Compilation
Machaeranthera pulverulenta

12 Images see all

Previous
Next

Name

Identification
Machaeranthera pulverulenta Greene [family ASTERACEAE ] (stored under name); Verified by A. Nelson, 1913
Related name
  • Machaeranthera canescens
  • Machaeranthera pulverulenta

Flora

Entry for Dieteria canescens (Pursh) Nuttall var. canescens [family ]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Dieteria canescens (Pursh) Nuttall var. canescens [family ]
Machaeranthera divaricata (Nuttall) Greene [family COMPOSITAE]
Machaeranthera laetevirens Greene [family COMPOSITAE]
Machaeranthera latifolia A. Nelson [family COMPOSITAE]
Machaeranthera pulverulenta (Nuttall) Greene [family COMPOSITAE]
Machaeranthera viscosa (Nuttall) Greene [family COMPOSITAE]
Treatment Author(s)
David R. Morgan
Information
Annuals, biennials, or short-lived perennials. Stems 1+, ascending, canescent, sometimes sparsely stipitate-glandular; branches loosely spreading to ascending, flexible and curved. Mid leaf blades linear to oblanceolate. Peduncles equaling or longer than involucres. Involucres narrowly to broadly turbinate, 6–10 mm. Phyllaries in 5–10 series, spreading to reflexed, apices usually stipitate-glandular, often also canescent. Ray florets pistillate, fertile. Cypselae sparsely appressed-hairy. 2n = 8.
Phenology
jul-aug (summer), sep-nov (fall)
Altitude range
1000–3000 m;
Distribution
USA Ariz.USA Calif.USA Colo.USA IdahoUSA Mont.USA Nebr.USA Nev.USA N.Dak.USA Oreg.USA S.Dak.USA UtahUSA Wyo.Canada Alta.Canada B.C.Canada Sask.
Discussion
Variety canescens is the most widespread variety of this species and is encountered in the western Great Plains, Rocky Mountains, eastern Sierra Nevada, and intermountain regions. Its range adjoins that of all the other varieties, and intergradation is common in areas of contact. Taxa that var. canescens intergrades with include var. ambigua in Utah, var. aristata in Colorado and Utah, var. glabra in Colorado, var. incana in Idaho and Washington, var. leucanthemifolia in California and Utah, var. nebraskana in Nebraska and South Dakota, var. sessiliflora in Idaho, var. shastensis in California, Nevada, and Oregon, and var. ziegleri in California. Variety canescens intergrades also with Dieteria bigelovii in Colorado, Utah, and Wyoming.

Related Materials