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Native Plant Trust: Go Botany Discover thousands of New England plants

Page 25: 350 results for involucre

  • Cirsium muticum (swamp thistle)

    Cirsium muticum Michx.. swamp thistle. Non-Monocots Composites Facts About: Swamp thistle is a native thistle of wetland margins and saltmarsh margins. The swamp metalmark butterfly ...

  • Symphyotrichum frondosum (leafy annual American-aster)

    Symphyotrichum frondosum (Nutt.) Nesom. leafy annual American-aster. Non-Monocots Composites Facts About: Leafy annual American-aster, native to the western states and Baja Californi...

  • Lasthenia californica (California goldfields)

    ... involucre 4–6 mm tall, pappus of 2 or 3 narrow-lanceolate to lanceolate scales intermixed with shorter, truncate, fringed scales or absent and leaf blades entire to toothed (vs. L. califo...

  • Coreopsis tinctoria (golden tickseed)

    Coreopsis tinctoria Nutt.. golden tickseed. Non-Monocots Composites Facts About: Golden tickseed is a widely-grown garden ornamental, and has spread throughout the eastern United Sta...

  • Coreopsis tripteris (tall tickseed)

    Coreopsis tripteris L.. tall tickseed. Non-Monocots Composites Facts About: Tall tickseed, as the name suggests, is a tall plant that can reach 8 feet or more in height. Outside of i...

  • Centaurea scabiosa (greater knapweed)

    ... involucre 6-8 mm wide, the bracts with several prominent longitudinal veins, and fertile flowers 12-15 mm long (vs. C. scabiosa, with the involucre 18-25 mm wide, the bracts lacking promi...

  • Centaurea melitensis (Maltese knapweed)

    Centaurea melitensis L.. Maltese knapweed. Non-Monocots Composites Facts About: Maltese knapweed is native to the Mediterranean and a serious weed in some parts of the United States....

  • Erigeron philadelphicus (Philadelphia fleabane)

    Erigeron philadelphicus L.. Philadelphia fleabane. Non-Monocots Composites Facts About: Phildelphia fleabane is native to North America and introduced in Europe and Asia. There are t...

  • Solidago leiocarpa (Cutler's goldenrod)

    Solidago leiocarpa DC.. Cutler's goldenrod. Non-Monocots Composites Facts About: Cutler's goldenrod is a rare alpine species, found on ridges, plateaus and ravines in Maine...

  • Ageratum houstonianum (Houston's whiteweed)

    Ageratum houstonianum P. Mill.. Houston's whiteweed. Non-Monocots Composites Facts About: An annual introduced from Mexico and Central America, Houston's whiteweed is an es...