Term
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Definition
Sisymbrium irio
deeply lobed alternate leaves
long petiole | long siliques
dinner-plate sized rosette
4 petalled yellow mustard flowers |
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Term
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Definition
Capsella bursa-pastoris
heart-shaped fruiting structure
finely lobed leaves with a compact rosette |
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Term
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Definition
Lamium amplexicaule
fat oblong cotyledons
sessile opposite round leaves
deeply etched margins
square mint stem |
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Term
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Definition
Erodium cicutarium
lobed midribbed cotyledon
red stem densely pubescent
very finely lobed leaves
large fleshy taproop | stork's bill |
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Term
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Definition
Lactuca serriola
spiny midrib (underside) | produces latex
short oval cotyledons | white composite flowers | prominent white midrib
Serrated ovate twisting leaves |
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Term
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Definition
Sonchus oleraceus
deeply lobed toothed leaves very wavy margins | rosette | mottled leaves
latex | yellow composite flowers
leaves clasp stem | no spines |
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Term
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Definition
Conyza Canadensis
long narrow notched leaves
very tall, sturdy stem |
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Term
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Definition
Bromus catharticus
swollen red nodes | membranous ligule
flattened raceme | no auricles
densely pubescent blades |
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Term
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Definition
Amaranthus palmeri
lanceolate reddish cotyledons
grooved margins | long petioles
alternate triangular hairless leaves
white watermark | red stem |
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Term
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Definition
Kochia scoparia
branched from base | dense habit
small lanceolate leaves sessile
extremely pubescent pale seedling |
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Term
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Definition
Salsola tragus
fleshy cylindrical leaves sharp tips
purple leaf undersides
heavily branched |
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Term
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Definition
Ipomoea coccinea
butterfly-shaped cotyledon
projections from smooth-margined leaves
heart-shaped, palmate, or deeply lobed
red flowers |
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Term
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Definition
Xanthium strumarium
dark glossy lanceolate cotyledon
shallowly lobed toothed triangular leaf
rough leaf surface | unique fruiting structure | black marks on stem |
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Term
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Definition
Solanum ptycanthum
black berries | purple underside
distinct smell | thick cuticle
toothed small triangular leaves
ovate pointed cotyledon |
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Term
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Definition
Solanum rostratum
deeply lobed leaves | black spots on stem
narrow lanceolate cotyledon
whole plant spiny | wavy margins |
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Term
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Definition
Proboscidea louisianica
square hairy cotyledon
round leaf clasping petiole
foul smelling sticky exudate
densely pubescent | distinct flower |
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Term
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Definition
Salvia reflexa
square stem | opposite scalloped leaves
long apical flowering stem
pale green triangular cotyledons |
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Term
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Definition
Hibiscus triomium
very dark green round, heart-shaped cot.
ddark green irregular narrow deeply lobed leaves
waxy round mallow leaves
distinct white flower purple center |
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Term
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Definition
Helianthus annuus
large opposite triangular serrated leaf
leaves pointed | wavy margins
widely branched |
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Term
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Definition
Euphorbia humistrata
latex | small ovate leaflet purple center
pubescent fleshy red stem | exudate
roots at every node |
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Term
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Definition
Tribulus terrestris
large dark green grooved cotyledon
narrow dense leaflets | no latex
distinct piercing fruiting structure |
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Term
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Definition
Portulaca oleracea
ovate succulent glossy dark leaves
smooth red margins | thick red stems
sessile | roots at every node | sessile |
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Term
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Definition
Echinochloa crus-galli
no ligule | no watermarks
purpling at the base | very awned
flattened sheath |
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Term
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Definition
Digitaria sanguinalis
extremely pubescent | round stem
serrated margins | blade clasps stem
large ligules | no auricles
distinct fruiting structure |
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Term
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Definition
Cenchrus incertus
flattened sheath | reddened at base
hairy fringed ligule | spiny fruit
hairless sheath, blade | rough leaf |
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Term
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Definition
Setaria glauca
flattened sheath | reddened at base
long white hairs at base of blade
fringed ligule | densely awned |
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Term
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Definition
Eleusine indica
branches from crown
shiny waxy cuticle over crown
distinct fruiting structure (zipper) |
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Term
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Definition
Poa annua
sheath and blade hairy
distinct bluegrass inflorescence
tip of blade keels upward | clumps
shallowly rooted |
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Term
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Definition
Oxalis stricta
trifoliate stems, heart-shaped leaves
distinct cylindrical fruiting structure
long slender fibrous roots | dense |
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Term
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Definition
Alternanthera pungens
dark glossy waxy ovate opposite leaves
smooth margins | low growing dense mat
short petioles | prominent veins
"chaffweed" flowers axillary clusters |
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Term
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Definition
Taraxacum officinale
variable lobed serrated wide leaves
shovelhead tip | yellow composite flower | single flowering stem | latex |
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Term
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Definition
Convolvulus arvensis
distinct arrowhead leaves | dense mat
short petiole | trailing stems
distinct pink/white flowers |
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Term
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Definition
Solanum elaeagnifolium
green/yellow berries | spiny all over
lanceolate blue leaves | very wavy margin | lavender flower, yellow anther |
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Term
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Definition
Helianthus ciliaris
blue sessile opposite lanceolate leaves
very wavy margins | rough surface
creeping | sunflower flowerhead |
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Term
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Definition
Ambrosia grayi
fine deep ragweed lobes blue scalloped leaves | small hooked but-like fruit
large deep reproductive roots |
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Term
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Definition
Cynodon dactylon
creeping perennial | stolon activity
crabgrass-like fruiting structure branched from a central point | short internodes | hairs at collar and blade
fringed and membranous ligule |
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Term
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Definition
Sorghum halepense
broadleaved grass | prominent white midrib | membranous tufted ligule
distinct sorghum raceme (less dense) |
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Term
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Definition
Paspalum dilatatum
clump grass | very distinct seedhead
appears to have ergot |
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Term
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Definition
Cyperus rotundus
very rhizomatous monocot
triangular stem | 3 leaves per node
tuber forms anywhere on rhizome
less bushy dark brown raceme |
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Term
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Definition
Cyperus esculentus
blade tapers before tip
bushy wide yellow raceme
tubers at end of rhizome only |
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