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Weed Science Flashcards

(86 cards)

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0
Q

Giant Hogweed

A

Heracleum mantegazzianum
Apiaceae
Perennial

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1
Q

Redroot Pigweed

A

Amaranthus retroflexus
Amaranthaceae
Annual

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2
Q

Hardhack

A

Spiraea tormentosa
Rosaceae
Perennial

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3
Q

Lamb’s Quarters

A

Chenopodium album
Chenopodiaceae
Annual

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4
Q

Yellow Toadflax

A

Linaria Vulgaris
Scrophlariaceae
Perennial

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5
Q

Purple Loosestrife

A

Lythrum salicaria
Lythraceae
Perennial
Square stem

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6
Q

Bracken Fern

A

Pteridium aquilinum
Dennstaedtiaceae
Perennial

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7
Q

Field Horsetail

A

Equisetum arvense
Equisetaceae
Perennial

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8
Q

Corn Spurry

A

Spergula arvensis
Caryophyllaceae
Summer or Winter Annual

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9
Q

Hedge Bindweed

A

Calystegia sepum
Convolvulaceae
Perennial

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10
Q

Mouse-eared chickweed

A

Cerastium vulgatum
Caryophyllaceae
Perennial
Slightly furry leaves

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11
Q

Black Nightshade

A

Solanum nigrum
Solanceae
Perennial

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12
Q

Japanese Knotweed

A

Fallopia japonica
Polygonaceae
Perennial

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13
Q

Yellow Flag Iris

A

Iris pseudocorus
Iridaceae
Perennial

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14
Q

Prostrate Knotweed

A

Polygonum aviculare
Polygonaceae
Annual

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15
Q

Broadleaf dock

A

Rumex obtusifolius
Polygonaceae
Perennial

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16
Q

Sheep Sorrel

A

Rumex acetosella
Polygonaceae
Annual OR Perennial

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17
Q

Wild Buckwheat

A

Polygonum Convolvulus
Polygonaceae
Annual
Sandpapery texture

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18
Q

Stinkweed

A

Thlaspi arvense
Brassicaceae
Annual

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19
Q

Stork’s Bill

A

Erodium circutarium
Geraniaceae
Annual

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20
Q

Hedge Mustard

A

Sisymbrium officiniale
Brassicaceae
Annual

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21
Q

Shepherd’s Purse

A

Capsella bursa-pastoris
Brassicaceae
Annual

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22
Q

Hoary Alyssum

A

Berteroa incana
Brassicaceae
Annual or Perennial

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23
Q

Little bittercress

A

Cardamine oligosperma
Brassicaceae
Annual or Biennial

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24
Wild Radish
Raphanus raphanistrum Brassicaceae Annual
25
Creeping Yellow Cress
Rorippa sylvestris Brassicaceae Perennial Slightly ragged or pinnate look
26
Common mullein
Verbascum thapsus Scropulariaceae Biennial
27
Lady's thumb
``` Polygonum persicaria Polygonaceae Annual OR Persicaria maculosa Hairy ligules ```
28
Foxtail barley
Hordeum jubatum Poaceae Perennial
29
St. John's Wort
Hypericum perforatum Hypericaceae Perennial Slight perforations around margin of leaf
30
Petty Spurge
Euphorbia peplus Euphorbiaceae Annual
31
Stinging nettle
Urtica dioica Urticaceae Perennial
32
Common mallow
Malva neglecta Malvaceae Annual to short perennial
33
Fireweed
Epilobium angustifolium Onagraceae Perennial OR Chamerion angustifolium
34
Purslane
Portulaca oleracea Portulacaceae Annual
35
Green foxtail
Setaria viridis Poaceae Annual
36
Barnyard Grass
Echinochloa crusgali Poaceae Annual No fur!
37
Annual bluegrass
Poa annua Poaceae Annual
38
Green Smartweed
``` Polygonum scabrum or lapathifolium Polygonaceae Annual OR Persicaria lapathifolium No hair on ligules ```
39
Large crabgrass
Digitaria sangulinalis Poaceae Annual
40
Quackgrass
Agropyron repensi Poaceae Perennial Only hairy on upper leaf, presence of auricles
41
Witchgrass
Panicum capillare Poaceae Annual Has hair!
42
Smooth crabgrass
Digitaria ischaemum Poaceae Annual
43
Himalayan Blackberry
Rubus armeniacus Roasaceae Perennial
44
Downy Brome
Bromus tectorum Poaceae Annual Very hairy leaves, twisting leaves
