non-native

Showing 13–24 of 55 results

  • 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

  • Centaurea maculosa / spotted knapweed

    • "vibrant" pink flowers
    • dark tips on the sepals ("bud scales") - the "spotted" in the name
    • biennial - rosette of leaves in first year
    • officially a noxious weed

  • Cirsium arvense / Canada thistle

    • purple or lavender clearly-thistle flower heads
    • multiple small flower heads per stem
    • deeply lobed, spiny leaves, but stems not spiny
    • clonal and perennial
    • in clumps or along roads, sometimes quite large/long

  • Cirsium vulgare / bull thistle

    • very nasty spines all over, including stems
    • purple flower head over pear/egg-shaped narrow, spiny bracts
    • fruits are thistle-downy
    • disturbed areas, but also forest gaps, stream sides and seeps

  • 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

  • Cynoglossum officinale / houndstongue

    • reddish-purple flowers in upper leaf axils
    • forms basal rosette with hairy leaves in first year
    • stem leaves lance shaped, hairy, rough
    • fruit - small nutlets with barbs or hooks

  • Dactylis glomerata / orchardgrass

    • perennial bunchgrass
    • branched inflorescence with lowest branch well below the others
    • spikelets wedge-shaped, flattened in tight clusters
    • florets green to red/purple tinged; grey-brown when seeds mature
    • introduced and widespread, but not in wet areas

  • Dianthus armeria / Deptford pink

    • PINK! 5 petaled, very small flowers
    • Toothed edges; white spots on petals, numerous stamens
    • Linear, opposite leaves; bases make sheath around stem
    • Disturbed areas; happy enough in the worst of soils

  • Erysimum cheiranthoides / wormseed wallflower

    • yellow, 4-petaled flower, less than 1/3 inch across
    • lance shaped or elliptical, sessile leaves varying little in size or shape
    • leaf margins entire or coarsely toothed
    • ribbed stems
    • ascending or erect siliques with short pedicels
    • disturbed and waste areas

  • Hesperis matronalis / dame’s rocket

    • biennial, 3+ feet tall in second year
    • 4-petaled flowers, especially purple or lavender
    • large inflorescences with many flowers
    • garden escapee
    • roadsides, waste places

  • Hyocyamus niger / black henbane

    • highly toxic! including contact dermatitis
    • 5-lobed, funnel-shaped flowers, brownish yellow with purple veins and center; 1.5" across
    • flowers in summer, e.g. warm June, July
    • elliptical leaves, pointy tips, toothed or lobed margins, prominent veins
    • highly disturbed areas: wastelands, field edges etc.

Showing 13–24 of 55 results