Carthamus creticus

Linnaeus

Sp. Pl. ed. 2, 2: 1163. 1763.

Common names: Smooth distaff thistle
WeedyIntroduced
Synonyms: Carthamus baeticus Boissier & Reuter Carthamus lanatus subsp. baeticus (Boissier & Reuter) Nyman Carthamus lanatus subsp. creticus (Linnaeus) Holmboe
Treatment appears in FNA Volume 19. Treatment on page 180. Mentioned on page 179.

Plants 40–100 cm, herbage ± sparsely hairy. Stems rigidly erect, openly branched above, stramineous. Leaves basal and cauline; basal often absent at anthesis, petioles winged, blades pinnately 1–2-divided into linear or lanceolate spine-tipped lobes, cauline spreading or recurved, lanceolate to ovate, rigid, clasping, margins spiny-lobed, spine-tipped. Involucres ovoid, 20–25 mm, very thinly cobwebby or becoming glabrous. Outer phyllaries ascending or ± spreading, 35–55 mm, usually 2 times as long as inner, terminal appendages spreading to ascending, spiny-lobed, prominently spine-tipped. Corollas pale-yellow, 25–35 mm, throats abruptly expanded; anthers white with purple stripes; pollen white. Cypselae brown, 4–6 mm, outer roughened; pappus-scales 1–10 mm. 2n = 64.


Phenology: Flowering summer (Jun–Aug).
Habitat: Fields, roadsides
Elevation: 0–500 m

Distribution

V19-203-distribution-map.gif

Introduced; B.C., Calif., Nev., Oreg., S.C., Europe

Discussion

Carthamus creticus has been reported for British Columbia in all recent floras, as C. lanatus subsp. baeticus. It is native to the Mediterranean region.

Apparently an allohexaploid derived by hybridization between Carthamus leucocaulos (2n = 20) and C. lanatus (2n = 44) (M. O. Khidir and P. F. Knowles 1970b), C. creticus is similar to C. lanatus and was treated as a subspecies of the latter (P. Hanelt 1963, 1976).

Most American botanists have recognized this taxon at species rank, using the name Carthamus baeticus ascribed to (Boissier & Reuter) Nyman, based on the assumption that Nyman (Consp. Fl. Eur., 419. 1879) had proposed a new combination at the species level based on Kentrophyllum baeticum Boissier & Reuter. P. Hanelt (1963) used the name C. lanatus subsp. creticus for this taxon and treated both C. creticus and C. baeticus as synonyms. However, Hanelt (1976) substituted C. lanatus subsp. baeticus as the name for the taxon, ascribing the combination to the same Nyman publication. Hanelt (pers. comm.) has indicated that the contradictory nomenclatural citations were a result of Nyman’s peculiar way of presenting taxa that he considered to be subspecies: “in the work of Nyman the small-printed taxa subsumed under a ‘true’ species name and characterized by an asterisk had to be accepted as subspecies.” As a subspecific epithet, baeticus (1879) has nomenclatural priority over creticus (1914), hence Hanelt’s 1976 use of the former.

Like Carthamus lanatus, C. creticus is a noxious weed that can severely degrade infested rangelands.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Carthamus creticus"
short-tailed +
scarious +
oblong +, lobed +  and spiny-dentate +
indeterminate +  and determinate +
David J. Keil +
Linnaeus +
decurrent +
Asteraceae tribe Cynareae +
dentate +  and pinnately lobed +
1-2-divided +
10-nerved or 20-nerved +  and rugose +
Smooth distaff thistle +
actinomorphic +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
4-angled +, oblong +  and obpyramidal +
fertile +  and bisexual +
B.C. +, Calif. +, Nev. +, Oreg. +, S.C. +  and Europe +
0–500 m +
glabrous +, tomentose +  and more or less +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Fields, roadsides +
in few-headed cymiform arrays +  and singly +
indeterminate +
each +  and sessile +
glabrous +  and cobwebby +
constricted +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cauline +  and basal +
1-2-divided +
lanceolate +  and linear +
spiny-lobed +
2 times as long as inner phyllaries +
spreading +  and ascending +
3.5 cm35 mm <br />0.035 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
2-carpellate +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
persistent +
recurved +  and spreading +
1-2-divided +
Flowering summer (Jun–Aug). +
papillate +  and smooth +
distinct +  and fused +
papillate +
Sp. Pl. ed. +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
dentate +  and smooth +
overlapping +
subulate +
unequal +
exalbuminous +
several;4;5 +
Weedy +  and Introduced +
stramineous +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
Carthamus baeticus +, Carthamus lanatus subsp. baeticus +  and Carthamus lanatus subsp. creticus +
Carthamus creticus +
Carthamus +
species +
short-campanulate +  and cylindric +
expanded +
slender +
perennial +  and annual +
30 cm300 mm <br />0.3 m <br /> (180 cm1,800 mm <br />1.8 m <br />) +