Results and Discussion Ericameria cuneaba in the northern Sierra Nevada occurs at ca
2150 m in association with Pinus ponderosa, P. jeffreyi, Libocedrus decurrans, Quer cus …

Acamptopappus comprises A. sphaerocephalus var. sphaerocephalus and var. hirtellus,
and A. shockleyi, taxa of the southwestern deserts of the United States. Characteristics …

The purpose of this paper is to treat the Chihuahuan Desert species of Ericameria in
advance of the flora being prepared for that region by MC Johnston et al. In this report one …

Three new taxa are described from the Arizona Strip in northwestern Arizona: Camissonia
dominguez-escalantorum ND Atwood, LC Higgins & SL Welsh, sp. nov.; Physaria arizonica …

Gutierrezia comprises sixteen North American species; two have two varieties each.
Thurovia and Greenella are congeners of Gutierrezia, five taxa formerly of Xanthocephalum …

Erigeron conditii DJ Keil, sp. nov.(Asteraceae), is described from the San Carpoforo Creek
Canyon of southwestern Monterey and northwestern San Luis Obispo counties, California. It …

Townsendia gypsophila, a new species from Sandoval Co., New Mexico, is described and
illustrated. It is a narrowly distributed obligate gypsophile closely related to T. fendleri and T …

A new species of Machaeranthera is described from Ash Meadows, Nye County, Nevada. It
is most closely related to M. leucanthemifolia (Greene) Greene, but differs in being a strict …

Chrysothamnus eremobius, endemic to mountains of southern Nevada, is formally
described and illustrated. Morphological and anatomical comparisons are made to related …

The eight taxa of Xanthocephalum, including X. durangense, X. gymnospermoides var.
intermedium, and X. gymnospermoides var. eradiatum, are characterized by glabrous …