familyAsteraceae
genusAcamptopappus
Acamptopappus sphaerocephalus
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.
Leaf faces glabrous or hirtellous. Heads in loose, corymbiform arrays. Involucres hemispheric to globose, 7–10 mm wide. Rays 0.
Distribution
Ariz., Calif., Nev., Utah
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.
Lower Taxa
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.
... more about "Acamptopappus sphaerocephalus"
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
corymbiform +
continuous +
decurrent +
1-nerved +
spatulate;obovate;lanceolate +
ribbed +
stigmatic +
persistent +
absent +
Rayless goldenhead +
yellow +
absent +
monomorphic +
dimorphic +
staminate +
straight +
eglandular +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
indeterminate +
surrounding +
hemispheric;globose +
alternate +
cauline +
reflexed +
lanceolate +
hyaline +
lacerate +
not evident +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
subequal +
thick +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
appressed +
distinct +
falling +
unequal +
Proc. Amer. Acad. Arts +
1873 +
pistillate +
absent +
fertile +
absent +
epaleate +
pitted +
flat;slightly convex +
fibrous +
setiform +
exalbuminous +
modifed +
1;2 +
shorter +
alternate +
erect +
triangular-lanceolate +
2-branched +
glabrous +
Acamptopappus sphaerocephalus +
Acamptopappus +
species +
longer +