As Broom snakeweed Gutierrezia
sarothrae As Britt& Rusby Threadleaf snakeweed Gutierrezia
microcephala As (DC.
Within each plot, the presence/absence (frequency) of Coleogyne, Yucca, Encelia, and Gutierrezia
plants was recorded.
Association with mature plants protects seedlings from predation in an arid grassland shrub, Gutierrezia
sarothrae density was highest in both treatments at both soil surface and 3 cm depths (0.
The three most common dominant herbaceous species were Artemisia tridentata (big sagebrush), Gutierrezia
sarothrae (snakeweed), and Bromus tectorum (downy chess grass); and the three most common dominant overstory and understory species were Juniperus monosperma (one-seed juniper), d.
sphaerocephala Gray, Roundleaf, snakeleaf (HS, R).
For characterizations of habitat, we recorded whether the lizard was in the open or under one of four types of plants: Prosopis, Ephedra, Gutierrezia
, or other plant.
Habitat was characterized by scattered shrubs including Chrysothamnus nauseosus (rabbitbrush), Sarcobatus vermiculatus (greasewood), and Gutierrezia
sarothrae (snakeweed), and an assortment of weeds on the roadside and severely deteriorated grassland of the Ninemile Valley adjacent to road 804 (Walker et al.
According to structural matrices of discriminant-function analyses, bare ground was the most important determinant of differences in 2001 and 2002, and Gutierrezia
was the most important determinant in 2003.