Aphanostephus ramosissimus var. ramosissimus

Treatment appears in FNA Volume 20. Treatment on page 353.

Plants 20–45 cm. Involucres 3.2–4.8 mm. Ray-florets 20–41. Cypselae (1–) 1.2–1.4 mm; pappi coroniform, indurate, cupuliform, 0.2–0.6 mm, usually minutely ciliate. 2n = 8.


Phenology: Flowering (Feb–)Apr–Jul(–Sep).
Habitat: Sand and sandy loam, black loam, silt, caliche, rocky limestone soils, stream bottoms, oak-juniper openings, mesquite pastures, roadsides, fencerows, disturbed sites
Elevation: 900–2500(–4000) m

Distribution

V20-816-distribution-map.gif

N.Mex., Okla., Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

Selected References

None.

Lower Taxa

None.
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 +
not 2-lipped +  and actinomorphic +
yellow +  and white +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
subterete +, 4-angled +  and angular-columnar +
fertile +  and bisexual +
fertile +  and bisexual +
N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Nuevo León) +  and Mexico (Tamaulipas) +
900–2500(–4000) m +
glabrous +, strigose +, hirsute +  and hispid +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sand and sandy loam, black loam, silt, caliche, rocky limestone soils, stream bottoms, oak-juniper openings, mesquite pastures, roadsides, fencerows, disturbed sites +
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 +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
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 +
cupuliform +  and coroniform +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Flowering (Feb–)Apr–Jul(–Sep). +
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 var. ramosissimus +
Aphanostephus ramosissimus +
variety +
tubular +
hispidulo-puberulent +
10 cm100 mm <br />0.1 m <br /> (45 cm450 mm <br />0.45 m <br />) +