annual

Showing 1–12 of 36 results

  • Alyssum desertorum / desert madwort

    • short crucifer with teeny leaves, no basal rosettes
    • short inflorescence with numerous teeny yellow flowers... short-lived
    • seed capsules mature by mid-July, ca. 40/stalk
    • disturbed sites of any kind
    • often in dense populations

  • Amaranthus retroflexus / pigweed

    • green bottle-brush inflorescence
    • accomplished weed on disturbed sites (including road & driveway cracks)
    • often in gardens, farm fields (edges), roadsides

  • Bassia scoparia / burningbush

    • large, annual herb (forb)
    • leaves long-ish and narrow
    • inflorescence a highly branched spike with teeny green/yellow flowers
    • may form huge, invasive colonies
    • whole plant turns red in fall
    • a tumbleweed
    • especially in disturbed areas and wastelands in the Valley

  • Beteroa incana / hoary alyssum

    • dense clusters of teeny white flowers
    • 4 petals, each with a notch
    • fruit is a short, fat-ish seed pod (silicle)
    • found in pastures and all manner of disturbed habitats
    • toxic to horses

  • Blitum nuttallianum / Nuttall’s povertyweed

    • ugly little creeping plant from a central stem
    • arrow-shaped leaves with two prominent lobes, especially on lower leaves
    • teeny clusters of teeny greenish flowers; no petals; in most leaf axils
    • widespread, but usually exposed and weed-like

  • Bromus tectorum / cheatgrass

    • short bunchgrass, 2 to 30 in at floweirng
    • panicle with all florets to one side; long awns
    • early season growth, flowering, seed drop
    • florets green, turning purple as seeds mature
    • highly invasive!

  • Capsella bursa-pastoris / shepherd’s purse

    • small crucifer with terminal clusters of teeny white flowers
    • rosette of small, maybe toothed, leaves
    • very distinctive, notched, triangular fruits - like shepherd's "purses"
    • found pretty much anywhere that has/had bare soil

  • Cardamine hirsute / hairy bittercress

    • small brassica/crucifer with compound leaves
    • teeny white, 4 petal flowers with 4 stamens in racemic clumps
    • a widespread weed, including gardens and lawns

  • Collinsia parviflora / maiden blue-eyed Mary

    • inconspicuous
    • teeny blue and white flowers, singly or in small clusters
    • reddish stems and buds more visible than the flowers
    • wide variety of habitats, bare rocks to marshy fens

  • Collomia linearis / tiny trumpet

    • teeny, tubular, lilac to white flowers
    • flowers in clusters at top of stem in a basket of leaves
    • velvety stem; long, narrow, lance-shaped leaves

  • Convulvulus arvensis / field bindweed

    • prostrate and twining vine with white "morning-glory" flowers
    • may be so dense as to choke out other plants
    • roadsides, agricultural fields, waste areas
    • "noxious" in Idaho

  • Corydalis aurea / scrambled eggs

    • prostrate herb, up to 15" tall
    • moist but well-drained soils, including on roadsides
    • yellow tubular flowers, with spurs
    • highly dissected leaves, blue-grey except when young
    • fruits are pod-like, resembling peas or beans

Showing 1–12 of 36 results