms | Compositae + |
Taxon family | Asteraceae + |
Taxon name | Cynara cardunculus subsp. flavescens + |
Taxon parent | Cynara cardunculus + |
Taxon rank | subspecies + |
Volume | Volume 19 + |