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Middle Fork Snoqualmie Valley Invasive Weed Project

Middle Fork Snoqualmie Valley Invasive Weed Project. Sasha Shaw Education Specialist King County Noxious Weed Program. Agenda. Weed Surveys to Date Weed Priorities Priority Weeds Present in the Watershed Class A and B Noxious Weeds Other Priority Invasive Weeds

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Middle Fork Snoqualmie Valley Invasive Weed Project

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  1. Middle Fork Snoqualmie Valley Invasive Weed Project Sasha Shaw Education Specialist King County Noxious Weed Program

  2. Agenda • Weed Surveys to Date • Weed Priorities • Priority Weeds Present in the Watershed • Class A and B Noxious Weeds • Other Priority Invasive Weeds • Other Weeds – Lower Priority (except in the upper watershed) • Noxious Weeds Threatening to Invade • Survey Procedures

  3. Middle Fork Snoqualmie Weed Surveys Completed 2005 and 2006 • Roadsides (10 ft in on both sides) • Farther in where disturbance or weed infestations were observed • Disturbed Sites • Quarries, cut banks, logging landings • Camping sites, pullouts, trailheads, parking lots • Open talus fields, stream crossings • River by raft and river bars on foot

  4. Himalayan and Evergreen Blackberry Bohemian Knotweed Scotch Broom Reed Canary Grass English Holly English Ivy Butterfly Bush Tansy Ragwort* Yellow Hawkweed* Canada Thistle Hedge Bindweed Common Tansy Yellow Archangel Yellow Flag Iris European Mountain-Ash Spotted Knapweed* Bittersweet Nightshade Poison-hemlock Priority Weeds Identified in the Middle Fork Valley Listed in order of total area found. Weeds with * are designated for control in King County.

  5. Middle Fork Snoqualmie Weed Priorities • Washington State Noxious Weeds • Especially those designated in King County • Non-native species newly introduced or not previously reported in the valley • Excluded from the survey: species that are already pervasive in the valley and unlikely to be controlled valley-wide • In higher elevation areas, widespread weeds should be mapped if there is a chance to control them

  6. What are the Weed Classes? • Class A Weeds – new invaders, control required statewide, still a chance to eradicate • Class B and C Designates – control required in King County, still have a chance to stop them from getting established • Non-Designates and Weeds of Concern – widespread invasive weeds in King County, control not required but definitely a good idea whenever possible!

  7. Class A and B Noxious Weeds (Please notify the county noxious weed program if these are found)

  8. Class B Noxious Weed Tansy Ragwort (Senecio jacobaea) Flowering stems are 1-6 ft tall with clusters of yellow, daisy flowers First year rosettes have round-lobed leaves, reddish stems Flowers June to October. Seeds are viable for 10 to 16 years.

  9. Class B Noxious Weed Yellow Hawkweed(Hieracium caespitosum)

  10. Grows 3 - 5 feet tall, perennial Pink to purple flowers, on the tips of stem branches Floral bracts tipped with dark fringe Class B Noxious Weed Spotted Knapweed (Centaurea stoebe)

  11. Class B Noxious Weed Sulfur Cinquefoil(Potentilla recta)

  12. Other Priority Invasive Weeds in the MidFork

  13. Himalayan Blackberry(Rubus armeniacus, R. discolor)

  14. Evergreen Blackberry(Rubus laciniatus) http://www.nic.funet.fi http://www.biopix.dk

  15. Good Guy Look-Alike:Native Trailing Blackberry (Rubus ursinus)

  16. Bohemian Knotweed(Polygonum bohemicum)

  17. Stems tend to zig zag Flower clusters are upright along stems

  18. Scotch Broom (Cytisus scoparius)

  19. Butterfly Bush (Buddleia davidii) Leaves gray green above and white and fuzzy on the underside, finely toothed on margins Can grow 5 to 8 feet in a single season

  20. Butterfly Bush (Buddleia davidii) Seedlings thrive in open sandy soil Butterfly bush has invaded along the Tolt River

  21. Canada Thistle (Cirsium arvense)

  22. European Mountain-ash(Sorbus aucuparia)

  23. Native Mountain-ash (Sorbus sitchensis)

  24. English Holly (Ilex aquifolium) • Tree 15 to 50 feet tall and 15 feet wide • Bark smooth and gray • Leaves glossy, persistent, dark green, wavy and spiny • Flowers are small and white • Berries are bright red or orange and found in small bundles like the flowers

  25. Yellow ArchangelLamiastrum galeobdolon (a.k.a. Lamium) Small yellow mint-type flowers in leaf axils Slivery markings on leaves of this popular garden plant make it easy to spot invading into shady forests

  26. Class C Noxious Weed – Control Not Required Yellow Flag Iris(Iris pseudacorus)

  27. Tall rhizomatous grass, 3 to 6 feet Sturdy, hollow stems, sometimes reddish near top Loose leaf sheath Leaf blades flat, no hairs, to ¾ inch wide Large ligule Leaves come off stem at 45 degree angle Reed Canarygrass (Phalaris arundinacea) Large ligule Loose leaf sheath

  28. Other Common Weeds and Garden Escapees Present but not Surveyed(too pervasive for control or not of immediate concern) • Bull Thistle • Common Foxglove • Herb Robert/Robert’s Geranium • Common St. Johnswort • Oxeye Daisy • Creeping Buttercup • Hawksbeard, Hairy Cat’s Ear and Common Dandelion • Other Weeds and Garden Escapees

  29. Bull Thistle (Cirsium vulgare) Large spines on stems, leaves and under the flower head

  30. http://www.hlasek.com Foxglove (Digitalis purpurea)

  31. Herb Robert (a.k.a. Stinky Bob)

  32. St. Johnswort (Hypericum perforatum)

  33. Oxeye Daisy (Leucanthemum vulgare)

  34. Creeping Buttercup (Ranunculus repens)

  35. Hawksbeard (Crepis capillaris)

  36. Cat’s Ear or False Dandelion (Hypochaeris radicata)

  37. Nipplewort (Lapsana communis)

  38. Wall Lettuce (Lactuca muralis)

  39. http://sanangelo.tamu.edu/agronomy Prickly Lettuce (Lactuca serriola)

  40. Woodland Groundsel (Senecio sylvaticus)

  41. Curly Dock (Rumex crispus) Reddish or greenish flowers in a long, slender, branching cluster at the top of a stem bearing leaves with very wavy margins

  42. http://www.aphotoflora.com Periwinkle (Vinca minor) http://hflp.sdstate.edu/ho311/outdoor_images

  43. Russian Comfrey (Symphytum X uplandicum or S. peregrinum)

  44. Queen Anne’s Lace (Daucus carota)

  45. Noxious Weeds threatening to Invade (present nearby) • Orange Hawkweed (fields, roadsides) • Common Hawkweed (roadsides) • Sulfur Cinquefoil (roadsides) • Dalmatian Toadflax (roadsides) • Yellow Toadflax (roads and trails)

  46. Class B Noxious Weed Orange Hawkweed(Hieracium aurantiacum) • Flowers orange, in tight clusters • Stems leafless with black hairs • From a few inches to 2 feet tall • Reproduces by seed and runners • Bolts: May-June • Flowers: Late May to Sep/Oct • Seeds: Late June to Fall

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