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Keyword: Asteraceae

Floral guilds of bees in sagebrush steppe: Comparing bee usage of wildflowers available for postfire restoration

Publications Posted on: October 02, 2019
Healthy plant communities of the American sagebrush steppe consist of mostly wind-pollinated shrubs and grasses interspersed with a diverse mix of mostly spring-blooming, herbaceous perennial wildflowers. Native, nonsocial bees are their common floral visitors, but their floral associations and abundances are poorly known. Extrapolating from the few available pollination studies, bees are the primary pollinators needed for seed production.

Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States

Publications Posted on: September 14, 2019
Physiological responses to temperature extremes are considered strong drivers of species’ demographic responses to climate variability. Plants are typically classified as either avoiders or tolerators in their freezing‐resistance mechanism, but a gradient of physiological‐threshold freezing responses may exist among individuals of a species.

Biochar effects on the nursery propagation of 4 northern Rocky Mountain native plant species

Publications Posted on: May 10, 2018
Biochar has emerged as a promising potential amendment of soilless nursery media for plant propagation.

Vascular plant species of the Comanche National Grassland in southeastern Colorado

Publications Posted on: May 12, 2016
This checklist has 785 species and 801 taxa (for taxa, the varieties and subspecies are included in the count) in 90 plant families. The most common plant families are the grasses (Poaceae) and the sunflower family (Asteraceae). Of this total, 513 taxa are definitely known to occur on the Comanche National Grassland.

Insights into big sagebrush seedling storage practices

Publications Posted on: September 02, 2015
Big sagebrush (Artemisia tridentata Nutt. [Asteraceae]) is an essential component of shrub-steppe ecosystems in the Great Basin of the US, where degradation due to altered fire regimes, invasive species, and land use changes have led to increased interest in the production of high-quality big sagebrush seedlings for conservation and restoration projects.

Baselines to detect population stability of the threatened alpine plant Packera franciscana (Asteraceae)

Publications Posted on: August 21, 2015
Population size and density estimates have traditionally been acceptable ways to track species’ response to changing environments; however, species' population centroid elevation has recently been an equally important metric. Packera franciscana (Greene) W.A. Weber and A.

Seed production and field establishment of hoary tansyaster (Machaeranthera canescens)

Publications Posted on: July 27, 2015
The USDA NRCS Aberdeen Plant Materials Center (PMC) produces certified early generation seed of hoary tansyaster (Machaeranthera canescens (Pursh) A. Gray [Asteraceae]), a late summer and fall blooming forb native to the Intermountain West region. Hoary tansyaster is an excellent forb candidate for restoration efforts in arid to semiarid sites.

Notice of release of Amethyst Germplasm hoaty tansyaster: Selected class of natural germplasm

Publications Posted on: July 27, 2015
The US Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS), Aberdeen Plant Materials Center, Aberdeen, Idaho, announces the release of Amethyst Germplasm hoary tansyaster (Machaeronthero canescens (Pursh) A. Gray [Asteraceae]}, a selected class natural track germplasm identified by NRCS accession number 9076670 for conservation plantings in the Intermountain US.

Studies of a new hybrid taxon in the Artemisia tridentata (Asteraceae: Anthemideae) complex

Publications Posted on: June 26, 2013
Members of the Artemisia tridentata complex (ASTERACEAE: Anthemideae: Artemisia subgen. Tridentatae) have adapted to changing environmental conditions through geographic migration, introgression, and hybridization. These processes have resulted in morphologic and genetic variation. A presumed hybrid ("Bonneville" big sagebrush) of the complex occurs in the moister ranges of A. t. ssp.

Banking Wyoming big sagebrush seeds

Publications Posted on: June 21, 2013
Five commercially produced seed lots of Wyoming big sagebrush (Artemisia tridentata Nutt. var. wyomingensis (Beetle & Young) S.L. Welsh [Asteraceae]) were stored under various conditions for 5 y. Purity, moisture content as measured by equilibrium relative humidity, and storage temperature were all important factors to successful seed storage.