Erythea 2: 111. 1894
sw United States, nw Mexico.
isocoma acradenia is distinctive in its whitish stems and narrow, whitish-indurate phyllaries with an apical resin pocket (or pockets). the leaves often occur in axillary fascicles
Varieties 3 (3 in the flora).
|1||Leaves 50–150 mm; florets 20–27; phyllaryapices spinulose-aristate||Isocoma acradenia var. bracteosa|
|1||Leaves 20–50 mm; florets 12–24; phyllary apices usually rounded, not spinulose, sometimes with weakly developed aristae||> 2|
|2||Leaves usually entire, proximal rarely toothed or lobed||Isocoma acradenia var. acradenia|
|2||Leaves all toothed to pinnatifid||Isocoma acradenia var. eremophila|