Flashcards
Idaho Noxious Weeds
Cards in this deck (19)
- 1—Black henbane
Hyoscyamus niger
Solanaceae
Up to 4ft tall, conspicuous midrib on leaves - 2—Knotweed
Polygonum spp. (AKA Fallopia spp.)
Polygonaceae (Buckwheat family)
3-4 m at maturity
- 3—Brazilian elodea
Egeria densa
Hydrocharitaceae (waterweed family)
Spiny leaves, white flowers
- 4—Buffalo-bur
Solanum rostratum
Solanaceae
2ft tall. Highly lobed leaves, many spines
annual
- 5—Canada thistle
Cirsium arvense
Astereaceae
- 6—Common curpina
Crupina vulgaris
Asteracae
winter annual, up to 4 ft, bristly edged leaves
- 7—European frogbit
Hydrocharis morsus-ranae
Hydrocharitaceae (waterweed family)
Emergent free-floating aquatic annual leaves 1-2 in wide
- 8—Dalmatian toadflax
Linaria dalmatica
Scrophulariaceae (figwort family)
Creeping perennial, up to 3ft high, taller with wider leaves than yellow toadflax
- 9—Diffuse knapweed
Centaurea diffusa
Asteraceae
Usually white, sometimes pink/lavender flowers, annual or biennial, 3ft tall
- 10—Dyer's woad
Isatis tinctoria
Brassicaceae
Biennial up to 4ft high
- 11—Fanwort
Cabomba caroliniana
Cabombaceae (water shields and fanworts)
Aquatic perennial
- 12—Feathered mosquito fern
Azolla pinnata
Azollaceae (mosquito fern family)
Aquatic free floating annual
- 13—Cield bindweed
Convolvulus arvensis
Convolvulaceae (morning glory family)
One of the most noxious weed in ag. Perennial vine, can form dense mats
- 14—Flowering rush
Butomus umbellatus
Butomaceae (flowering rush family)
Lanceolate leaves, triangular in cross section, up to 40 in long
- 15—Giant hogweed
Heracleum mantegazzianum
Apiaceae (carrot or parsley family)
Biennial or perennial, up to 15 ft tall, purple blockhed stems
similar to cow parsnip which lacks purple
- 16—Giant salvinia
Salvinia molesta
Salviniaceae (floating fern family)
Free floating aquatic, feather-like roots, stiff hairs on upper leaf surface that resemble eggbeaters
- 17—Hoary alyssum
Berteroa incana
Brassicaceae
Annual or short lived perennial, multiple stems from base, up to 2ft tall, with grey-green star shaped hairs
- 18—Hoary cress (whitetop)
Cardaria draba
Brassicaceae
Creeping perennial up to 2 ft tall,
alternate lanceate leaves,
small 4 petaled flowers
- 19—