Red-colored links include photos:

alfalfa
Algerian ivy
annual bluegrass
Australasian fireweed
Australian brass buttons
Australian saltbush
bearded Mediterranean grass
beet
Bermuda buttercup
Bermuda grass
bindweed
bird's foot trefoil
black locust
black mustard
blackwood acacia
bladderflower
blessed thistle
blue gum
brass buttons
bristly ox-tongue
broad-leaf filaree
brome fescue
bull thistle
bur-clover
Cape-Ivy
celery
century plant
charlock
chickweed, common
chicory
Chilean chess
common chickweed
common dandelion
common fig
common groundsel
common knotweed
common loosestrife
common mullein
common plantain
common purslane
common sow-thistle
creeping wood-sorrel
cruel vine; crule plant
crystalline iceplant
cultivated barley
cultivated oats
curly dock
cutleaf geranium
dandelion, common
darnel
ditch beard grass
Dutch elm
dwarf nettle
English plantain
English ryegrass
English walnut
epazote
false brome
fennel
fiddle dock
field mustard
fig, common
flax-leaved fleabane
forest red gum
four-leaved all-seed
foxtail
foxtail
foxtail fescue
garden pea
garland chrysanthemum
gaura
geranium
German-ivy
giant reed
goldentop
green dock
groundsel, common
Harding grass
hairy sand spurrey
hedge mustard
henbit; dead-nettle
hoary cress
hollyhock
hood canary grass
horehound
hottentot-fig
Italian ryegrass
Italian stone pine
Italian thistle
jointed charlock
jointed goatgrass
kikuyu grass
knotted hedge-parsley
knotweed, common
loosestrife, common
low amaranth
Madrid brome
mayweed
Mediterranean barley
Mediterranean canary grass
Mediterranean grass
Mexican tea
milk thistle
mission cactus
Monterey cypress
mouse-eared chickweed
mullein, common
narcissus
narrow-leaved filago
nettle-leaf goosefoot
New Zealand spinach
nit grass
olive
opium poppy
orchard grass
oyster plant
pampas grass
periwinkle
Persian knotweed
Peruvian pepper tree
petty spurge
pineapple weed
plantain, common
plume acacia
poison hemlock
prickly lettuce
prickly sow-thistle
purple vetch
purslane, common
rabbitsfoot grass
red brome
red iron bark
red valerian
redstem filaree
rescue grass
ripgut brome
rice grass
river red gum
Russian-thistle; tumbleweed
salt cedar
salsify
sand spurrey
scarlet pimpernel
sea rocket
sea-fig
sheep sorrel
shepherd's purse
short-podded mustard
sickle grass
silver-leaved horse nettle
slender wild oats
small-flowered iceplant
smilo grass
smooth cat's ear
soft chess
sow-thistle, common
Spanish broom
spreading hedgeparsley
spiny clotbur
spotted spurge
spring vetch
sour grass
sweet fennel
tall fescue
tamarisk
thin tail
tocalote
tomato
tree tobacco
tumbleweed
umbrella sedge
Veldt grass
Wall bedstraw
water bent
water speedwell
weedy cudweed
white nightshade
white sweet-clover
whitestem filaree
wild oats
wild radish
willow lettuce
windmill pink
woodland brome
yellow star-thistle
yellow sweet-clover