weed

Showing 1–12 of 52 results

  • Achillea millefolium / yarrow

    • common - white umbrella-type flower
    • feathery leaves
    • clonal; often found in patches

  • 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

  • Apocynum cannabinum / common dogbane

    • herbaceous perennial with red stems and long/narrow leaves
    • leaves have prominent veins
    • leaves and stems exude white latex if broken
    • white, bell-shaped flowers held erect in stalked clusters
    • seedpods long, thin and brownish; in pairs
    • often near streams or in moist places

  • Arctium minus / lesser burdock

    • purple to pink to lavender thistle-like flowers with hooked bracts
    • nasty hooked seed heads
    • very large, heart-shaped leaves
    • found in a wide variety of disturbed areas

  • Artemisia absinthium / wormwood

    • deeply lobed leaves; grey-green (hairy); aromatic (like sage)
    • stems to 4' tall; up to 20 per plant
    • small clusters of teeny yellow flowers in drooping heads
    • disturbed areas and may be weedy

  • Barbarea vulgaris / yellow rocket

    • showy yellow brassica with relatively large flowers
    • leaves deeply lobed with larger terminal lobe, smaller toward top of stems
    • common on roadsides and waste places in spring
    • siliques about an inch long and curving upward, with beaks and pedicels

  • 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

  • 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!

  • 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

  • Carduus nutans / musk thistle

    • quite large, very purple flower heads
    • spiny everything... leaves, stems, bracts
    • biennial - large rosette of nasty leaves in first year
    • dandelion-like fruit that flies away like the down of a thistle
    • disturbed lands... pastures, wastelands, roadsides, construction sites

Showing 1–12 of 52 results