Acamptopappus sphaerocephalus

(Harvey & A. Gray) A. Gray

Proc. Amer. Acad. Arts 8: 634. 1873.

Common names: Rayless goldenhead
IllustratedEndemic
Basionym: Haplopappus sphaerocephalus Harvey & A. Gray Mem. Amer. Acad. Arts, n. s. 4: 76. 1849 (as Aplopappus)
Treatment appears in FNA Volume 20. Treatment on page 185.
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Leaf faces glabrous or hirtellous. Heads in loose, corymbiform arrays. Involucres hemispheric to globose, 7–10 mm wide. Rays 0.

Discussion

Varieties 2 (2 in the flora).

The two varieties were mapped as geographically intermingling in southern California (M. A. Lane 1988). Considerable variation in expression of vestiture occurs in the area where the hirtellous-leaved plants grow and identifications should be recognized as arbitrary.

Selected References

None.

Key

1 Leaf margins and faces hirtellous Acamptopappus sphaerocephalus var. hirtellus
1 Leaf margins and faces glabrous, or margins sometimes hirtellous Acamptopappus sphaerocephalus var. sphaerocephalus

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

not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
(Harvey & A. Gray) A. Gray +
decurrent +
Haplopappus sphaerocephalus +
spatulate;obovate;lanceolate +
rugulose +  and muricate +
barbellulate +  and barbellate +
Rayless goldenhead +
not 2-lipped +  and actinomorphic +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +  and obconic +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Nev. +  and Utah +
densely sericeous +  and villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
in loose corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
hemispheric;globose +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
sessile +  and petiolate +
hirtellous +  and glabrous +
lanceolate +
lacerate +
2-carpellate +
barbellulate +  and smooth +
persistent +
apically attenuate +  and spatulate +
subequal +
broadly ovate +  and elliptic-ovate +
Proc. Amer. Acad. Arts +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
setiform +
exalbuminous +
Illustrated +  and Endemic +
spinescent +  and branched +
hirtellous +  and glabrous +
triangular-lanceolate +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Acamptopappus sphaerocephalus +
Acamptopappus +
species +
perennial +, biennial +  and annual +