Aphanostephus ramosissimus

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 310. 1836.

Common names: Plains lazydaisy
Illustrated
Treatment appears in FNA Volume 20. Treatment on page 353. Mentioned on page 352.

Annuals, 10–45 cm; vestiture hispidulo-puberulent, stem hairs spreading to deflexed, 0.2–0.6 mm. Phyllary apices acute. Ray-florets 20–41. Disc-florets: corolla bases not conspicuously swollen and indurate. Cypselae: hairs apically straight; pappi minutely ciliate crowns 0.1–0.2 mm or absent or nearly so. 2n = 8.

Distribution

V20-814-distribution-map.gif

Ariz., N.Mex., Okla., Tex., Mexico

Discussion

Varieties 3 (2 in the flora).

Selected References

None.

Key

1 Involucres 4.7–7.5 mm; cypselae (1.1–)1.4–1.6 mm; pappi 0 or minutely ciliate rings 0.1–0.2 mm, sometimes nearly smooth at apices Aphanostephus ramosissimus var. humilis
1 Involucres 3.2–4.8 mm; cypselae (1–)1.2–1.4 mm; pappi coroniform, indurate, cupuliform, 0.2–0.6 mm, usually minutely ciliate-tipped Aphanostephus ramosissimus var. ramosissimus
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
decurrent +
broadly oblanceolate;linear-lanceolate +
rugulose +  and muricate +
barbellulate +  and barbellate +
Plains lazydaisy +
not 2-lipped +  and actinomorphic +
yellow +  and white +
subterete +, 4-angled +  and angular-columnar +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Okla. +, Tex. +  and Mexico +
glabrous +, strigose +, hirsute +  and hispid +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
straight +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
depressed-hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
deltate +
dentate to pinnatifid +  and entire +
pinnatifid +  and entire +
2-carpellate +
persistent +
acute +  and coroniform +
ovatelanceolate +
unequal +  and subequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
setiform +
exalbuminous +
Illustrated +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
deflexed +, erect +  and decumbent or ascending +
appendaged +  and truncate +
papillate +  and smooth +
Keerlia de +
Aphanostephus ramosissimus +
Aphanostephus +
species +
tubular +
hispidulo-puberulent +
10 cm100 mm <br />0.1 m <br /> (45 cm450 mm <br />0.45 m <br />) +
tree +, shrub +  and subshrub +