Xanthisma sect. Xanthisma

Treatment appears in FNA Volume 20. Treatment on page 384.

Annuals, rarely biennials, 20–70 cm; taprooted. Leaf-blades pinnatifid to 2-pinnatifid proximally, mid serrate, distal ± entire, teeth or lobes usually with apiculate callosities or cilia, not bristle-tipped. Heads radiate. Involucres turbinate to hemispheric or campanulate. Phyllaries in 3–4 series, appressed, bodies ovate to orbiculate or depressed elliptic, unequal, proximal portions (at least inner) stramineous, stalklike, stiff, distal 1/3–2/3 with a green patch, abruptly enlarged, 2–5 mm wide, apices acuminate to obtuse or broadly rounded, cuspidate or not, not bristle-tipped, faces glabrous. Receptacles: pit borders laciniate, teeth or setae mostly distinct, 0.2–2 mm. Ray corollas yellow. Cypselae dimorphic, narrowly obovoid to oblong, of ray 3-sided, of disc compressed laterally, generally 4-sided, 1.5–2.2 mm, walls thick, ribs 10–24, often obscure, faces sparsely tawny-silky; pappi of tawny, linear, basally flattened bristles 3–7 mm in 2 series. x = (4) 5.

Distribution

sc United States

Discussion

Species 1.

Selected References

None.

Lower Taxa

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Xanthisma sect. Xanthisma"
not tailed +, rounded +  and obtuse +
not bristle-tipped +
not +  and cuspidate +
distinct +
acuminate;obtuse or broadly rounded +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Ronald L. Hartman +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
decurrent +
indurate +
lanceolate;oblanceolate or spatulate +
rugulose +  and muricate +
ovate;orbiculate or depressed +
unequal +
barbellulate +  and barbellate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not 2-lipped +  and actinomorphic +
yellow +, purple +, pink +  and white +
compressed +, narrowly obovoid +  and oblong +
fertile +  and bisexual +
fertile +  and bisexual +
sc United States +
tawny-silky +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
in corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
turbinate;hemispheric or campanulate +
ovate +  and orbiculate or depressed-elliptic +
unequal +
pinnatifid;2-pinnatifid +
sessile +  and short-petiolate +
cauline +  and basal +
not bristle-tipped +
triangular +
serrate +  and entire +
2-pinnatifid +, pinnatifid +  and dentate +
2-carpellate +
usually whitish +  and brown or reddish-brown +
persistent +
30 +  and 90 +
flattened +
reflexed +, spreading +  and appressed +
linear +  and narrowly oblong or lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
10 +  and 24 +
exalbuminous +
distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sprawling +, spreading +  and erect +
hispid +  and hispidulous villous or stipitate-glandular +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Xanthisma sect. Xanthisma +
Xanthisma +
section +
not bristle-tipped +
distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
annual +  and biennial +
20 cm200 mm <br />0.2 m <br /> (70 cm700 mm <br />0.7 m <br />) +