disturbed

Showing 73–84 of 94 results

  • Pteridium aquilinum / common bracken

    • a fern with large, triangular fronds, up to 4 ft tall
    • fronds subdivided into triangular leaflets
    • herbaceous perennial
    • deciduous with annual regrowth first appearing as fiddleheads in spring
    • wide range of habitats, including full sun

  • 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

  • Rubus parviflorus / thimbleberry

    • raspberry-like shrub usually in a clump
    • white flowers with many stamens, up to 2.5 inches diameter
    • large, fuzzy maple-like leaves
    • blooms in spring; red, raspberry-like fruit in the fall

  • 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

  • Shepherdia canadensis / Canadian buffaloberry

    • deciduous shrub, opposite branches and leaves; understory
    • trichomes (hairs) on lower, often upper surfaces.
    • lower surface has rust-colored scales
    • teeny yellowish flowers before leaves appear; male and female on separate plants
    • red or orange, oval fruits with one stony seed; soapy when crushed

  • Silene latifolia / white campion

    • white, 5-petaled flowers with distinctive inflated calyx (bladder)
    • flowers in clusters atop stems
    • whole plant densely hairy
    • widespread on alkaline soils (e.g. the Valley)

  • 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

  • Solidago missouriensis / Missouri goldenrod

    • perennial herb, up to 40" tall
    • inflorescence is a branching panicle with many (≥200) yellow flower heads
    • involucres are ¼ long with 3 or 4 layers of narrow, pointed, hairless, yellow-green bracts
    • leaves are thin and lanceolate, upright and rigid with prominent midribs
    • upper leaves have pronounced but small teeth

  • 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

Showing 73–84 of 94 results