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Plant
habit
vines / lianas
grass-like
special groups
composites
spurges
dicots
monocots
longevity
annual or biennial
perennial
sap
latex absent (sap clear)
latex present
Leaves
arrangement/phyllotaxy
basal
alternate
opposite
whorled
blade division
all simple
deeply lobed or divided
some or all fully compound
leaf (blade) presence
leaf blades present
no leaves apparent
leaf attachment
sessile or nearly so
leaf stalk (petiole) clearly present
sheathing
Flower
principal flower color
white or cream
purple
green
yellow
orange
red
pink
inconspicuous
flower type
daisy- or dandelion-like
radial symmetry 4 petals
radial symmetry 5 petals
petals indistinguishable
ovaries/pistils per flower
1
more than 5
Fruit or Cone
fruit consistency at maturity
dry/leathery
fleshy
mature fruit dehiscence
opening along 1-2 seams
opening along 3 to many seams
does not split open to release seed
PSC 5550/6550 Set 2 Weeds
Corey V. Ransom and Heather Elwood
Species Count: 25
Amaranthaceae
Amaranthus blitoides
Bassia scoparia
Salsola tragus
Asteraceae
Helianthus annuus
Brassicaceae
Brassica nigra
Capsella bursa-pastoris
Thlaspi arvense
Convolvulaceae
Cuscuta pentagona
Euphorbiaceae
Euphorbia dentata
Malvaceae
Abutilon theophrasti
Poaceae
Aegilops cylindrica
Avena fatua
Cenchrus longispinus
Echinochloa crus-galli
Elymus repens
Hordeum jubatum
Panicum miliaceum
Secale cereale
Setaria viridis
Sorghum halepense
Ranunculaceae
Ceratocephala testiculata
Rubiaceae
Galium aparine
Solanaceae
Physalis virginiana
Solanum physalifolium
Zygophyllaceae
Tribulus terrestris