45
Distinguish Lady's Thumb and Green Smartweed (Give scientific names)
Lady's Thumb (Polygonum persicaria) has hairy ligules and is often spotted with pink flowers while Green Smartweed (Polygonum scabrum) has smooth ligules, no spots, and white flowers.
46
Distinguish Common Chickweed and Mouse-eared Chickweed.
Common Chickweed (Stellaria media) is an annual with relatively smooth leaves whereas Mouse-eared Chickweed is a perennial with fuzzy leaves.
47
Distinguish Hedge Bindweed and Wild Buckwheat
Hedge Bindweed (Calystegia sepium) is a perennial with large white flowers (fused corolla) whereas Wild Buckwheat is an annual with smaller flowers and a sandpapery texture to the leaves.
48
Distinguish Creeping Yellow Cress and Little Bittercress
Little bittercress (Cardamine oligosperma) is an annual and has smoother, kidney-shaped leaves arranged alternately as pinna whereas Creeping Yellow Cress (Rorippa sylvestris) is a perennial with slightly more ragged margins and the leaves are fused to the stipe.
49
Distinguish Witchgrass and Barnyard Grass
Witchgrass (Panicum capillare) is hairy along the stem and the inflorescence resembles a broom. Barnyard grass is smooth.
50
Reed Canary Grass
Phalaris arundinaceae Poaceae Perennial 45 degree angle leaves
51
Distinguish Downy Brome and Quackgrass
Downy Brome (Bromus tectorum) is an annual with no auricles but a large jagged ligule and is slightly fuzzy with twisting leaves. Quackgrass is a perennial with auricles and only has a slight bit of hair on the upper surface.
52
Name and differentiate Green Foxtail and Barnyard Grass.
Green Foxtail (Setaria viridis) is an annual with an upright growth pattern and bristled inflorescence, whereas Barnyard Grass (Echinochloa crus-galli) is an annual with a low growth pattern and smooth inflorescence.
53
Compare and differentiate Redroot Pigweed and Broadleaf Dock
Redroot Pigweed is an annual with reddish stems near the roots, sparsely hairy leaves, and numerous green spikes (inflorescence). Broadleaf dock is a perennial with green stems, smooth, yet wrinkly leaves (mostly basal).
54
Distinguish Shepherd's Purse, Stinkweed, and Wild radish.
Shepherd's Purse has heart-shaped fruits and rosette leaves are lobed (shallow or deep) whereas stem leaves are sessile. Stinkweed has lilypad shaped seed pods and whole, stalked, rosette leaves with slightly wavy margins. Wild Radish has deeply divided rosette leaves, leguminous seed pods.
55
Distinguish Corn Spurry and Field Horsetail
Corn Spurry is an annual with small white flowers whereas Field Horsetail is a perennial that bears cones. Horsetail has hollow stems and underground rhizomes as well as 6-8 branches per whorl whereas Spurry is branching from the base and has 6-30 leaves per whorl
56
Perennial sow-thistle
Sonchus arvensis Asteraceae Perennial
57
Spiny annual sow-thistle
Sonchus oleraceus Asteraceae Annual
58
Spotted cat's ear
Hypochaeris radicata Asteraceae Perennial
59
Tansy
Tanacetum vulgare Asteraceae Perennial
60
Creeping buttercup
Ranunculus repens Ranunculaceae Perennial
61
Narrow-leaved plantain
Plantago lanceolata Plantaginaceae Perennial
62
Broad-leaved plantain
Plantago major Plantaginaceae Perennial
63
Red Clover
Trifolium pratense Fabaceae Perennial
64
Scotch broom
Cytisus scoparius Fabaceae Perennial
65
Dandelion
Taraxacum officiniale Asteraceae Annual
66
Canada Goldenrod
Solidago canadensis Asteraceae Perennial
67
Common burdock
Articum minus Asteraceae Biennial
68
Bull thistle
Cirsium vulgare Asteraceae Biennial
69
Yarrow
Achillea millefolium Asteraceae Perennial
70
Diffuse knapweed
Centaurea diffusa Asteraceae Biennial
71
Canada fleabane
Conyza canadensis Asteraceae Annual or Winter Annual
72
Canada thistle
Cirsium arvense Asteraceae Perennial
73
Kudzu
Pueraria montana var. lobata Fabaceae Perennial
74
Flowering Rush
Butomus umbellatus Butomaceae Perennial
75
Yellow Archangel
Lamiastrum galeobdolan Lamiaceae Perennial
76
Yellow Starthistle
Centaurea solstitialis Asteraceae Winter Annual
77
Hound's Tongue
Cynoglossum officinale Boraginaceae Biennial
78
English Ivy
Hedera helix Araliaceae Perennial
79
English Holly
Ilex aquifolium Aquifoliaceae Perennial
80
Tansy Ragwort
Senecio jacobaea Asteraceae Biennial to short-lived perennial
81
Henbit
Lamium amplexicaule Lamiaceae Annual
82
Daphne Laurel
Daphne laureola Thymelaeaceae Perennial
83
White Clover
Trifolium repens Fabaceae Perennial?
84
Black medick
Medicago lupulina Fabaceae Annual
85
Tufted Vetch
Vicia cracca Fabaceae Perennial

Plant Science (5 decks)

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