Isocoma acradenia var. eremophila

(Greene) G. L. Nesom

Phytologia70: 82. 1991

Synonyms: Haplopappus acradenius eremophilus Isocoma acradenia eremophila
Basionyms: Isocoma eremophila
Found in FNA Volume 20. Treatment on page 441. Mentioned on page 440.
FNA20 P47 Isocoma acradenia.jpeg
Leaf blades mostly 2.5–5 cm, margins pinnately toothed to pinnatifid. Involucres 6–8 m. Phyllary apices usually rounded, sometimes with weakly developed aristae. Florets 12–20. 2n = 12.

Phenology: Flowering (May–)Aug–Nov.
Habitat: Sandy soils, alkaline or salt flats, desert dunes, often with Saguaro-Prosopis-Larrea, Larrea, Atriplex, Yucca, or mixed shrubs
Elevation: (-15–)0–900(–1100) m

Distribution

Ariz., Calif., Nev., Utah, Mexico (Baja California, Sonora).

Discussion

For the most part, var. eremophila is geographically separate from var. acradenia. In southwestern Nevada many intergrades occur; in San Bernadino County, California, the two taxa appear to be contiguous with little or no intergradation. In the latter area, the taxa apparently are at different ploidy levels.

References

None.

AuthorGuy L. Nesom +
BasionymIsocoma eremophila +
Elevation(-15–)0–900(–1100) m +
HabitatSandy soils, alkaline or salt flats, desert dunes, often with Saguaro-Prosopis-Larrea, Larrea, Atriplex, Yucca, or mixed shrubs +
IllustratorBarbara Alongi +
PhenologyFlowering (May–)Aug–Nov. +
ReferenceNone +
SynonymHaplopappus acradenius eremophilus + and Isocoma acradenia eremophila +
Taxon nameIsocoma acradenia var. eremophila +
Taxon parentIsocoma acradenia +
Taxon rankvariety +
VolumeVolume 20 +