disturbed

Showing 85–96 of 101 results

  • 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

  • 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

  • Taraxia tanacetifolia / tansyleaf evening primrose

    • single, sessile, bright yellow, cup shaped flowers; 4 petals
    • grows as a rosette, flat to the ground
    • leaves are up to 12 inches long; very deeply lobed
    • still blooming in mid-October; starts in mid summer
    • grows on sandy/gravelly soil, e.g. drying lake beds

  • 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

  • Tripleurospermum inodorum / scentless chamomile

    • daisy-like blossoms with finely divided leaves
    • central disk shape changes from button- to dome- to hemisphere- with age
    • ray petals droop as disk expands
    • leaves don't smell when crushed

  • Turritis glabra / tower mustard

    • long (3"-ish) stick-like seedpods, erect and hugging the stem
    • nondescript mustard-family 4 petalled flowers in a cluster at the top
    • tall stem with leaves clasping the stem (no petioles)
    • generally in exposed, dry habitats

Showing 85–96 of 101 results