Rhagadiolus

Jussieu

Gen. Pl., 168. 1789.

Etymology: Greek rhagado, crack or split, and - olus, diminutive, perhaps alluding to gaps between margins of enfolding phyllaries
Treatment appears in FNA Volume 19. Treatment on page 300. Mentioned on page 214, 218.
 TaxonIllustrator 
FNA19 P29 Helminthotheca echioides.jpegHelminthotheca echioides
Rhagadiolus stellatus
Hedypnois cretica
Barbara Alongi
Marjorie C. Leggitt
Barbara Alongi

Annuals, 5–60+ cm; taprooted. Stems usually 1, erect, branched distally, glabrous. Leaves basal and cauline (mostly cauline at flowering); basal sessile or ± petiolate, distal ± sessile; blades ovatelanceolate to lanceolate or linear (often runcinate), margins entire or dentate to pinnately lobed (faces glabrous or ± hispid). Heads in ± corymbiform arrays (terminal heads often surpassed by others). Peduncles not inflated, rarely bracteolate. Calyculi of 5, ovate to deltate bractlets. Involucres campanulate to cylindric, 2–4+ mm diam. (larger in fruit). Phyllaries (3–) 5–8 in 1 series (closely enfolding ovaries/cypselae of subtended florets; ± patent in fruit), linear, equal, margins often scarious, apices acuminate (abaxially glabrous or ± hispid to scabrous). Receptacles ± flat, smooth or ± pitted, glabrous, epaleate. Florets 5–6 (–10+); corollas yellow. Cypselae brownish, heteromorphic; outer (tardily falling with enfolding phyllary) ± terete, narrowed distally, straight to arcuate, not beaked, ribs 0, faces glabrous; inner (readily falling) terete, straight to ± coiled, faces glabrous or closely hirtellous; pappi 0. x = 5.

Distribution

Introduced; Europe, Africa

Discussion

Species 1 or 2 (1 in the flora).

Selected References

None.

"fine" is not a number.

... more about "Rhagadiolus"
acuminate +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
Jussieu +
petiolate +  and sessile +
decurrent +
compound +  and simple +
ovatelanceolate;lanceolate or linear +
tuberculate +, rugose +, muricate +  and smooth +
filiform +
zygomorphic +, actinomorphic +  and (3-)5-merous +
heteromorphic +
tapered +, beaked +, flattened +, obcompressed +, compressed +, prismatic +, fusiform +, ellipsoid +, columnar +  and clavate +
Europe +  and Africa +
Greek rhagado, crack or split, and - olus, diminutive, perhaps alluding to gaps between margins of enfolding phyllaries +
hirtellous +  and glabrous +
winged +  and beaked +
dispersed +
indeterminate +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate;cylindric +
sessile +  and petiolate +
cauline +  and basal +
dentate to pinnately lobed +  and entire +
divided +, lobed +  and dentate +
2-carpellate +
not inflated +
connate +  and distinct +
subequal +  and unequal +
pitted +  and smooth +
flat;convex +
exalbuminous +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Rhagadiolus +
Asteraceae tribe Cichorieae +
coiled +  and taprooted +
straight +  and straight to arcuate +
terete +  and narrowed +
5 cm50 mm <br />0.05 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +