weed

Showing 37–48 of 52 results

  • Prunella vulgaris / self-heal

    • compact spike of tiny purple, mint-like flowers
    • upper/lower lips purple and white respectively
    • square stems, opposite leaves

  • Rhamphospermum arvense / Charlock

    • yellow-flowered brassica; flowers larger than most mustards
    • large-ish leaves with toothed margins
    • erect stems; look for a reddish purple ring at stem junctions
    • disturbed areas, road sides and waste places; prefers high nutrients
    • 1" siliques point out or up, but not down

  • Rumex acetosella / sheep sorrel

    • long, vertical inflorescences... not compact or well "organized"
    • female plants with red/maroon flowers; males with green/white flowers
    • especially visible when seeds are ripe... red
    • basal rosette of arrowhead shaped leaves
    • disturbed areas, wastelands, poor sites

  • Rumex crispus / curly dock

    • rather large, lance-shaped leaves
    • curly leaf margins, like crisped bacon or "crinkly-wavy"
    • tall flowering stalks with many, many small yellow/green-ish flowers
    • fruits are just like the flowers but deep red
    • widespread and very much a weed

  • Sisymbrium altissimum / tumble mustard

    • inflorescence a raceme with yellow, teeny flowers
    • long, thin seed pods (siliques)
    • blooms throughout the spring and summer
    • shoots look like a bunch of sticks glued together
    • dries and breaks off, then tumbles

  • Solanum physalifolium / ground cherry nightshade

    • flowers look like potato or tomato flowers
    • small white, 5 recurved petals
    • clump of yellow stamens protrude from flower
    • triangular leaves with wedge-shaped bases
    • usually sprawling on ground

  • Solidago canadensis / goldenrod

    • large sprays of yellow flowers in late summer and fall
    • often tall and in large colonies
    • lance-shaped, toothed leaves
    • mostly (but not always) in disturbed areas

  • Sonchus arvensis / field sowthistle

    • yellow dandelion-like
    • multiple flowers per stalk
    • often in patches in wet fields
    • leaves spiney but without lobes, clasping the stems
    • often several stems from a single point at the soil level

  • Tanacetum vulgare / tansy

    • yellow, somewhat flattened, button-like flowers
    • pretty clearly in the aster family
    • camphor-ish smell
    • finely divided, fern-like compound leaves

  • Taraxacum officinale / dandelion

    • rosette growth habit with lobed leaves
    • yellow dandelion-like flowers - composites with only ray florets
    • only one flower head per stem
    • characteristic puff-ball seedheads
    • found anywhere and anytime

  • Thlaspi arvense / field pennycress

    • inflorescence a raceme with white, teeny flowers
    • oval seed pods ca. 1/3" across
    • blooms late spring and summer
    • continues blooming as pods fill from older flowers
    • common weed in disturbed habitats including cultivated land

  • Tragopogon spp. / salsify

    • large yellow inflorescence with pointy sepals extending past the "flower"
    • grass-like leaves
    • non-native, weed
    • widespread

Showing 37–48 of 52 results