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FNA | Family List | FNA Vol. 20 | Asteraceae | Acamptopappus

2. Acamptopappus sphaerocephalus (Harvey & A. Gray) A. Gray, Proc. Amer. Acad. Arts. 8: 634. 1873.

Rayless goldenhead

Haplopappus sphaerocephalus Harvey & A. Gray, Mem. Amer. Acad. Arts, n. s. 4: 76. 1849 (as Aplopappus)

Leaf faces glabrous or hirtellous. Heads in loose, corymbiform arrays. Involucres hemispheric to globose, 7–10 mm wide. Rays 0.

Varieties 2 (2 in the flora): sw United States.

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.

1 Leaf margins and faces hirtellous   2a Acamptopappus sphaerocephalus var. hirtellus
+ Leaf margins and faces glabrous, or margins some-times hirtellous   2b Acamptopappus sphaerocephalus var. sphaerocephalus


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