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  • Spyrogira spp./ green slime

    • unbranched, filamentous green alga
    • usually as slimy patches or long "tresses"
    • anchors to pondweed by entanglement
    • prefers the more nutrient rich waters drained from pastures

  • Stenotus acaulis / stemless goldenweed

    • very short, mat forming perennial yellow "daisy"
    • thin, lance-shaped leaves, pointing upward
    • yellow flower head with 6-15 ray florets, up to 50 disk florets
    • in dry, rocky, open-scrub habitats

  • Streptopus amplexifolius / white twisted-stalk

    • creeping herb
    • oval, clasping leaves; parallel veins; sharp tip
    • pronounced stem "kink" at each node gives twisted look
    • drooping, cream-colored flowers, 6 recurved tepals, borne singly
    • single, elongated red berries in fall
    • found in moist undergrowth

  • Stuckenia pectinata / sago pondweed

    • submerged aquatic - dominant in its habitat
    • grass-like (but not a grass); waves in the current
    • branched with ~5" pointed leaves

  • Symphiocarpos oreophilus / mountain snowberry

    • small pink (or white) bell or funnel shaped flowers, singly or in pairs
    • shrub - upright or spreading
    • most visible in late summer when the white "berries" ripen
    • in the open or in canopy gaps; along the sides Forest Service roads

  • 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

  • Telesonix heucheriformis / false saxifrage

    • alpine or subalpine
    • on scree, rock faces, cliffs, in cracks
    • glandular, slightly lobed leaves (common for the family)
    • teeny red or purple-ish flowers in large-ish clusters
    • blooms in August at high altitudes

  • Tetradymia canescens / spineless horsebrush

    • shrub - up to 3 feet tall and across; round
    • small, yellow composite flowers in clusters of 4 to 8
    • dandelion-like seeds often present with flowers
    • primary leaves short and linear; long-lived
    • secondary leaves in axils of primaries are short-lived
    • primary leaves are not spines

  • Thalictrum occidentale / western meadow-rue

    • delicate compound leaves, each segment with 3 lobes
    • leaves "look like" columbine
    • male and female flowers on separate plants
    • all flowers teeny, in clumps, somewhat to really purple
    • in moist habitats, esp. stream banks in forests

  • 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

Showing 289–300 of 327 results