dcsimg

Bunches of Bluebunch: the way we were

Imagem de Elymus spicatus (Pursh) Gould

Descrição:

This is what our foothills should look like but now rarely do. Bluebunch wheatgrass (its scientific name is Pseudoroegneria spicata with synonyms that include Agropyron spicatum and Elymus spicatus and others) is a cool season, drought resistant, perennial native bunchgrass that should be in widespread use in landscapes (but rarely is).Due to late summer moisture this year, each of these "bunches" has vigorous new growth at the base of their golden-dried flowering stalks (culms) of neatly tufted, and beautiful green leaves. Its appearance at this time of year is in general in stark contrast to the same scene four months ago.Most of the native bunchgrasses like Bluebunch wheatgrass in starting their growth later in the spring hold moisture longer and are in that sense more "fire resistant" and highly beneficial compared to their exotic counterparts which grow faster and dry out much more quickly and therefore burn more readily and much hotter. Local genotypes of this species, and not Crested wheatgrass, should be used in appropriate locations for restoration purposes.So, the Bluebunch wheatgrass dominance here is a very good and welcome sign and may also indicate that this location was not extensively grazed (and that might make sense since it would be difficult to access, at least by cattle, due to the steepness of slopes leading into the area that surround it) since Bluebunch wheatgrass does not respond well to heavy grazing.And what may look like a monoculture is in fact not; the native grasses encourage diversity and a relative wealth of other native species co-occur here despite the harsh gravel substrate. This is in contrast to introduced, exotic grasses such as Crested wheatgrass which tend to exclude other species and yet the USDA and USFS continues to use and recommend it in disturbance-restoration projects (and has done so for decades).Plants can have awns or be awnless; some taxonomists treat those forms as different entities but genetic research has shown that is controlled by a single gene and they should likely not be treated as separate taxonomic entities.Oct. 18, 2014, lower Emigration Canyon, Salt Lake County, Utah, elev. approx. 5,725 ft.

Informação de origem

licença
cc-by-nc-sa
direitos autorais
Tony Frates
fotógrafo
Tony Frates
original
arquivo de mídia original
visite a fonte
site do parceiro
Flickr Group
ID
79eecf498626907853387b1ddb0a8280