Acamptopappus sphaerocephalus

(Harvey & A. Gray) A. Gray

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

Common names: Rayless goldenhead
IllustratedEndemic
Basionyms: 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.

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 +
triangular-lanceolate +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Acamptopappus sphaerocephalus +
Acamptopappus +
species +
perennial +, biennial +  and annual +